BES1 hinders ABSCISIC ACID INSENSITIVE5 and promotes seed germination in Arabidopsis

The New Phytologist
Xuan ZhaoTonglin Mao

Abstract

Proper regulation of seed germination is essential for the successful propagation of a plant. The transcription factor ABSCISIC ACID INSENSITIVE5 (ABI5) of the abscisic acid (ABA) signaling pathway plays a central role in the inhibition of seed germination. ABI5 is precisely regulated by the core ABA signaling components and multiple other factors. However, the complex regulatory network of ABI5 remains largely unknown. In this study, we determined the biochemical interaction between ABI5 and the BRINSENSITIVE1 (BRI1)-EMS-SUPPRESSOR1 (BES1) transcription factor of the brassinosteroid (BR) signaling pathway, as well as the function of BES1 regulating ABI5 during seed germination in Arabidopsis. BES1 directly interacts with ABI5 both in vitro and in vivo. The bZIP domain of ABI5, which is responsible for DNA binding, is critical for ABI5 binding to BES1. The interaction of BES1 with ABI5 significantly suppressed the binding of ABI5 to the promoter regions of downstream genes, which resulted in their reduced expression and consequently facilitated seed germination. This study shed new light on the coordination of multiple signaling pathways during seed germination. In particular, BES1 directly binds to ABI5, which interferes with ...Continue Reading

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Citations

Feb 12, 2020·International Journal of Molecular Sciences·Tingting ZhuAnd Maozhi Ren
Jun 5, 2020·Plants·Gerardo Carrera-CastañoLuis Oñate-Sánchez
Jun 4, 2020·The Plant Journal : for Cell and Molecular Biology·Yanjie XuBo Hong
Feb 8, 2020·International Journal of Molecular Sciences·Fuai SunFengling Fu
Jul 30, 2019·The Plant Journal : for Cell and Molecular Biology·Hao JiangYanhai Yin
Oct 19, 2019·International Journal of Molecular Sciences·Qian-Feng LiQiao-Quan Liu
Jul 28, 2020·International Journal of Molecular Sciences·Xi LiQingjun Xie
Dec 11, 2020·Plant Signaling & Behavior·Michael Bunsick, Shelley Lumba
Nov 19, 2020·Journal of Experimental Botany·Fuai SunHaoqiang Yu
Feb 23, 2020·Plant Science : an International Journal of Experimental Plant Biology·Qian-Feng LiQiao-Quan Liu
Jan 21, 2021·Journal of Experimental Botany·Li TaiKun-Ming Chen
May 12, 2021·Plant Cell Reports·Ya-Jing LiuChun-Xiang You
Sep 8, 2021·Plant Molecular Biology·Prakash Kumar BhagatAlok Krishna Sinha

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