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BLUE LIGHT RESPONSES IN NITRATE REDUCTASE MUTANTS OF NEUROSPORA CRASSA
Author(s) -
Paietta John,
Sargent Malcolm L.
Publication year - 1982
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1982.tb02658.x
Subject(s) - neurospora crassa , nitrate reductase , nitrate , conidiation , neurospora , ammonium , mutant , biochemistry , biology , arginine , enzyme , chemistry , ecology , amino acid , organic chemistry , gene
— The role of nitrate reductase in the blue light responses of photosuppression and phase shifting of circadian conidiation was studied in Neurospora crassa. The photoresponses, as assayed in three nitrate reductase mutants (nit‐1,nit–2 and nit‐3), showed no significant differences as compared to the responses in a strain which could utilize nitrate. In addition, the responses occur on a medium which (i) represses nitrate reductase activity due to the presence of ammonium ion and arginine or (ii) results in the production of an inactive enzyme due to the presence of tungsten. Nitrate reductase appears to be of no or secondary importance as a photoreceptor in the responses studied.