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Calmodulin antagonists inhibit the phytochrome‐induced appearance of two nuclear encoded transcripts in radish cotyledons
Author(s) -
Fourcroy Pierre,
Pronost Stephane,
Klein-Eude Dominique
Publication year - 1990
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(90)80612-m
Subject(s) - trifluoperazine , phytochrome , calmodulin , messenger rna , protein subunit , rubisco , phytochrome a , biology , biochemistry , chemistry , microbiology and biotechnology , red light , botany , gene , enzyme , arabidopsis , mutant
The effects of two calmodulin antagonists on the phytochrome‐mediated appearance of two nuclear encoded transcripts in radish cotyledons have been investigated. The extent of inhibition of transcript accumulation was dependent of the time ellapsed between the administration of trifluoperazine and the light stimulus. When 1 mM trifluoperazine was administered to the seedlings 8 h before red light irradiation, the inhibition of transcript accumulation was up to 62% for the chlorophyllbinding protein mRNA and 56% for the ribulose 1,5‐bisphosphate carboxylase small subunit mRNA. Similar results were obtained with W‐7 (0.1 mM).