Blue light signaling in mosses

Arabidopsis thaliana contains five identified blue light photoreceptors and at least one unidentified blue/UV-A light photoreceptor. Cryptochromes (CRY1 and CRY2) modulate photomorphological processes, flowering time, and circadian timing while phototrophins (PHOT1 and PHOT2) modulate phototropism,...

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Bibliographic Details
Published inYíchuán Vol. 28; no. 6; p. 754
Main Authors Sun, Ming-Ming, Jin, Shuo, Liu, Xiang-Lin, He, Yi-Kun
Format Journal Article
LanguageChinese
Published China 01.06.2006
Subjects
Bryophyta - metabolism
Bryophyta - radiation effects
Cryptochromes
Flavoproteins - genetics
Flavoproteins - metabolism
Light
Light Signal Transduction
Phototropism
Plant Proteins - genetics
Plant Proteins - metabolism
Ultraviolet Rays
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Summary:Arabidopsis thaliana contains five identified blue light photoreceptors and at least one unidentified blue/UV-A light photoreceptor. Cryptochromes (CRY1 and CRY2) modulate photomorphological processes, flowering time, and circadian timing while phototrophins (PHOT1 and PHOT2) modulate phototropism, chloroplast movement, and stomatal opening. Flavins are the chromophores and absorb in the blue and UV-A range. Considerable information is known about the structure and mode of action of these photoreceptors. The moss Physcomitrella patens contains two identified cryptochromes (CRY1a and CRY1b) which modulate side branch formation and auxin metabolism. Blue light-induced chloroplast movement was mediated by four phototropins. Transduction of the blue/UV-A stimulus does involve calcium signaling in moss cells.
ISSN:0253-9772