Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 promote seedling photomorphogenesis in multiple light signaling pathways

Plant Physiology
Peng ZhouJianping Yang

Abstract

Arabidopsis (Arabidopsis thaliana) seedlings undergo photomorphogenesis in the light and etiolation in the dark. Light-activated photoreceptors transduce the light signals through a series of photomorphogenesis promoting or repressing factors to modulate many developmental processes in plants, such as photomorphogenesis and shade avoidance. CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1) is a conserved RING finger E3 ubiquitin ligase, which mediates degradation of several photomorphogenesis promoting factors, including ELONGATED HYPOCOTYL5 (HY5) and LONG HYPOCOTYL IN FAR-RED1 (HFR1), through a 26S proteasome-dependent pathway. PHYTOCHROME RAPIDLY REGULATED1 (PAR1) was first detected as an early repressed gene in both phytochrome A (phyA)-mediated far-red and phyB-mediated red signaling pathways, and subsequent studies showed that both PAR1 and PAR2 are negative factors of shade avoidance in Arabidopsis. However, the role of PAR1 and PAR2 in seedling deetiolation, and their relationships with other photomorphogenesis promoting and repressing factors are largely unknown. Here, we confirmed that both PAR1 and PAR2 redundantly enhance seedling deetiolation in multiple photoreceptor signaling pathways. Their transcript abundances are represse...Continue Reading

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Citations

Dec 27, 2015·Plant Science : an International Journal of Experimental Plant Biology·Huey-Wen ChuangMiam-Ju Wei
Feb 26, 2015·Frontiers in Plant Science·Xiaoyu JiYucheng Wang
Jan 20, 2017·Plant, Cell & Environment·David J Sheerin, Andreas Hiltbrunner
Mar 23, 2017·The Plant Journal : for Cell and Molecular Biology·Yuyu ZhengZiqiang Zhu
Apr 19, 2018·The Plant Journal : for Cell and Molecular Biology·Christophe GaillochetJan U Lohmann
Apr 6, 2019·Journal of Experimental Botany·Zsuzsanna MéraiOrtrun Mittelsten Scheid
Feb 14, 2020·Physiologia Plantarum·Sara ButiRonald Pierik
Dec 11, 2019·International Journal of Molecular Sciences·Sharanya TripathiJeong-Il Kim
Oct 11, 2017·Journal of Experimental Botany·Joo Yong KimHak Soo Seo
May 1, 2020·Frontiers in Plant Science·Xiaoyan WangQifeng Ma
Dec 16, 2020·Proceedings of the National Academy of Sciences of the United States of America·Chuanwei YangLin Li
Mar 27, 2016·Current Opinion in Plant Biology·Leonela G CarriedoSiobhan M Brady

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