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Microcyclic microconidiation inNeurospora crassa

Authors
Journal
Experimental Mycology
0147-5975
Publisher
Elsevier
Publication Date
Volume
1
Issue
1
Identifiers
DOI: 10.1016/s0147-5975(77)80030-3

Abstract

Microcyclic microconidiation (microconidiation without mycelial phase) could be obtained in Neurospora crassa by treating the microconidia of the fluffy mutant at 46°C for 24–48 h on phosphate buffer and transferring them to 25°C for 96 h. The successive stages of this shortened differentiation are described with both optical and electron microscopy. Microcyclic microconidiation appears to depend upon an arrest of apical growth followed by a lateral differentiation of microconidiogenous phialides. The most striking ultrastructural changes in heat-treated microconidia are their numerous vacuoles with dense inclusions which disappear during germination. This type of microcycle could also be obtained using wild-type microconidia selectively produced by an iodoacetate treatment.

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