Article: article from journal or magazin.
RSF1, an Arabidopsis locus implicated in phytochrome A signaling.
In Arabidopsis, phytochrome A (phyA) is the major photoreceptor both for high irradiance responses to far-red light and broad spectrum very low fluence responses, but little is known of its signaling pathway(s). rsf1 was isolated as a recessive mutant with reduced sensitivity to far-red inhibition of hypocotyl elongation. At the seedling stage rsf1 mutants are affected, to various degrees, in all described phyA-mediated responses. However, in adult rsf1 plants, the photoperiodic flowering response is normal. The rsf1 mutant has wild-type levels of phyA suggesting that RSF1 is required for phyA signaling rather than phyA stability or biosynthesis. RSF1 thus appears to be a major phyA signaling component in seedlings, but not in adult, Arabidopsis plants.
Arabidopsis, Arabidopsis Proteins, Electrophoresis, Polyacrylamide Gel, Light, Mutation, Photoreceptor Cells, Phytochrome, Phytochrome A, Phytochrome B, Signal Transduction, Transcription Factors
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