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Post-transcriptional regulation of Ghd7 protein stability by phytochrome and OsGI in photoperiodic control of flowering in rice.

New Phytol. 2019; 
Zheng T, Sun J, Zhou S, Chen S, Lu J, Cui S, Tian Y, Zhang H, Cai M, Zhu S, Wu M, Wang Y, Jiang L, Zhai H, Wang H, Wan J,.
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摘要

Rice (Oryza sativa) is a facultative short-day (SD) plant, flowering early under SD and late under long-day (LD) conditions. Ghd7 is a major regulator of flowering time in rice, which strongly delays flowering under LD. Induction of Ghd7 expression by phytochromes has been shown to contribute to photoperiodic regulation of flowering in rice. Here, we show that Ghd7 also is regulated by phytochromes at a post-transcriptional level. We found that constitutive expression of Ghd7 delays flowering in the wild-type (WT) background, but not in the se5 mutant background (deficient in functional phytochromes) under LD and that Ghd7 protein fails to accumulate in the se5 mutant. We also found that co-expressing OsGIGANTE... More

关键词

Ghd7; OsGI; heading date; phytochrome; rice