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Sieve tubes Cut Out Stock Images
Cucurbita sp. stem TS showing sieve tubes, brightfield photomicrograph Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-cucurbita-sp-stem-ts-showing-sieve-tubes-brightfield-photomicrograph-72722045.htmlRME68NKW–Cucurbita sp. stem TS showing sieve tubes, brightfield photomicrograph
A diagram to show the foods of the leaves that descend through the sieve tubes and that are stored in the cells of the medullary ray and the parenchym Stock Vectorhttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-diagram-to-show-the-foods-of-the-leaves-that-descend-through-the-sieve-tubes-and-that-are-stored-in-the-cells-of-the-medullary-ray-and-the-parenchym-image244485406.htmlRFT5N7HJ–A diagram to show the foods of the leaves that descend through the sieve tubes and that are stored in the cells of the medullary ray and the parenchym
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 338 MOSSES AND FERNS CHAP. primary tracheids are formed a group of similar ones, and from here the formation proceeds towards the central group of large tracheids, which are the last to have their walls thickened and lignified. The large secondary tracheids are scalariform, like those of the stem. The cells of the pericycle remain nearly unchanged, but in the two phloem masses, according to Poir- ault (I) sieve-tubes are always present. These tubes are of two types, those with horizontal trans Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-structure-and-development-of-mosses-and-ferns-archegoniatae-plant-morphology-mosses-ferns-338-mosses-and-ferns-chap-primary-tracheids-are-formed-a-group-of-similar-ones-and-from-here-the-formation-proceeds-towards-the-central-group-of-large-tracheids-which-are-the-last-to-have-their-walls-thickened-and-lignified-the-large-secondary-tracheids-are-scalariform-like-those-of-the-stem-the-cells-of-the-pericycle-remain-nearly-unchanged-but-in-the-two-phloem-masses-according-to-poir-ault-i-sieve-tubes-are-always-present-these-tubes-are-of-two-types-those-with-horizontal-trans-image232064066.htmlRMRDFC2A–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 338 MOSSES AND FERNS CHAP. primary tracheids are formed a group of similar ones, and from here the formation proceeds towards the central group of large tracheids, which are the last to have their walls thickened and lignified. The large secondary tracheids are scalariform, like those of the stem. The cells of the pericycle remain nearly unchanged, but in the two phloem masses, according to Poir- ault (I) sieve-tubes are always present. These tubes are of two types, those with horizontal trans
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 338 MOSSES AND FERNS CHAP. primary tracheids are formed a group of similar ones, and from here the formation proceeds towards the central group of large tracheids, which are the last to have their walls thickened and lignified. The large secondary tracheids are scalariform, like those of the stem. The cells of the pericycle remain nearly unchanged, but in the two phloem masses, according to Poir- ault (I) sieve-tubes are always present. These tubes are of two types, those with horizontal trans Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-structure-and-development-of-mosses-and-ferns-archegoniatae-plant-morphology-mosses-ferns-338-mosses-and-ferns-chap-primary-tracheids-are-formed-a-group-of-similar-ones-and-from-here-the-formation-proceeds-towards-the-central-group-of-large-tracheids-which-are-the-last-to-have-their-walls-thickened-and-lignified-the-large-secondary-tracheids-are-scalariform-like-those-of-the-stem-the-cells-of-the-pericycle-remain-nearly-unchanged-but-in-the-two-phloem-masses-according-to-poir-ault-i-sieve-tubes-are-always-present-these-tubes-are-of-two-types-those-with-horizontal-trans-image216368817.htmlRMPG0CHN–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. 338 MOSSES AND FERNS CHAP. primary tracheids are formed a group of similar ones, and from here the formation proceeds towards the central group of large tracheids, which are the last to have their walls thickened and lignified. The large secondary tracheids are scalariform, like those of the stem. The cells of the pericycle remain nearly unchanged, but in the two phloem masses, according to Poir- ault (I) sieve-tubes are always present. These tubes are of two types, those with horizontal trans
. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. IMPERFECT AND RUDIMENTARY BUNDLES. 369 The vascular groups of Cymodocea sequorea' and Zostera behave, both in the nodes and in the internodes, like those of the Potamogetons. The intercellular canal derived from the xylem lies in the small peripheral bundles on the inner side; outside this is a radially elongated phloem-group containing two or three large sieve-tubes ; in the thicker axial bundle the intercellular space occupies the middle, and in the case of Cymodocea has at its periphery four Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/comparative-anatomy-of-the-vegetative-organs-of-the-phanerogams-and-ferns-plant-anatomy-ferns-imperfect-and-rudimentary-bundles-369-the-vascular-groups-of-cymodocea-sequorea-and-zostera-behave-both-in-the-nodes-and-in-the-internodes-like-those-of-the-potamogetons-the-intercellular-canal-derived-from-the-xylem-lies-in-the-small-peripheral-bundles-on-the-inner-side-outside-this-is-a-radially-elongated-phloem-group-containing-two-or-three-large-sieve-tubes-in-the-thicker-axial-bundle-the-intercellular-space-occupies-the-middle-and-in-the-case-of-cymodocea-has-at-its-periphery-four-image232400721.htmlRMRE2NDN–. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. IMPERFECT AND RUDIMENTARY BUNDLES. 369 The vascular groups of Cymodocea sequorea' and Zostera behave, both in the nodes and in the internodes, like those of the Potamogetons. The intercellular canal derived from the xylem lies in the small peripheral bundles on the inner side; outside this is a radially elongated phloem-group containing two or three large sieve-tubes ; in the thicker axial bundle the intercellular space occupies the middle, and in the case of Cymodocea has at its periphery four
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. vii PTERIDOPHYTA—FILICINE^—OPHIOGLOSSACEM 265 The phloem is composed also of the same elements, large sieve-tubes, arranged in a pretty definite zone next the xylem, and smaller cells of similar appearance, but not showing the multinucleate character or perforated transverse walls of the latter. The sieve-tubes are large (Fig. 145), and in longi- tudinal section are seen to consist of rows of wide cells with either horizontal or oblique division walls. The transverse walls separating two membe Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-structure-and-development-of-mosses-and-ferns-archegoniatae-plant-morphology-mosses-ferns-vii-pteridophytafilicineophioglossacem-265-the-phloem-is-composed-also-of-the-same-elements-large-sieve-tubes-arranged-in-a-pretty-definite-zone-next-the-xylem-and-smaller-cells-of-similar-appearance-but-not-showing-the-multinucleate-character-or-perforated-transverse-walls-of-the-latter-the-sieve-tubes-are-large-fig-145-and-in-longi-tudinal-section-are-seen-to-consist-of-rows-of-wide-cells-with-either-horizontal-or-oblique-division-walls-the-transverse-walls-separating-two-membe-image216363146.htmlRMPG05B6–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. vii PTERIDOPHYTA—FILICINE^—OPHIOGLOSSACEM 265 The phloem is composed also of the same elements, large sieve-tubes, arranged in a pretty definite zone next the xylem, and smaller cells of similar appearance, but not showing the multinucleate character or perforated transverse walls of the latter. The sieve-tubes are large (Fig. 145), and in longi- tudinal section are seen to consist of rows of wide cells with either horizontal or oblique division walls. The transverse walls separating two membe
. Agricultural botany, theoretical and practical. Botany, Economic; Botany. THE GREEN FOLIAGE-LEAF 145 dicotyledons end blindly among the ground-tissue cells, are formed entirely of tracheids. The bast-tissue also undergoes a reduction of elements : as the end of the bundle is approached, the sieve-tubes and com- panion-cells are replaced by single long cells which do not extend so far as the woody elements of the bundle. Surrounding each bundle of the leaf is a sheathing tissue of parenchyma which is continuous with the parenchyma of the vascular cylinder of the stem. Such bundle-sheaths cond Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/agricultural-botany-theoretical-and-practical-botany-economic-botany-the-green-foliage-leaf-145-dicotyledons-end-blindly-among-the-ground-tissue-cells-are-formed-entirely-of-tracheids-the-bast-tissue-also-undergoes-a-reduction-of-elements-as-the-end-of-the-bundle-is-approached-the-sieve-tubes-and-com-panion-cells-are-replaced-by-single-long-cells-which-do-not-extend-so-far-as-the-woody-elements-of-the-bundle-surrounding-each-bundle-of-the-leaf-is-a-sheathing-tissue-of-parenchyma-which-is-continuous-with-the-parenchyma-of-the-vascular-cylinder-of-the-stem-such-bundle-sheaths-cond-image232380003.htmlRMRE1R1R–. Agricultural botany, theoretical and practical. Botany, Economic; Botany. THE GREEN FOLIAGE-LEAF 145 dicotyledons end blindly among the ground-tissue cells, are formed entirely of tracheids. The bast-tissue also undergoes a reduction of elements : as the end of the bundle is approached, the sieve-tubes and com- panion-cells are replaced by single long cells which do not extend so far as the woody elements of the bundle. Surrounding each bundle of the leaf is a sheathing tissue of parenchyma which is continuous with the parenchyma of the vascular cylinder of the stem. Such bundle-sheaths cond
