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Homokaryotic Fruiting in the Bipolar-Incompatible Ascomycete Podospora anserina

Karl Esser and Dieter Graw
Mycologia
Vol. 72, No. 3 (May - Jun., 1980), pp. 534-541
DOI: 10.2307/3759527
Stable URL: http://www.jstor.org/stable/3759527
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Homokaryotic Fruiting in the Bipolar-Incompatible Ascomycete Podospora anserina
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Abstract

The gene vacua (va) is a threshold gene which causes the transition from female sex organs (protoperithecia) to fruit bodies (perithecia). It does not effect spore formation. Vacua perithecia are sterile and contain only proliferating paraphyses. Thus va acts independently of the mating type genes (+ and -) which block fertilization in homokaryons and the completion of the sexual cycle. The mating type and vacua genes are not linked. These findings allow the conclusion that, as in many higher Basidiomycetes, morphogenesis in Podospora is not related to the sexual cycle. This has a practical implication, since in many fungi of industrial value the production phase is correlated with morphogenetic alterations.

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