. Comparative morphology of Fungi. Fungi. Fig. —Ascobolus carbonarius. Development of ascogonia. Dodge, 1912.) (X 265; after B. O. that, on the one hand, the ascogonia are still adjusted for cross fertiliza- tion, while on the other hand, the antheridia have disappeared, so that this cross fertilization may only occur by a substitute. It is also charac- teristic that this cross fertilization, as in the Pyronemaceae, is not obliga- tory but that when it is absent the ascogonia may develop independently. It is also noteworthy that this species is heterothallic (Betts, 1926). Single spore cu
. Comparative morphology of Fungi. Fungi. Fig. —Ascobolus carbonarius. Development of ascogonia. Dodge, 1912.) (X 265; after B. O. that, on the one hand, the ascogonia are still adjusted for cross fertiliza- tion, while on the other hand, the antheridia have disappeared, so that this cross fertilization may only occur by a substitute. It is also charac- teristic that this cross fertilization, as in the Pyronemaceae, is not obliga- tory but that when it is absent the ascogonia may develop independently. It is also noteworthy that this species is heterothallic (Betts, 1926). Single spore cultures fail to produce apothecia. This sexual differentia- tion takes place in the ascus, since cultures from the spores of a single ascus gave equal numbers of -f- and — mycelia. This cross fertilization, since of the numerous forms studied only A. carbonarius shows the transitional type, appears to have been rapidly lost or is only realized in a few cases as conidial copulation. In the large majority of the previously investigated forms, it is replaced by true deuterogamous 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
