Isolation and characterization of light-insensitive mutants or Neurospora crassa

As part of a genetic analysis of blue light photoreception in Neurospora, three mutants were isolated that do not exhibit photosuppression of circadian conidiation, i.e., they show periodic conidiation in constant light. The mutations have been given the designations lis-1, lis-2 and lis-3 ("li...

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Bibliographic Details
Published in:Genetics (Austin) 1983-05, Vol.104 (1), p.11-21
Main Authors: Paietta, J, Sargent, M.L
Format: Article
Language:English
Subjects:
Circadian Rhythm
fungi
Investigations
Light
Mutation
Neurospora - genetics
Neurospora crassa
Neurospora crassa - genetics
Neurospora crassa - growth & development
Phenotype
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Summary:As part of a genetic analysis of blue light photoreception in Neurospora, three mutants were isolated that do not exhibit photosuppression of circadian conidiation, i.e., they show periodic conidiation in constant light. The mutations have been given the designations lis-1, lis-2 and lis-3 ("light insensitive"). The three mutations segregate as single nuclear genes, are nonallelic and are recessive to wild type in heterokaryon tests. The linkage groups of the mutations are as follows: lis-1, I; lis-2, VI; and lis-3, V. The light -insensitive phenotype of the mutants is restricted to the photosuppression response; other responses such as photoinduced phase shifting of the conidiation rhythm and photoinduced carotenogenesis are not altered. The physiological or biochemical defects of the mutants have not been established, but they are not similar to previous reported cases (i.e., rib and poky) in which a reduction in light sensitivity has been observed.
ISSN:0016-6731
1943-2631
1943-2631
DOI:10.1093/genetics/104.1.11