[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, 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.
Sun
Ming-Ming
MM
College of Life Science, Capital Normal University, Beijing 100037, China. sunmm@hotmail.com
Jin
Shuo
S
Liu
Xiang-Lin
XL
He
Yi-Kun
YK
D044002:Bryophyta / Q000378:metabolism* / Q000528:radiation effects*; D056931:Cryptochromes; D005420:Flavoproteins / Q000235:genetics / Q000378:metabolism; D008027:Light; D055537:Light Signal Transduction; D018524:Phototropism; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D014466:Ultraviolet Rays
D056931:Cryptochromes; D005420:Flavoproteins; D010940:Plant Proteins