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- Title
Insight into the mechanism of end-of-day far-red light (EODFR)-induced shade avoidance responses in <italic>Arabidopsis thaliana</italic>.
- Authors
Mizuno, Takeshi; Oka, Haruka; Yoshimura, Fumi; Ishida, Kai; Yamashino, Takafumi
- Abstract
Shade avoidance responses are changes in plant architecture to reduce the part of a body that is in the shade in natural habitats. The most common warning signal that induces shade avoidance responses is reduction of red/far-red light ratio perceived by phytochromes. A pair of basic helix-loop-helix transcription factors, named PHYTOCHROME-INTERACTING FACTOR 4 (PIF4) and PIF5, is crucially involved in the shade avoidance-induced hypocotyl elongation in <italic>Arabidopsis thaliana</italic>. It has been recently reported that PIF7 also plays a role in this event. Here, we examined the involvement of these PIFs in end-of-day far-red light (EODFR) responses under light and dark cycle conditions. It was shown that PIF7 played a predominant role in the EODFR-dependent hypocotyl elongation. We propose the mechanism by which PIF7 together with PIF4 and PIF5 coordinately transcribes a set of downstream genes to promote elongation of hypocotyls in response to the EODFR treatment.
- Subjects
ARABIDOPSIS thaliana; HYPOCOTYLS
- Publication
Bioscience, Biotechnology & Biochemistry, 2015, Vol 79, Issue 12, p1987
- ISSN
0916-8451
- Publication type
Article
- DOI
10.1080/09168451.2015.1065171