. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 318 USTILAGINEAE. the plant as a whole did not seem to be much affected. On the other hand, a case was observed near Munich where a large plot of violets was completely killed out in a few years by this fungus. The anatomical changes induced on Viola odoraia were investigated by Wakker^ with the following results: a swelling of the stems, leaves, and flower-stalks occurred, often accom- panied by considerable twisti
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 318 USTILAGINEAE. the plant as a whole did not seem to be much affected. On the other hand, a case was observed near Munich where a large plot of violets was completely killed out in a few years by this fungus. The anatomical changes induced on Viola odoraia were investigated by Wakker^ with the following results: a swelling of the stems, leaves, and flower-stalks occurred, often accom- panied by considerable twisting and rupture of the epidermis; these changes were not caused by any enlargement of cells, but. Fig. 174.— UrocystU violae on Viola. Smiit-pustules are present on leaf .stalks and fruit-stalks, accompanied by malformation, (v. Tubeuf phot) the cambium remained longer active in the stem, and a secondary division of rind-parenchyma or mesophyll could be observed, along with a disappearance of intercellular spaces; accessory vascular bundles were formed, but the secondary vessels remained incompletely developed. In short, new growth occurred, not in the earlier stages of the host's life, but in the adult. Especially noteworthy is the formation of a small-celled tissue resulting from cell-division in the rind-parenchyma and the mesophyll; this serves as a nutritive tissue for the fungus, 1 Wakker, Pringsheim's Jahrbttch, 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 Tubeuf, Karl, freiherr von, 1862-1941; Smith, William G. London ; New York [etc. ] : Longmans, Green & co.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
