. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 544 THE PATHOGENIC ALGAE. forme (the earlier name); he also believes that it exists on damp soil and independently of Gunnera. Anabaena cycadearum (Reinke).^ [Nostoc commune (Schneider).^] The following account of this species is taken from De Bary.' Seedlings of Cycadeae have a thick tap-root which branches in the soil; from the proximal end of the primary root a few pairs of root-branches grow up perpen- dicularly
![. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 544 THE PATHOGENIC ALGAE. forme (the earlier name); he also believes that it exists on damp soil and independently of Gunnera. Anabaena cycadearum (Reinke).^ [Nostoc commune (Schneider).^] The following account of this species is taken from De Bary.' Seedlings of Cycadeae have a thick tap-root which branches in the soil; from the proximal end of the primary root a few pairs of root-branches grow up perpen- dicularly Stock Photo](https://c8.alamy.com/comp/RDCXP0/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-544-the-pathogenic-algae-forme-the-earlier-name-he-also-believes-that-it-exists-on-damp-soil-and-independently-of-gunnera-anabaena-cycadearum-reinke-nostoc-commune-schneider-the-following-account-of-this-species-is-taken-from-de-bary-seedlings-of-cycadeae-have-a-thick-tap-root-which-branches-in-the-soil-from-the-proximal-end-of-the-primary-root-a-few-pairs-of-root-branches-grow-up-perpen-dicularly-RDCXP0.jpg)
Image details
Contributor:
The Book Worm / Alamy Stock PhotoImage ID:
RDCXP0File size:
7.1 MB (329.5 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
1860 x 1343 px | 31.5 x 22.7 cm | 12.4 x 9 inches | 150dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 544 THE PATHOGENIC ALGAE. forme (the earlier name); he also believes that it exists on damp soil and independently of Gunnera. Anabaena cycadearum (Reinke).^ [Nostoc commune (Schneider).^] The following account of this species is taken from De Bary.' Seedlings of Cycadeae have a thick tap-root which branches in the soil; from the proximal end of the primary root a few pairs of root-branches grow up perpen- dicularly, and, after forking once or twice, their ends swell to form tubercles (Fig. 321). Similar clumps of forked twigs. Fig. m.âAnaJbaena cycadmrvim. Section of a Cycad-root, as in Fig. 321 A, and in the condition shown in the upper transverse section B of that figure. The J^ostoc-filaments crowd the intercellular spaces and cause alteration in shape and growth of the adjacent cells as shown, (v, Tubeuf deL) arise later on other branches which arise from the tap-root and spread over the surface of the ground. It is into these forked twigs that the Nostoc makes its way and causes the following chaiacteiistic alteration in their structure. A layer of parenchyma, which in normal roots does not differ from the surrounding compact polygonal tissue, becomes in attacked roots a definite zone round the axile vascular bundle. The zone consists of parenchymatous cells much elongated in one direction, and with their interspaces filled with masses of algal filaments (Fig. 322). In cross-sections of attacked roots the Nostoc 'Reinke, Botan. Zeitung, 1879, and Abhandlungen, 1873. - Schneider, Botanicnl Gazette, 1894, p. 25. â ''De Bary, Die Erscheinung der Symbiose, 1879, p. 14.. 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 original work