ABA promotes sulfite stress tolerance by ABF4-mediated upregulation of SOX expression
ABA promotes sulfite stress tolerance by ABF4-mediated upregulation of SOX expression
复制标题
ABA通过ABF4上调SOX表达促进亚硫酸盐胁迫耐受性
DOI：
10.1016/j.envexpbot.2022.105070
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发表时间：
2022-09-15
影响因子：
5.7
通讯作者：
Lu，Ying-Tang
中科院分区：
文献类型：
--
作者：
Yu，Zhen-Dong;Ding，Feng;Lu，Ying-Tang
With the development of industry, atmospheric SO2is rapidly increased, seriously affecting plant growth and crop production. However, the mechanism of how plants respond to high SO2-induced sulfite stress is poorly characterized. Here we report that ABA signaling is involved in plant tolerance to sulfite stress. Our results indicate that the sulfite-stressed plants accumulated higher ABA with promoted expression of ABA-responsive genes compared with unstressed control and the ABA-biosynthetic mutantABA DEFICIENT2(aba2–1) had less sulfite tolerance than wild-type plants, supporting a role of ABA in plant sulfite stress response. ABA functions through its downstream transcription factor ABF4 because theabf4–1mutant was more sensitive but the35 S::ABF4plants more tolerant to the sulfite stress than wild-type plants. Further, ABF4 upregulates SOX expression by directly binding to its promoter and overexpression ofSOXcan rescue increased stress sensitivity ofabf4–1mutant, showing thatSOXacts downstream ofABF4. Together, our study reveals that the sulfite-stressed plants can activate ABA/ABF4 signaling to enhanceSOXexpression in plant sulfite stress tolerance.
