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Nuclear divisions in the ascus and ascospores of Melanospora zamiae

Published online by Cambridge University Press:  01 December 1997

T. K. GOH  and
R. T. HANLIN
T. K. GOH
Affiliation:
Department of Ecology and Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong
R. T. HANLIN
Affiliation:
Department of Plant Pathology, The University of Georgia, Athens, GA 30602, U.S.A.
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Abstract

In Melanospora zamiae a total of five nuclear divisions took place during ascosporogenesis. The first and second divisions were meiotic in which the single diploid nucleus divided into four haploid nuclei. The mitosis that followed gave rise to eight nuclei which characteristically assumed a 1[ratio ]4[ratio ]3 (apical[ratio ]middle[ratio ]basal) spacing in the clavate ascus. After ascospore delimitation, each nucleus in the young ascospore underwent two successive mitoses producing four haploid nuclei in each spore. Equatorial arrangement of these nuclei was observed in the mature ascospores.

Type
Research Article
Information
Mycological Research , Volume 101 , Issue 12 , December 1997 , pp. 1511 - 1514
Copyright
The British Mycological Society 1997

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