Are carotenoids the blue-light photoreceptor in the photoinduction of protoperithecia in Neurospora crassa?

A triple albino mutant of Neurospora crassa with a measured content of carotenoids absorbing at 470 nm less than 0.5% of that of the wild type (calculated value less than 8·10-4%) had the same threshold for photoinduction of protoperithecia as the wild type when illuminated with monochromatic light...

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Bibliographic Details
Published in:Planta 1986-05, Vol.168 (1), p.56-60
Main Author: Russo, V.E.A
Format: Article
Language:English
Subjects:
Absorption spectra
Action of physical and chemical agents
Albinism
Alleles
Biological and medical sciences
blue light
Carotenoids
Chromophores
Fluence
Fundamental and applied biological sciences. Psychology
Microbiology
Mycelium
Mycology
Neurospora
Neurospora crassa
Photoreceptors
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Summary:A triple albino mutant of Neurospora crassa with a measured content of carotenoids absorbing at 470 nm less than 0.5% of that of the wild type (calculated value less than 8·10-4%) had the same threshold for photoinduction of protoperithecia as the wild type when illuminated with monochromatic light at 471 nm. This is strong evidence against the hypothesis that the bulk of carotenoids are the blue-light photoreceptor for this phenomenon. However, it is impossible to exclude traces of carotenoids acting as the photoreceptor at less than 3·10-12 M in a very efficient sensory transduction chain.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00407009