. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 186. Endofhyllum Setnpervivi'L&v.; spores giving rise to basidia; both after Hoffmann. (fig. 186); its two nuclei fuse (fig. 187), its contents are extruded as a pro- mycelium, two successive nuclear divisions occur, cross walls appear and four basidiospores are produced, which, in due course, give rise to a uninucleate mycelium. The sporophytic stage thus endures only from the fusion of the fertile cells until the germination of the spores which they produce. Incidentally these observations in the case of Kunkelia nitens have de
. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 186. Endofhyllum Setnpervivi'L&v.; spores giving rise to basidia; both after Hoffmann. (fig. 186); its two nuclei fuse (fig. 187), its contents are extruded as a pro- mycelium, two successive nuclear divisions occur, cross walls appear and four basidiospores are produced, which, in due course, give rise to a uninucleate mycelium. The sporophytic stage thus endures only from the fusion of the fertile cells until the germination of the spores which they produce. Incidentally these observations in the case of Kunkelia nitens have demonstrated that the caeoma of this fungus is not a stage in the life-history of the teleutospore-producing Puccinia Peckiana on the same host, for the mycelial cells olP. Peckiana are binucleate and the teleutospores germinate in the usual way. The development of an apo- gamous aecidium has been ob- served by Moreau in a variety of Endophyllwn Euphorbiae on Euphorbia sylvatica; here the basal cells, aecidiospores and cells of the pseudoperidium are uninucleate throughout their development, the aecidiospore germinates to form a promy- celium of three or four cells ^''f }^1: Endophyllum Sempervivil^v.; a. nuclear i,i,» ^. ,^, ^L ^ fusion m spore; b. synapsis m fusion nucleus; after and neither nuclear association 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 Gwynne-Vaughan, Helen Charlotte Isabella (Fraser) Dame, 1879-. Cambridge [Eng] University Press
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfungi, bookyear1922
