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Ascocarpic Centrum Ontogeny of Species of Hypodermataceae of Conifers
C. C. Gordon
American Journal of Botany
Vol. 53, No. 4 (Apr., 1966), pp. 319-327
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2439871
Page Count: 9
You can always find the topics here!Topics: Hyphae, Asci, Ontogeny, Herbaria, Cell nucleus, Epidermis, Immatures, Species, Botany, Forest service
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Studies on the morphology of the ascocarps of 39 species of Hypodermataceae revealed several previously unknown cytological features. Two basic and one intermediate type of centrum ontogeny are discussed. Ascal initiation within Type I centrum occurs in the basal cells of the pseudoparaphyses and involves anastomoses, while ascal initiation within Type II occurs in cells of a plectenchymatous centrum, with no visible anastomosing in the ascocarp. There is frequent anastomosing between vegetative hyphae well in advance of initiation of the ascocarp. Ascal initiation in the intermediate type has ontogenetic sequences similar to those in Types I and II.
American Journal of Botany © 1966 Botanical Society of America, Inc.