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Updated: 18-07-12 | ||||
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STUDIES ON SORDARIA HUMANA (FUCKEL) WINTER: THE CYTOLOGY OF ASCUS DEVELOPMENT AND DEVELOPMENTAL MORPHOLOGY OF PERITHECIUM
Abstract: Studies on the cytology and developmental morphology of Sordaria humana revealed that the ascognia arise as coiled multinucleate side branches without trichogyne. No antheridium was observed though anastomoses were noted between somatic hyphae. Thearchicarp consists of 4-12 binucleated cells. The peridium and sterile elements of the centrum develop from the hyphae arising from the subtending hypha of the ascogonium. The peridium consists of an outer ex- operidium of dark, thick-walled cell; and an inner endoperidum of hyaline, thin-walled cells. A third layer, the perilocular layer, is instrumental in the formation of the neck and ostiole, which develops schizogenously. Ascogenous hyphae develop from the cells of the ascogonium. The asci develop from the ascogenous hyphae in the usual m nner. The centrum is "Diaporthe” type in the sense of Parguey-Leduc, the asci forming a fascicle on a ridge at the base of the centrum.
Department of Plant Pathology, West Pakistan Agricultural University, Lyallpur |
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