AtDIV2, an R-R-type MYB transcription factor of Arabidopsis, negatively regulates salt stress by modulating ABA signaling

NWIPB OpenIR

	AtDIV2, an R-R-type MYB transcription factor of Arabidopsis, negatively regulates salt stress by modulating ABA signaling
	Fang, Qing; Wang, Qiong; Mao, Hui; Xu, Jing; Wang, Ying; Hu, Hao; He, Shuai; Tu, Junchu; Cheng, Chao; Tian, Guozheng; Wang, Xianqiang; Liu, Xiaopeng; Zhang, Chi; Luo, Keming
	2018
发表期刊	PLANT CELL REPORTS
卷号	37 期号:11
摘要	Key messageAtDIV2 integrates ABA signaling to negatively regulate salt stress in Arabidopsis.AbstractAmDIV (DIVARICATA) is a functional MYB transcription factor (TF) that regulates ventral identity during floral development in Antirrhinum. There are six members of DIV homologs in Arabidopsis; however, the functions of these proteins are largely unknown. Here, we characterized an R-R-type MYB TF AtDIV2, which is involved in salt stress responses and abscisic acid (ABA) signaling. Although universally expressed in tissues, the nuclear-localized AtDIV2 appeared not to be involved in seedling development processes. However, upon exposure to salt stress and exogenous ABA, the transcripts of AtDIV2 are markedly increased in wild-type (Wt) plants. The loss-of-function mutant div2 displayed much more tolerance to salt stress, and several salt-responsive genes were up-regulated. In addition, the div2 mutant showed higher sensitivity to ABA during seed germination. And the germination variance between the Wt and div2 mutant cannot be rectified by treatment with both ABA and sodium tungstate at the same time. ELISA results showed that the endogenous ABA content in the div2 mutant is clearly increased than that in Wt plants. Furthermore, the transcriptional expressions of several ABA-related genes, including ABA1 and ABI3, were elevated. Taken together, ourresults suggestthat the R-R-type MYB TF AtDIV2 plays negative roles in salt stress and is required for ABA signaling in Arabidopsis.
关键词	DIV Salt stress MYB Transcription factor ABA
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/59947
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Fang, Qing,Wang, Qiong,Mao, Hui,et al. AtDIV2, an R-R-type MYB transcription factor of Arabidopsis, negatively regulates salt stress by modulating ABA signaling[J]. PLANT CELL REPORTS,2018,37(11).
APA	Fang, Qing.,Wang, Qiong.,Mao, Hui.,Xu, Jing.,Wang, Ying.,...&Luo, Keming.(2018).AtDIV2, an R-R-type MYB transcription factor of Arabidopsis, negatively regulates salt stress by modulating ABA signaling.PLANT CELL REPORTS,37(11).
MLA	Fang, Qing,et al."AtDIV2, an R-R-type MYB transcription factor of Arabidopsis, negatively regulates salt stress by modulating ABA signaling".PLANT CELL REPORTS 37.11(2018).