Back to Search Start Over

TaTIP41 and TaTAP46 positively regulate drought tolerance in wheat by inhibiting PP2A activity.

Authors :
Ma, Jianhui
Geng, Yuke
Liu, Hong
Zhang, Mengqi
Liu, Shujuan
Hao, Chenyang
Hou, Jian
Zhang, Youfu
Zhang, Daijing
Zhang, Weijun
Zhang, Xueyong
Li, Tian
Source :
Journal of Integrative Plant Biology. Sep2023, Vol. 65 Issue 9, p2056-2070. 15p.
Publication Year :
2023

Abstract

Drought is a major environmental stress limiting global wheat (Triticum aestivum) production. Exploring drought tolerance genes is important for improving drought adaptation in this crop. Here, we cloned and characterized TaTIP41, a novel drought tolerance gene in wheat. TaTIP41 is a putative conserved component of target of rapamycin (TOR) signaling, and the TaTIP41 homoeologs were expressed in response to drought stress and abscisic acid (ABA). The overexpression of TaTIP41 enhanced drought tolerance and the ABA response, including ABA‐induced stomatal closure, while its downregulation using RNA interference (RNAi) had the opposite effect. Furthermore, TaTIP41 physically interacted with TaTAP46, another conserved component of TOR signaling. Like TaTIP41, TaTAP46 positively regulated drought tolerance. Furthermore, TaTIP41 and TaTAP46 interacted with type‐2A protein phosphatase (PP2A) catalytic subunits, such as TaPP2A‐2, and inhibited their enzymatic activities. Silencing TaPP2A‐2 improved drought tolerance in wheat. Together, our findings provide new insights into the roles of TaTIP41 and TaTAP46 in the drought tolerance and ABA response in wheat, and their potential application in improving wheat environmental adaptability. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
16729072
Volume :
65
Issue :
9
Database :
Academic Search Index
Journal :
Journal of Integrative Plant Biology
Publication Type :
Academic Journal
Accession number :
172000707
Full Text :
https://doi.org/10.1111/jipb.13542