. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. 30 REACTION OF HOST TO PARASITIC ATTACK. Still more striking are certain structures resembling witches' brooms, which are produced on Thnj'opsis clolahrata in Japan, under the influence of the mycelium of Gacoma deformans (Fig. 8). These consist of leafless non-chlorophyllous axes, dichotomously branched, and with each branch ending in a disc. They arise from shoots or leaves of the Thiijojjsis
. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. 30 REACTION OF HOST TO PARASITIC ATTACK. Still more striking are certain structures resembling witches' brooms, which are produced on Thnj'opsis clolahrata in Japan, under the influence of the mycelium of Gacoma deformans (Fig. 8). These consist of leafless non-chlorophyllous axes, dichotomously branched, and with each branch ending in a disc. They arise from shoots or leaves of the Thiijojjsis where structures of the kind would never have arisen normally, and are wholly sub- servient to the reproduction of the fungus, which forms its sori under the epidermis of the terminal Fig. 8. â Caeoma defornians. The nest-like structures are much-branched, leafless shoots with each of their twigs ending in a caeoma-disc. (v. Tubeuf phot.) The galls produced by Ustilago Treuhii on Polygonum Saccha- lincnsc are particularly interesting. Here, as a result of the presence of the parasite, there are formed the so-called vegetative canker-galls, and in addition, the fruit-galls, new organs derived from lateral outgrowths of the host-plant, and of use only in the spore-formation of the Ustilago; they contain a special cai)illitium-like tissue, and serve exclusively for the shelter and distribution of the 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-. London Longman's, Green
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
