Document Detail


Light is required for conidiation in Aspergillus nidulans.
MedLine Citation:
PMID:  2253875     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Light is necessary for asexual sporulation in Aspergillus nidulans but will elicit conidiation only if irradiation occurs during a critical period of development. We show that conidiation is induced by red light and suppressed by an immediate shift to far red light. Conidiation-specific gene functions switch from light-independent to light-dependent activities coincident with the expression of brlA, a regulator of conidiophore development. We also show that light dependence is abolished by a mutation in the velvet gene, which allows conidiation to occur in the absence of light. We propose that the initiation of late gene expression is regulated by velvet and controlled by a red light photoreceptor, whose properties are reminiscent of phytochrome-mediated responses observed in higher plants.
Authors:
J L Mooney; L N Yager
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Genes & development     Volume:  4     ISSN:  0890-9369     ISO Abbreviation:  Genes Dev.     Publication Date:  1990 Sep 
Date Detail:
Created Date:  1991-01-23     Completed Date:  1991-01-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8711660     Medline TA:  Genes Dev     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1473-82     Citation Subset:  IM    
Affiliation:
Department of Biology, Temple University, Philadelphia, Pennsylvania 19122.
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MeSH Terms
Descriptor/Qualifier:
Alleles
Aspergillus nidulans / genetics,  physiology*
Gene Expression Regulation, Fungal / genetics
Genes, Fungal / physiology*
Light
Spores, Fungal / radiation effects
Transcription, Genetic

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