SUB1, an Arabidopsis, [Ca.sup.2+]-Binding Protein Involved in Cryptochrome and Phytochrome Coaction

Cryptochromes and phytochromes are the major photosensory receptors in plants and often regulate similar photomorphogenic responses. The molecular mechanisms underlying functional interactions of cryptochromes and phytochromes remain largely unclear. We have identified an Arabidopsis photomorphogeni...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2001-01, Vol.291 (5503), p.487-487
Main Authors: Guo, Hongwei, Mockler, Todd, Duong, Hien, Lin, Chentao
Format: Article
Language:English
Subjects:
Biochemistry
Photochemical research
Photoreceptors
Photosynthesis research
Plant genetics
Online Access:Get full text
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Summary:Cryptochromes and phytochromes are the major photosensory receptors in plants and often regulate similar photomorphogenic responses. The molecular mechanisms underlying functional interactions of cryptochromes and phytochromes remain largely unclear. We have identified an Arabidopsis photomorphogenic mutant, sub1, which exhibits hypersensitive responses to blue tight and far-red light. Genetic analyses indicate that SUB1 functions as a component of a cryptochrome signaling pathway and as a modulator of a phytochrome signaling pathway. The SUB1 gene encodes a [Ca.sup.2+]-binding protein that suppresses light-dependent accumulation of the transcription factor HY5.
ISSN:0036-8075
1095-9203