. Comparative morphology of Fungi. Fungi. Fig. 227.—Ascobolus citrinus. Development of sexual organs. 1923.) (X 725; after Schweizer, sheath and supporting tissue. In this condition, the fructification is about a quarter of a millimeter in size. Through pores, the cells of the ascogonium come into open communi- cation so that the nuclei of the other ascogonial cells migrate toward the large central cell. There they pair and pass out into the ascogenous hyphae, which radiate from this central cell only (Fig. 227, 5). The nuclei remaining behind degenerate. In contrast to Pyronema confluens, the
. Comparative morphology of Fungi. Fungi. Fig. 227.—Ascobolus citrinus. Development of sexual organs. 1923.) (X 725; after Schweizer, sheath and supporting tissue. In this condition, the fructification is about a quarter of a millimeter in size. Through pores, the cells of the ascogonium come into open communi- cation so that the nuclei of the other ascogonial cells migrate toward the large central cell. There they pair and pass out into the ascogenous hyphae, which radiate from this central cell only (Fig. 227, 5). The nuclei remaining behind degenerate. In contrast to Pyronema confluens, therefore, the sexuality of Ascobolus citrinus has been shifted toward the simpler Hypocreales, like that of Poly stigma rubrum. Instead of amphi- mictic fertilization, there occurs parthenogamy, a cell fusion with the female organ. A. stercorarius (Welsford, 1907), A. glaber (Dangeard, 1907), A. immersus (Ramlow, 1915), A. Winteri (B. O. Dodge, 1912), Ascophanus carneus (Cutting, 1909; Ramlow, 1915) correspond essentially with this. 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.
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishern, booksubjectfungi