. Fossil plants : for students of botany and geology . Paleobotany. 250 PTERIDOPHYTA. [CH. succeeded internally by the general ground-tissue of the stem. The xylem parenchyma next a carinal canal is succeeded externally by phloem tissue, consisting of short protoplasmic cells and longer elements, without nuclei and poor in contents; the latter may be regarded as sieve-tubes. On either side of the phloem, the xylem occurs in two separate bands or groups of annular and reticulately thickened tracheids. In some species, e.g. EquisetuTTi xylochaetum Metten.^ and E. giganteum^ L. a native of South Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/fossil-plants-for-students-of-botany-and-geology-paleobotany-250-pteridophyta-ch-succeeded-internally-by-the-general-ground-tissue-of-the-stem-the-xylem-parenchyma-next-a-carinal-canal-is-succeeded-externally-by-phloem-tissue-consisting-of-short-protoplasmic-cells-and-longer-elements-without-nuclei-and-poor-in-contents-the-latter-may-be-regarded-as-sieve-tubes-on-either-side-of-the-phloem-the-xylem-occurs-in-two-separate-bands-or-groups-of-annular-and-reticulately-thickened-tracheids-in-some-species-eg-equisetutti-xylochaetum-metten-and-e-giganteum-l-a-native-of-south-image216386220.htmlRMPG16R8–. Fossil plants : for students of botany and geology . Paleobotany. 250 PTERIDOPHYTA. [CH. succeeded internally by the general ground-tissue of the stem. The xylem parenchyma next a carinal canal is succeeded externally by phloem tissue, consisting of short protoplasmic cells and longer elements, without nuclei and poor in contents; the latter may be regarded as sieve-tubes. On either side of the phloem, the xylem occurs in two separate bands or groups of annular and reticulately thickened tracheids. In some species, e.g. EquisetuTTi xylochaetum Metten.^ and E. giganteum^ L. a native of South
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 8o STEM OF CUCURBITA long, apparently empty, sieve-tubes (s.) and the narrow, densely granular, companion cells (c.r.) are readily distinguished. The vessels of the metaxylem (p.v.) bear very dense spirals or occa- sionally bordered pits, whilst in the protoxylem the thickening takes the form of rings or a loose spiral {px.). The narrow elongated elements sometimes seen between are the wood- parenchyma cells. Further insight into the structure of the Dicotyledonous stem will be afforded by a study of that of Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/an-introduction-to-the-structure-and-reproduction-of-plants-plant-anatomy-plants-8o-stem-of-cucurbita-long-apparently-empty-sieve-tubes-s-and-the-narrow-densely-granular-companion-cells-cr-are-readily-distinguished-the-vessels-of-the-metaxylem-pv-bear-very-dense-spirals-or-occa-sionally-bordered-pits-whilst-in-the-protoxylem-the-thickening-takes-the-form-of-rings-or-a-loose-spiral-px-the-narrow-elongated-elements-sometimes-seen-between-are-the-wood-parenchyma-cells-further-insight-into-the-structure-of-the-dicotyledonous-stem-will-be-afforded-by-a-study-of-that-of-image232292674.htmlRMRDWRJX–. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 8o STEM OF CUCURBITA long, apparently empty, sieve-tubes (s.) and the narrow, densely granular, companion cells (c.r.) are readily distinguished. The vessels of the metaxylem (p.v.) bear very dense spirals or occa- sionally bordered pits, whilst in the protoxylem the thickening takes the form of rings or a loose spiral {px.). The narrow elongated elements sometimes seen between are the wood- parenchyma cells. Further insight into the structure of the Dicotyledonous stem will be afforded by a study of that of
. The fungi which cause plant disease . Plant diseases; Fungi. 204 THE FUNGI WHICH CAUSE PLANT DISEASE Germ tubes from ascospores or conidia enter the cortex and develop a rich mycelimn in the sieve tubes and soft host. This advances most rapidly during the dormant period of the bast. White or yellow stromata the size of a pin- head appear and bear numerous conidia. Later come the red perithecia whose ascospores ripen in winter or spring. N. ribis (Tode) Rab. Fig. 144.—n. ipo- Cespitose, Stroma compact; perithecia sub- of perithecia. globose, smooth; ostiole papillate; asci subclavate, After H Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungi-which-cause-plant-disease-plant-diseases-fungi-204-the-fungi-which-cause-plant-disease-germ-tubes-from-ascospores-or-conidia-enter-the-cortex-and-develop-a-rich-mycelimn-in-the-sieve-tubes-and-soft-host-this-advances-most-rapidly-during-the-dormant-period-of-the-bast-white-or-yellow-stromata-the-size-of-a-pin-head-appear-and-bear-numerous-conidia-later-come-the-red-perithecia-whose-ascospores-ripen-in-winter-or-spring-n-ribis-tode-rab-fig-144n-ipo-cespitose-stroma-compact-perithecia-sub-of-perithecia-globose-smooth-ostiole-papillate-asci-subclavate-after-h-image216459583.htmlRMPG4GBB–. The fungi which cause plant disease . Plant diseases; Fungi. 204 THE FUNGI WHICH CAUSE PLANT DISEASE Germ tubes from ascospores or conidia enter the cortex and develop a rich mycelimn in the sieve tubes and soft host. This advances most rapidly during the dormant period of the bast. White or yellow stromata the size of a pin- head appear and bear numerous conidia. Later come the red perithecia whose ascospores ripen in winter or spring. N. ribis (Tode) Rab. Fig. 144.—n. ipo- Cespitose, Stroma compact; perithecia sub- of perithecia. globose, smooth; ostiole papillate; asci subclavate, After H
. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. COURSE OF FOOD DISTRIBUTION 165 where the sieve tubes occur, it is plain that a slow movement in the many veinlets could feed a much more rapid flow in the few main channels; and this is presumably what happens.. Fig. 91.—Showing the effect of cutting across the veins on the removal of food from the leaf. j4 , all of the main veins are cut across near their bases; B, the mid-vein alone has been severed. The stippled areas indicate the starch reaction with the iodin Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/plant-anatomy-from-the-standpoint-of-the-development-and-functions-of-the-tissues-and-handbook-of-micro-technic-plant-anatomy-course-of-food-distribution-165-where-the-sieve-tubes-occur-it-is-plain-that-a-slow-movement-in-the-many-veinlets-could-feed-a-much-more-rapid-flow-in-the-few-main-channels-and-this-is-presumably-what-happens-fig-91showing-the-effect-of-cutting-across-the-veins-on-the-removal-of-food-from-the-leaf-j4-all-of-the-main-veins-are-cut-across-near-their-bases-b-the-mid-vein-alone-has-been-severed-the-stippled-areas-indicate-the-starch-reaction-with-the-iodin-image232411114.htmlRMRE36MX–. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. COURSE OF FOOD DISTRIBUTION 165 where the sieve tubes occur, it is plain that a slow movement in the many veinlets could feed a much more rapid flow in the few main channels; and this is presumably what happens.. Fig. 91.—Showing the effect of cutting across the veins on the removal of food from the leaf. j4 , all of the main veins are cut across near their bases; B, the mid-vein alone has been severed. The stippled areas indicate the starch reaction with the iodin
. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/pharmaceutical-botany-botany-botany-medical-fig-6closed-bundle-of-stem-of-zea-mays-vg-bundle-sheath-l-inter-cellular-space-a-ring-from-an-annular-tracheal-tube-sp-spiral-tracheal-tube-m-pitted-vessels-v-sieve-tubes-s-companion-cells-cp-crushed-primary-sieve-tubes-f-thjn-walled-parenchyma-of-the-ground-or-fundamental-tissue-from-sayre-after-strasburger-fig-7transverse-section-of-a-concentric-bundle-from-the-rhizome-of-iris-xylem-surrounding-the-phloem-i-tracheae-t-protoxylem-s-sieve-tubes-g-companion-cells-of-the-internal-phloem-portion-from-sayre-af-image216418163.htmlRMPG2KG3–. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. vii PTERIDOPHYTA—FILICINE^—OPHIOGLOSSACEM 265 The phloem is composed also of the same elements, large sieve-tubes, arranged in a pretty definite zone next the xylem, and smaller cells of similar appearance, but not showing the multinucleate character or perforated transverse walls of the latter. The sieve-tubes are large (Fig. 145), and in longi- tudinal section are seen to consist of rows of wide cells with either horizontal or oblique division walls. The transverse walls separating two membe Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-structure-and-development-of-mosses-and-ferns-archegoniatae-plant-morphology-mosses-ferns-vii-pteridophytafilicineophioglossacem-265-the-phloem-is-composed-also-of-the-same-elements-large-sieve-tubes-arranged-in-a-pretty-definite-zone-next-the-xylem-and-smaller-cells-of-similar-appearance-but-not-showing-the-multinucleate-character-or-perforated-transverse-walls-of-the-latter-the-sieve-tubes-are-large-fig-145-and-in-longi-tudinal-section-are-seen-to-consist-of-rows-of-wide-cells-with-either-horizontal-or-oblique-division-walls-the-transverse-walls-separating-two-membe-image232064396.htmlRMRDFCE4–. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. vii PTERIDOPHYTA—FILICINE^—OPHIOGLOSSACEM 265 The phloem is composed also of the same elements, large sieve-tubes, arranged in a pretty definite zone next the xylem, and smaller cells of similar appearance, but not showing the multinucleate character or perforated transverse walls of the latter. The sieve-tubes are large (Fig. 145), and in longi- tudinal section are seen to consist of rows of wide cells with either horizontal or oblique division walls. The transverse walls separating two membe
. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. 334 PRIMARy ARRANGEMENT OF TISSUES. Fig. 156. Cross-section through the vascular bundle In the midrib of the leaf of Olea Europaea (375). s-s the phloem, consisting of wide (parenchymatous ?) cells, and scattered groups of very narrow elements (sieve-tubes ?); comp. p. 3 2 5. f-f sclerenchymatous fibres, forming a girdle round the outer edge of the phloem, and occurring scattered on the inside of the xylem. The very dense xylem borders on the phloem internally; the primitive elements at its inne Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/comparative-anatomy-of-the-vegetative-organs-of-the-phanerogams-and-ferns-plant-anatomy-ferns-334-primary-arrangement-of-tissues-fig-156-cross-section-through-the-vascular-bundle-in-the-midrib-of-the-leaf-of-olea-europaea-375-s-s-the-phloem-consisting-of-wide-parenchymatous-cells-and-scattered-groups-of-very-narrow-elements-sieve-tubes-comp-p-3-2-5-f-f-sclerenchymatous-fibres-forming-a-girdle-round-the-outer-edge-of-the-phloem-and-occurring-scattered-on-the-inside-of-the-xylem-the-very-dense-xylem-borders-on-the-phloem-internally-the-primitive-elements-at-its-inne-image232400777.htmlRMRE2NFN–. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. 334 PRIMARy ARRANGEMENT OF TISSUES. Fig. 156. Cross-section through the vascular bundle In the midrib of the leaf of Olea Europaea (375). s-s the phloem, consisting of wide (parenchymatous ?) cells, and scattered groups of very narrow elements (sieve-tubes ?); comp. p. 3 2 5. f-f sclerenchymatous fibres, forming a girdle round the outer edge of the phloem, and occurring scattered on the inside of the xylem. The very dense xylem borders on the phloem internally; the primitive elements at its inne
. A manual of botany. Botany. 324 MANUAL OF BOTANY These resemble laticiferous vessels in one particular, as they contain latex, in which are generally true raphides; on the other Fig. 699.. Fig. 700. Fi(i. 699. DeTelopment of lysigenous gland in stem of Hypericiwi. The four figures represent successive stages, x 250. hand, they are unbranched and much like sieve tubes in form, consisting as they do of long, broad cells with sieve-like septa. They were first noticed by Hanstein in the scales of the bulb of Allium. Glandular Tissue.—This has a much more limited distribution than the laticiferou Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-manual-of-botany-botany-324-manual-of-botany-these-resemble-laticiferous-vessels-in-one-particular-as-they-contain-latex-in-which-are-generally-true-raphides-on-the-other-fig-699-fig-700-fii-699-detelopment-of-lysigenous-gland-in-stem-of-hypericiwi-the-four-figures-represent-successive-stages-x-250-hand-they-are-unbranched-and-much-like-sieve-tubes-in-form-consisting-as-they-do-of-long-broad-cells-with-sieve-like-septa-they-were-first-noticed-by-hanstein-in-the-scales-of-the-bulb-of-allium-glandular-tissuethis-has-a-much-more-limited-distribution-than-the-laticiferou-image232376338.htmlRMRE1JAX–. A manual of botany. Botany. 324 MANUAL OF BOTANY These resemble laticiferous vessels in one particular, as they contain latex, in which are generally true raphides; on the other Fig. 699.. Fig. 700. Fi(i. 699. DeTelopment of lysigenous gland in stem of Hypericiwi. The four figures represent successive stages, x 250. hand, they are unbranched and much like sieve tubes in form, consisting as they do of long, broad cells with sieve-like septa. They were first noticed by Hanstein in the scales of the bulb of Allium. Glandular Tissue.—This has a much more limited distribution than the laticiferou
. Fossil plants : for students of botany and geology . Paleobotany. 250 PTERIDOPHYTA. [CH. succeeded internally by the general ground-tissue of the stem. The xylem parenchyma next a carinal canal is succeeded externally by phloem tissue, consisting of short protoplasmic cells and longer elements, without nuclei and poor in contents; the latter may be regarded as sieve-tubes. On either side of the phloem, the xylem occurs in two separate bands or groups of annular and reticulately thickened tracheids. In some species, e.g. EquisetuTTi xylochaetum Metten.^ and E. giganteum^ L. a native of South Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/fossil-plants-for-students-of-botany-and-geology-paleobotany-250-pteridophyta-ch-succeeded-internally-by-the-general-ground-tissue-of-the-stem-the-xylem-parenchyma-next-a-carinal-canal-is-succeeded-externally-by-phloem-tissue-consisting-of-short-protoplasmic-cells-and-longer-elements-without-nuclei-and-poor-in-contents-the-latter-may-be-regarded-as-sieve-tubes-on-either-side-of-the-phloem-the-xylem-occurs-in-two-separate-bands-or-groups-of-annular-and-reticulately-thickened-tracheids-in-some-species-eg-equisetutti-xylochaetum-metten-and-e-giganteum-l-a-native-of-south-image231976686.htmlRMRDBCHJ–. Fossil plants : for students of botany and geology . Paleobotany. 250 PTERIDOPHYTA. [CH. succeeded internally by the general ground-tissue of the stem. The xylem parenchyma next a carinal canal is succeeded externally by phloem tissue, consisting of short protoplasmic cells and longer elements, without nuclei and poor in contents; the latter may be regarded as sieve-tubes. On either side of the phloem, the xylem occurs in two separate bands or groups of annular and reticulately thickened tracheids. In some species, e.g. EquisetuTTi xylochaetum Metten.^ and E. giganteum^ L. a native of South
. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. 106 PRACTICAL COURSE IN BOTANY. Fig. 122. — Internal structure of a pine stem, showing longitudinal section of a fibrovascular bundle through » medullary ray, sm, sm': s, tracheids; t, bordered pits, surface view; c, cambium; -a, sieve tubes; vt, sieve pits, analogous to the sieve plates in dicotyl stems. stem as it appears under the microscope, labeling correctly all the parts observed. Show the shape and relative size of the different cells. Com- pare your drawings with Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-practical-course-in-botany-with-especial-reference-to-its-bearings-on-agriculture-economics-and-sanitation-botany-106-practical-course-in-botany-fig-122-internal-structure-of-a-pine-stem-showing-longitudinal-section-of-a-fibrovascular-bundle-through-medullary-ray-sm-sm-s-tracheids-t-bordered-pits-surface-view-c-cambium-a-sieve-tubes-vt-sieve-pits-analogous-to-the-sieve-plates-in-dicotyl-stems-stem-as-it-appears-under-the-microscope-labeling-correctly-all-the-parts-observed-show-the-shape-and-relative-size-of-the-different-cells-com-pare-your-drawings-with-image232414181.htmlRMRE3AJD–. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. 106 PRACTICAL COURSE IN BOTANY. Fig. 122. — Internal structure of a pine stem, showing longitudinal section of a fibrovascular bundle through » medullary ray, sm, sm': s, tracheids; t, bordered pits, surface view; c, cambium; -a, sieve tubes; vt, sieve pits, analogous to the sieve plates in dicotyl stems. stem as it appears under the microscope, labeling correctly all the parts observed. Show the shape and relative size of the different cells. Com- pare your drawings with
. An introduction to vegetable physiology. Plant physiology. Pig. 43.—Longitudinal Section op Vascular Bundle oe Sunflower Stem. (After Prantl.) p', pith; s, s', spiral vessels; w', w, wood-cells; p, p, pitted vessels; c, cambium; st, st, sieve-tubes; ph, fibres; n, bundle sheath; c, cortex. off the limits of the cells, occupying the position of the original thin membrane, and looking as if it were the basis on which the thickening layers have been deposited. When a piece of tissue is warmed gently with a mixture of potassic chlorate and strong nitric acid, this layer dissolves and the cells b Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/an-introduction-to-vegetable-physiology-plant-physiology-pig-43longitudinal-section-op-vascular-bundle-oe-sunflower-stem-after-prantl-p-pith-s-s-spiral-vessels-w-w-wood-cells-p-p-pitted-vessels-c-cambium-st-st-sieve-tubes-ph-fibres-n-bundle-sheath-c-cortex-off-the-limits-of-the-cells-occupying-the-position-of-the-original-thin-membrane-and-looking-as-if-it-were-the-basis-on-which-the-thickening-layers-have-been-deposited-when-a-piece-of-tissue-is-warmed-gently-with-a-mixture-of-potassic-chlorate-and-strong-nitric-acid-this-layer-dissolves-and-the-cells-b-image232332257.htmlRMRDYJ4H–. An introduction to vegetable physiology. Plant physiology. Pig. 43.—Longitudinal Section op Vascular Bundle oe Sunflower Stem. (After Prantl.) p', pith; s, s', spiral vessels; w', w, wood-cells; p, p, pitted vessels; c, cambium; st, st, sieve-tubes; ph, fibres; n, bundle sheath; c, cortex. off the limits of the cells, occupying the position of the original thin membrane, and looking as if it were the basis on which the thickening layers have been deposited. When a piece of tissue is warmed gently with a mixture of potassic chlorate and strong nitric acid, this layer dissolves and the cells b
. The fungi which cause plant disease . Plant diseases; Fungi. 204 THE FUNGI WHICH CAUSE PLANT DISEASE Germ tubes from ascospores or conidia enter the cortex and develop a rich mycelimn in the sieve tubes and soft host. This advances most rapidly during the dormant period of the bast. White or yellow stromata the size of a pin- head appear and bear numerous conidia. Later come the red perithecia whose ascospores ripen in winter or spring. N. ribis (Tode) Rab. Fig. 144.—n. ipo- Cespitose, Stroma compact; perithecia sub- of perithecia. globose, smooth; ostiole papillate; asci subclavate, After H Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-fungi-which-cause-plant-disease-plant-diseases-fungi-204-the-fungi-which-cause-plant-disease-germ-tubes-from-ascospores-or-conidia-enter-the-cortex-and-develop-a-rich-mycelimn-in-the-sieve-tubes-and-soft-host-this-advances-most-rapidly-during-the-dormant-period-of-the-bast-white-or-yellow-stromata-the-size-of-a-pin-head-appear-and-bear-numerous-conidia-later-come-the-red-perithecia-whose-ascospores-ripen-in-winter-or-spring-n-ribis-tode-rab-fig-144n-ipo-cespitose-stroma-compact-perithecia-sub-of-perithecia-globose-smooth-ostiole-papillate-asci-subclavate-after-h-image232019873.htmlRMRDDBM1–. The fungi which cause plant disease . Plant diseases; Fungi. 204 THE FUNGI WHICH CAUSE PLANT DISEASE Germ tubes from ascospores or conidia enter the cortex and develop a rich mycelimn in the sieve tubes and soft host. This advances most rapidly during the dormant period of the bast. White or yellow stromata the size of a pin- head appear and bear numerous conidia. Later come the red perithecia whose ascospores ripen in winter or spring. N. ribis (Tode) Rab. Fig. 144.—n. ipo- Cespitose, Stroma compact; perithecia sub- of perithecia. globose, smooth; ostiole papillate; asci subclavate, After H
