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GIGANTEA Shapes the Photoperiodic Rhythms of Thermomorphogenic Growth in Arabidopsis

Cited 8 time in Web of Science Cited 8 time in Scopus
Authors
Park, Young-Joon; Kim, Jae Young; Lee, June-Hee; Lee, Byoung-Doo; Paek, Nam-Chon; Park, Chung-Mo
Issue Date
2020-03
Citation
Molecular Plant, Vol.13 No.3, pp.459-470
Keywords
thermomorphogenesisday lengthGIRGAPIF4
Abstract
Plants maintain their internal temperature under environments with fluctuating temperatures by adjusting their morphology and architecture, an adaptive process termed thermomorphogenesis. Notably, the rhythmic patterns of plant thermomorphogenesis are governed by day-length information. However, it remains elusive how thermomorphogenic rhythms are regulated by photoperiod. Here, we show that warm temperatures enhance the accumulation of the chaperone GIGANTEA (GI), which thermostabilizes the DELLA protein, REPRESSOR OF ga1-3 (RGA), under long days, thereby attenuating PHYTOCHROME INTERACTING FACTOR 4 (PIF4)-mediated thermomorphogenesis. In contrast, under short days, when GI accumulation is reduced, RGA is readily degraded through the gibberellic acid-mediated ubiquitination-proteasome pathway, promoting thermomorphogenic growth. These data indicate that the GI-RGA-PIF4 signaling module enables plant thermomorphogenic responses to occur in a day-length-dependent manner. We propose that the GI-mediated integration of photoperiodic and temperature information shapes thermomorphogenic rhythms, which enable plants to adapt to diel fluctuations in day length and temperature during seasonal transitions.
ISSN
1674-2052
URI
https://hdl.handle.net/10371/171999
DOI
https://doi.org/10.1016/j.molp.2020.01.003
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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