生理盐水
转录因子
基因敲除
化学
盐(化学)
ATP酶
盐度
生物
细胞生物学
生物化学
基因
酶
内分泌学
生态学
物理化学
作者
Wei Lin,Xiangxiang Ren,Lumin Qin,Rong Zhang,Minghan Cui,Guangmin Xia,Shuwei Liu
摘要
ABSTRACT Saline–alkaline soils are a major environmental problem that limit plant growth and crop productivity. Plasma membrane H + ‐ATPases and the salt overly sensitive (SOS) signaling pathway play important roles in plant responses to saline–alkali stress. However, little is known about the functional genes and mechanisms regulating the transcription of H + ‐ATPases and SOS pathway genes under saline–alkali stress. In the present study, we identified that the plant AT‐rich sequence and zinc‐binding (TaPLATZ2) transcription factor are involved in wheat response to saline–alkali stress by directly suppressing the expression of TaHA2 / TaSOS3 . The knockdown of TaPLATZ2 enhances salt and alkali stress tolerance, while overexpression of TaPLATZ2 leads to salt and alkali stress sensitivity in wheat. In addition, TaWRKY55 directly upregulated the expression of TaPLATZ2 during saline–alkali stress. Through knockdown and overexpression of TaWRKY55 in wheat, TaWRKY55 was shown to negatively modulate salt and alkali stress tolerance. Genetic analyses confirmed that TaPLATZ2 functions downstream of TaWRKY55 in response to salt and alkaline stresses. These findings provide a TaWRKY55–TaPLATZ2– TaHA2/TaSOS3 regulatory module that regulates wheat responses to saline–alkali stress.
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