Abstract
White collar (wc) mutants of Neurospora crassa are thought to be regulatory mutants blocked in the photoinduction of carotenogenesis. Eight new wc mutants have been isolated after UV mutagenesis; their morphology and linear growth rate are not altered, although blue light-induced carotenogenesis is completely blocked. All of the wc mutations fall into two complementation groups corresponding to the already-known wc-1 and wc-2 loci. It is shown that the wc mutations impair another blue light effect, the photoinduction of protoperithecia formation, as well as the low constitutive production of protoperithecia in the dark. These effects are not due to the lack of carotenoids since the albino mutants show a normal sexual development. The pleiotropic effects of the mutations in the wc genes indicate that they play a key role in the mechanisms of regulation of the blue light-induced responses of N. crassa.
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- De Fabo E. C., Harding R. W., Shropshire W. Action Spectrum between 260 and 800 Nanometers for the Photoinduction of Carotenoid Biosynthesis in Neurospora crassa. Plant Physiol. 1976 Mar;57(3):440–445. doi: 10.1104/pp.57.3.440. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Degli-Innocenti F., Chambers J. A., Russo V. E. Conidia induce the formation of protoperithecia in Neurospora crassa: further characterization of white collar mutants. J Bacteriol. 1984 Aug;159(2):808–810. doi: 10.1128/jb.159.2.808-810.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Harding R. W., Melles S. Genetic Analysis of Phototropism of Neurospora crassa Perithecial Beaks Using White Collar and Albino Mutants. Plant Physiol. 1983 Aug;72(4):996–1000. doi: 10.1104/pp.72.4.996. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Harding R. W., Mitchell H. K. The effect of cycloheximide on carotenoid biosynthesis in Neurospora crassa. Arch Biochem Biophys. 1968 Dec;128(3):814–818. doi: 10.1016/0003-9861(68)90091-x. [DOI] [PubMed] [Google Scholar]
- Harding R. W., Turner R. V. Photoregulation of the Carotenoid Biosynthetic Pathway in Albino and White Collar Mutants of Neurospora crassa. Plant Physiol. 1981 Sep;68(3):745–749. doi: 10.1104/pp.68.3.745. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Innocenti F. D., Pohl U., Russo V. E. Photoinduction of protoperithecia in Neurospora crassa by blue light. Photochem Photobiol. 1983 Jan;37(1):49–51. doi: 10.1111/j.1751-1097.1983.tb04432.x. [DOI] [PubMed] [Google Scholar]
- Perkins D. D., Radford A., Newmeyer D., Björkman M. Chromosomal loci of Neurospora crassa. Microbiol Rev. 1982 Dec;46(4):426–570. doi: 10.1128/mr.46.4.426-570.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sargent M. L., Briggs W. R. The effects of light on a circadian rhythm of conidiation in neurospora. Plant Physiol. 1967 Nov;42(11):1504–1510. doi: 10.1104/pp.42.11.1504. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sargent M. L., Kaltenborn S. H. Effects of medium composition and carbon dioxide on circadian conidiation in neurospora. Plant Physiol. 1972 Jul;50(1):171–175. doi: 10.1104/pp.50.1.171. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Subden R. E., Bobowski G. Evidence for actinomycin D inhibition of transcription of carotenoid loci in Neurospora. Experientia. 1973 Aug 15;29(8):965–967. doi: 10.1007/BF01930405. [DOI] [PubMed] [Google Scholar]
- ZALOKAR M. Biosynthesis of carotenoids in Neurospora; action spectrum of photoactivation. Arch Biochem Biophys. 1955 Jun;56(2):318–325. doi: 10.1016/0003-9861(55)90252-6. [DOI] [PubMed] [Google Scholar]