The tumor necrosis factor receptor-associated factor (TRAF)-like family protein SEVEN IN ABSENTIA 2 (SINA2) promotes drought tolerance in an ABA-dependent manner in Arabidopsis.

The New Phytologist
Yan BaoHongxia Zhang

Abstract

Tumor necrosis factor receptor-associated factor (TRAF) proteins play crucial roles in plant development and response to abiotic stress. Here, we present genetic evidence that SEVEN IN ABSENTIA 2 (SINA2), a TRAF-like family protein, is involved in abscisic acid (ABA)-related drought stress signaling in Arabidopsis. Gene expression, protein subcellular localization, protein-protein interaction, and a transient transcription dual-luciferase assay were performed. The drought tolerance of SINA2 loss-of-function mutants and SINA2-overexpressing plants was investigated. In Arabidopsis, SINA2 was significantly induced by ABA and drought treatment. The SINA2-YFP fusion protein was predominately localized in the nuclei and cytoplasm. Loss of function of SINA2 (sina2) reduced drought tolerance, whereas overexpression of SINA2 increased stomatal closure, decreased water loss, and therefore improved drought resistance in transgenic plants. Upon ABA treatment, expression of some key ABA- and stress-responsive genes decreased in the sina2 mutant, but increased in SINA2-overexpressing plants. Furthermore, SINA2 was induced in the ABA-deficient mutant by ABA, but not by drought stress. Thus, the drought response of SINA2 was ABA-dependent. Pro...Continue Reading

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Citations

Feb 13, 2016·Cell Host & Microbe·Shuai HuangXin Li
Apr 26, 2016·Plant Signaling & Behavior·Yan BaoHong-Xia Zhang
Oct 13, 2016·Functional & Integrative Genomics·Jannatul FerdousPenny J Tricker
Jan 11, 2018·Plant, Cell & Environment·Wenjie WangFangming Xiao
Aug 7, 2019·Journal of Experimental Botany·Miriam Gil-MonrealMercedes Royuela
Mar 15, 2020·Proceedings of the National Academy of Sciences of the United States of America·Yan BaoDiane C Bassham
Apr 10, 2019·Molecular Plant·Chongyang ZhangGuo-Liang Wang
Apr 12, 2017·Developmental Cell·Trevor M NolanYanhai Yin
Apr 3, 2021·BMC Plant Biology·Fabien CormierHâna Chaïr
Aug 19, 2021·Proceedings of the National Academy of Sciences of the United States of America·Han Yong LeeGyeong Mee Yoon
Oct 23, 2021·Journal of Integrative Plant Biology·Hua QiJuan Li

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