. Comparative morphology of Fungi. Fungi. Fig. 221.—Pyronema confluens. Development of ascogenous hyphae. 1. The asco- genous hyphae are aseptate and have numerous dicaryons. 2. Development of hooks. (After Claussen, 1912.) In P. domesticum (Tandy, 1927) the first and often the third division in the ascus is a meiosis; both diploid and tetraploid nuclei being found in the young ascus. The development of this species follows closely that reported by Harper for P. confluens. The sexual development of Pyronema is connected directly to that of Monascus among the Plectascales. As there the female s
. Comparative morphology of Fungi. Fungi. Fig. 221.—Pyronema confluens. Development of ascogenous hyphae. 1. The asco- genous hyphae are aseptate and have numerous dicaryons. 2. Development of hooks. (After Claussen, 1912.) In P. domesticum (Tandy, 1927) the first and often the third division in the ascus is a meiosis; both diploid and tetraploid nuclei being found in the young ascus. The development of this species follows closely that reported by Harper for P. confluens. The sexual development of Pyronema is connected directly to that of Monascus among the Plectascales. As there the female sexual apparatus is divided into a unicellular ascogonium and an unicellular trichogyne, and as there is a plurality of sexual acts, there follows a multiple plasmog- amy between the male and female gametangial nuclei. It is nevertheless characteristic of Pyronema confluens (and the Pezizales generally) that its ontogeny can take place in this manner only when definite nutritive relations occur. If these are absent, the antheridium still may be formed. 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 Gäumann, Ernst Albert, 1893-1963; Dodge, Carroll William, 1895-. New York [etc. ] McGraw-Hill Book Company, Inc.
Size: 1060px × 2358px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublishern, booksubjectfungi