. Botany for high schools and colleges. Botany. 110 BOTANY. differentiateJ, being composed of parenchyma and poorly developed sieve tubes (s, Fig. 97). The whole bundle is sur- rounded, as in Pteris aquilina, by a bundle sheath {u, Fig. 97). In the outer part of the mass of scalariform tissue are a few narrow spiral vessels {sp, sp, Fig, 97), but they are- not sufficiently numerous to constitute a ring or layer. 138.âIn the root of Adiantum Moritzianum the bundle consists of a cen- tral plate of tra- cheary tissue {pr, â Fig. 98), with a, mass of sieve tissue on each side of but not quite enve Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/botany-for-high-schools-and-colleges-botany-110-botany-differentiatej-being-composed-of-parenchyma-and-poorly-developed-sieve-tubes-s-fig-97-the-whole-bundle-is-sur-rounded-as-in-pteris-aquilina-by-a-bundle-sheath-u-fig-97-in-the-outer-part-of-the-mass-of-scalariform-tissue-are-a-few-narrow-spiral-vessels-sp-sp-fig-97-but-they-are-not-sufficiently-numerous-to-constitute-a-ring-or-layer-138in-the-root-of-adiantum-moritzianum-the-bundle-consists-of-a-cen-tral-plate-of-tra-cheary-tissue-pr-fig-98-with-a-mass-of-sieve-tissue-on-each-side-of-but-not-quite-enve-image232272154.htmlRMRDTWE2–. Botany for high schools and colleges. Botany. 110 BOTANY. differentiateJ, being composed of parenchyma and poorly developed sieve tubes (s, Fig. 97). The whole bundle is sur- rounded, as in Pteris aquilina, by a bundle sheath {u, Fig. 97). In the outer part of the mass of scalariform tissue are a few narrow spiral vessels {sp, sp, Fig, 97), but they are- not sufficiently numerous to constitute a ring or layer. 138.âIn the root of Adiantum Moritzianum the bundle consists of a cen- tral plate of tra- cheary tissue {pr, â Fig. 98), with a, mass of sieve tissue on each side of but not quite enve
. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/pharmaceutical-botany-botany-botany-medical-fig-6closed-bundle-of-stem-of-zea-mays-vg-bundle-sheath-l-inter-cellular-space-a-ring-from-an-annular-tracheal-tube-sp-spiral-tracheal-tube-m-pitted-vessels-v-sieve-tubes-s-companion-cells-cp-crushed-primary-sieve-tubes-f-thjn-walled-parenchyma-of-the-ground-or-fundamental-tissue-from-sayre-after-strasburger-fig-7transverse-section-of-a-concentric-bundle-from-the-rhizome-of-iris-xylem-surrounding-the-phloem-i-tracheae-t-protoxylem-s-sieve-tubes-g-companion-cells-of-the-internal-phloem-portion-from-sayre-af-image232083752.htmlRMRDG95C–. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af
. Botany for high schools and colleges. Botany. no BOTANY. differentiate J, being composed of parenchyma and poorly developed sieve tubes {s, Pig. 97). The whole bundle is sur- rounded, as in Pteris aquilina, by a bundle sheath {u, Pig. 97). In the outer part of the mass of scalariform tissue are a few narrow spiral vessels {sp, sp, Pig. 97), but they are not sufficiently numerous to constitute a ring or layer. 138.âIn the root of Adiantum Moritzianum the bundle consists of a cen- tral plate of tra- cheary tissue {pr, Pig. 98), with a mass of sieve tissue on each side of but not quite envelopi Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/botany-for-high-schools-and-colleges-botany-no-botany-differentiate-j-being-composed-of-parenchyma-and-poorly-developed-sieve-tubes-s-pig-97-the-whole-bundle-is-sur-rounded-as-in-pteris-aquilina-by-a-bundle-sheath-u-pig-97-in-the-outer-part-of-the-mass-of-scalariform-tissue-are-a-few-narrow-spiral-vessels-sp-sp-pig-97-but-they-are-not-sufficiently-numerous-to-constitute-a-ring-or-layer-138in-the-root-of-adiantum-moritzianum-the-bundle-consists-of-a-cen-tral-plate-of-tra-cheary-tissue-pr-pig-98-with-a-mass-of-sieve-tissue-on-each-side-of-but-not-quite-envelopi-image232282515.htmlRMRDWAM3–. Botany for high schools and colleges. Botany. no BOTANY. differentiate J, being composed of parenchyma and poorly developed sieve tubes {s, Pig. 97). The whole bundle is sur- rounded, as in Pteris aquilina, by a bundle sheath {u, Pig. 97). In the outer part of the mass of scalariform tissue are a few narrow spiral vessels {sp, sp, Pig. 97), but they are not sufficiently numerous to constitute a ring or layer. 138.âIn the root of Adiantum Moritzianum the bundle consists of a cen- tral plate of tra- cheary tissue {pr, Pig. 98), with a mass of sieve tissue on each side of but not quite envelopi
. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. SIEVE.TVBES OF CRYPTOGAMS. I»I on one Fig. 78. —Encephalartos pungens. Bast of an old stem. Part of the radial wall of a sieve-tube (375). permeability of the plates are not callous. Their pores, as far as they can be recognised, are very narrow and round; and in Marsilia, according to- Russow, very numerous plate; in the cases investigated by me (Pteris aquilina, Cyathea, Alsophila spec, Osmunda) they are less numerous, and relatively far distant from one another. , The wall of the tubes is thi Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/comparative-anatomy-of-the-vegetative-organs-of-the-phanerogams-and-ferns-plant-anatomy-ferns-sievetvbes-of-cryptogams-ii-on-one-fig-78-encephalartos-pungens-bast-of-an-old-stem-part-of-the-radial-wall-of-a-sieve-tube-375-permeability-of-the-plates-are-not-callous-their-pores-as-far-as-they-can-be-recognised-are-very-narrow-and-round-and-in-marsilia-according-to-russow-very-numerous-plate-in-the-cases-investigated-by-me-pteris-aquilina-cyathea-alsophila-spec-osmunda-they-are-less-numerous-and-relatively-far-distant-from-one-another-the-wall-of-the-tubes-is-thi-image232415845.htmlRMRE3CNW–. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. SIEVE.TVBES OF CRYPTOGAMS. I»I on one Fig. 78. —Encephalartos pungens. Bast of an old stem. Part of the radial wall of a sieve-tube (375). permeability of the plates are not callous. Their pores, as far as they can be recognised, are very narrow and round; and in Marsilia, according to- Russow, very numerous plate; in the cases investigated by me (Pteris aquilina, Cyathea, Alsophila spec, Osmunda) they are less numerous, and relatively far distant from one another. , The wall of the tubes is thi
. Botany for high schools and colleges. Botany. THE PRINCIPAL TISSUES. 81 Eehinocystis, Ecbalium, Vitis, Bignonia, and Calamus Botang j also Abies pectinata, Larix, Juniperus, Sequoia, and Ginkgo; also Pteris, Osmunda, Equisetum, and Lycopodium. (b) By making repeated horizontal sections the horizontal sieve discs may be found and studied. (c) Alcoholic specimens afford much more satisfactory results than fresh ones ; especially is this the case with the more succulent plants.. Fig. 71.—Sieve tissue of Pteris aquilina. A, end of a sieve tube isolated by macer- ation : B. portions of two tubes Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/botany-for-high-schools-and-colleges-botany-the-principal-tissues-81-eehinocystis-ecbalium-vitis-bignonia-and-calamus-botang-j-also-abies-pectinata-larix-juniperus-sequoia-and-ginkgo-also-pteris-osmunda-equisetum-and-lycopodium-b-by-making-repeated-horizontal-sections-the-horizontal-sieve-discs-may-be-found-and-studied-c-alcoholic-specimens-afford-much-more-satisfactory-results-than-fresh-ones-especially-is-this-the-case-with-the-more-succulent-plants-fig-71sieve-tissue-of-pteris-aquilina-a-end-of-a-sieve-tube-isolated-by-macer-ation-b-portions-of-two-tubes-image232282729.htmlRMRDWAYN–. Botany for high schools and colleges. Botany. THE PRINCIPAL TISSUES. 81 Eehinocystis, Ecbalium, Vitis, Bignonia, and Calamus Botang j also Abies pectinata, Larix, Juniperus, Sequoia, and Ginkgo; also Pteris, Osmunda, Equisetum, and Lycopodium. (b) By making repeated horizontal sections the horizontal sieve discs may be found and studied. (c) Alcoholic specimens afford much more satisfactory results than fresh ones ; especially is this the case with the more succulent plants.. Fig. 71.—Sieve tissue of Pteris aquilina. A, end of a sieve tube isolated by macer- ation : B. portions of two tubes
. A handbook of cryptogamic botany. Cryptogams. Fig. 217.—Longitudinal section ol MacrocysHs ^yrifera, showing sieve-tubes, /, and sieve-plates, s, with callus (x 300). (After Oliver.). Pig. 216.—Chorda Jilum Stackh. a, uppermost and lowermost portion of frond (natural size); h. transverse section, showing^ differentiation into cortical and epidermal layers (x 200). (After Hauck.) R 2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the origin Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-handbook-of-cryptogamic-botany-cryptogams-fig-217longitudinal-section-ol-macrocyshs-yrifera-showing-sieve-tubes-and-sieve-plates-s-with-callus-x-300-after-oliver-pig-216chorda-jilum-stackh-a-uppermost-and-lowermost-portion-of-frond-natural-size-h-transverse-section-showing-differentiation-into-cortical-and-epidermal-layers-x-200-after-hauck-r-2-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-origin-image232382823.htmlRMRE1XJF–. A handbook of cryptogamic botany. Cryptogams. Fig. 217.—Longitudinal section ol MacrocysHs ^yrifera, showing sieve-tubes, /, and sieve-plates, s, with callus (x 300). (After Oliver.). Pig. 216.—Chorda Jilum Stackh. a, uppermost and lowermost portion of frond (natural size); h. transverse section, showing^ differentiation into cortical and epidermal layers (x 200). (After Hauck.) R 2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the origin
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