ibclogo XVI International Botanical Congess


Abstract Number: 3515
Poster No. = 172


PRELIMINARY SYSTEMATIC STUDIES ON PODOSTROMA,


H.L. Chamberlain*, G.J. Samuels#, E.L. Stewart*(*Dept. Plant Pathology, Penn State, Buckhout Lab, University Park, PA 16802, #USDA-ARS, Systematic Botany and Mycology Lab, Beltsville, MD 20705)


Podostroma was described as a genus in the Hypocreales having ascospore characters of Hypocrea, i.e. bicellular ascospores that disarticulate at the septum, but differing from the type species, H. rufa, in having a club-shaped or stalked stroma. The generic limits of Podostroma defy definition given that stroma morphology is the only distinguishing character. The stroma of the type species, P. alutacea, is a simple, erect club in which perithecia are embedded. The variation in depth to which perithecia are embedded and their location on the stroma has not been well-documented for P. alutacea . The anamorphs of Podostroma are Trichoderma, as in typical Hypocrea. Morphometric analysis will be conducted to more clearly define the relationship of P. alutacea to Hypocrea rufa.


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