. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. lOO MYCOLOGY black mould to spread rapidly and it sometimes chokes out other moulds growing in competition with it on the same nutritive medium. In 1818, on account of this method of growth, it was named by Ehrenberg Mucor stolonifer. Related to this fungus is one named Rhizopus ory- zem which grows in Ragi. The fungus Phycornyces nitens is found in empty oil casks, on oil cakes and in concentrated fodder. It puts forth stiff sporangiophores 7 to 30 cm. long and 50 to 150^ in diameter w
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. lOO MYCOLOGY black mould to spread rapidly and it sometimes chokes out other moulds growing in competition with it on the same nutritive medium. In 1818, on account of this method of growth, it was named by Ehrenberg Mucor stolonifer. Related to this fungus is one named Rhizopus ory- zem which grows in Ragi. The fungus Phycornyces nitens is found in empty oil casks, on oil cakes and in concentrated fodder. It puts forth stiff sporangiophores 7 to 30 cm. long and 50 to 150^ in diameter which bear at the summit black globular sporangia to mm. in diame- ter, filled with yellow-brown, thick-walled endospores, 16 to 30/1 long and 8 to 15^ broad. Its zygospores are 300^ broad and their. Fig. 31.—Black Mould, Rhizopus nigricans. A, Mature plant showing rhizoidal hyphae (myc); stoloniferous hypha {st)\ sporangiophores {sph); sporangia (sp). B, Younger cluster of sporangiophores and sporangia. (After Gager.) borders are covered with many forked projecting hyphae known as suspensoria. Recently H. Burgeff' has studied the variability, sex- uality and heredity of Phycomyces nitens and has brought his cultural investigations into line with the recent developments of cytology and genetics. His paper should be read by all students, who may be interested in the extension of the methods of genetics into an investigation of the lower plants. The genus Absidia includes five species. In these fungi the suspen- sors are borne at the base of the two gamete cells which fuse to form the zygospore, which when mature is covered by a basket-Uke covering of ' BuRGEPF, H.: Untersuchungen iiber Variabilitat, Sexualitat und Erblichkeit ha. Phycomyces nitens Kuntze. Flora, Band 108: 353-448; review by G. V. Ubisch (Dahlem) in Botanisches Centralblatt, Band 128, Nr. 23: 630-632, Please note that these images are extracted from scanned page images that may have been digitall
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1917
