. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 314 USTILAGINEAE. epispore, and the clusters appear black or leaden-grey. Ger- mination as in Entyloma. Melanotaenium endoirenum (Unger) (Britain). This is found on Galium MoUiigo and G. verum. The mycelium permeates the whole intercellular system of the host, and is nourished by large tufted haustoria. The host-plants remain small, with shortened internodes, shrunk leaves, and undeveloped flowers. The spores occur
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 314 USTILAGINEAE. epispore, and the clusters appear black or leaden-grey. Ger- mination as in Entyloma. Melanotaenium endoirenum (Unger) (Britain). This is found on Galium MoUiigo and G. verum. The mycelium permeates the whole intercellular system of the host, and is nourished by large tufted haustoria. The host-plants remain small, with shortened internodes, shrunk leaves, and undeveloped flowers. The spores occur in patches in de- formed flowers, and on leaves and internodes. They are formed in summer, and by autumn are capable of germination in water; Woronin could not keep them alive over winter. On germination a bifur- cate promycelium is produced, one branch of which remains rudimen- tary, while the other grows on, and, if long, becomes divided by cross-septa. At its apex, a number of conidia arise, and, after many of them have fused in pairs, they germinate directly to a septate filament into which the plasma passes over (Fig. 171). Mel. caulium (Schneider) causes the stem of Linaria -vulgaris to swell up like a quill. Mel. cingens (Beck.) on Linaria genistifolia. According to Brefeld, this species only germinates after resting for four years, whereas Juel easily caused Mel. caulium to do so after a short Fio. 171.—Melanotaenium Germinating spores. One has already produced a promycelium with a wborl of five branches, of which two have fused. {After Woronin.) Urocystis. Spores massed into balls, consisting of several spores sur- rounded by smaller companion-cells incapable of germination. The central spores are clearly distinguished from the others by their larger size, darker colour, and thicker coat. The balls of spores are developed inside coils of hyphae, which become entwined together and swell up in a gelatinous manner. The central spores on germination gi
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
