. A monograph of the British Uredineae and Ustilagineae, with an account of their biology including the methods of observing the germination of their spores and of their experimental culture. Smut fungi; Rust fungi; Smut diseases; Fungi. 42 British Uredinecs and Ustilagine<2. like Puccinia spores, but have, in the European species, generally two germ-pores in each cell, and these are placed. Fig. 3.—Chrysomyxa rJwdodendri. Section of spore-bed showing the compound teleu- tospores (a), one of which is in the act of germination, having emitted a promycelium (^) from upper corner of its_ super
. A monograph of the British Uredineae and Ustilagineae, with an account of their biology including the methods of observing the germination of their spores and of their experimental culture. Smut fungi; Rust fungi; Smut diseases; Fungi. 42 British Uredinecs and Ustilagine<2. like Puccinia spores, but have, in the European species, generally two germ-pores in each cell, and these are placed. Fig. 3.—Chrysomyxa rJwdodendri. Section of spore-bed showing the compound teleu- tospores (a), one of which is in the act of germination, having emitted a promycelium (^) from upper corner of its_ superior compartment. In most of the other spores germination has commenced, if, The epidermal cells of the host-plant (i?. kirsuiuwi); m, mycelial hyphae. (De Bary.) at that end of the cell which is nearest the septum (Plate III. Figs. 22, 23 ; and Plate IV. Figs; 11, 15, and 14). Germination.—The period at which germination takes place in teleutospores is subject to variation with the diiiferent species of Uredines. In the greater number of cases this process ensues only after the teleutospore has remained for some considerable time in a state of qui- escence or rest. Generally this resting period extends from the summer or autumn of one year until the ensuing spring, corresponding, in fact, with the conditions of the host-plant, which of course, in the case of deciduous plants, is without suitable foliage during the winter months into which the fungus can gain an entrance. On the other hand, there are several species in which teleutospores germinate as soon as they are mature, without undergoing any resting period (Leptopuccinia, Lepturomyces); while there are others which have only a very short resting period {P. rubigo-. 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 Plowright, Charles Bagge, 1849-1910.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfungi, booksubjectsmu
