Natural variation of STKc_GSK3 kinase TaSG-D1 contributes to heat stress tolerance in Indian dwarf wheat

Jie Cao, Zhen Qin, Guangxian Cui, Zhaoyan Chen, Xuejiao Cheng, Huiru Peng, Yingyin Yao, Zhaorong Hu, Weilong Guo, Zhongfu Ni, Qixin Sun and Mingming Xin ()
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Jie Cao: China Agricultural University
Zhen Qin: China Agricultural University
Guangxian Cui: China Agricultural University
Zhaoyan Chen: China Agricultural University
Xuejiao Cheng: China Agricultural University
Huiru Peng: China Agricultural University
Yingyin Yao: China Agricultural University
Zhaorong Hu: China Agricultural University
Weilong Guo: China Agricultural University
Zhongfu Ni: China Agricultural University
Qixin Sun: China Agricultural University
Mingming Xin: China Agricultural University

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Heat stress threatens global wheat (Triticum aestivum) production, causing dramatic yield losses worldwide. Identifying heat tolerance genes and comprehending molecular mechanisms are essential. Here, we identify a heat tolerance gene, TaSG-D1E286K, in Indian dwarf wheat (Triticum sphaerococcum), which encodes an STKc_GSK3 kinase. TaSG-D1E286K improves heat tolerance compared to TaSG-D1 by enhancing phosphorylation and stability of downstream target TaPIF4 under heat stress condition. Additionally, we reveal evolutionary footprints of TaPIF4 during wheat selective breeding in China, that is, InDels predominantly occur in the TaPIF4 promoter of Chinese modern wheat cultivars and result in decreased expression level of TaPIF4 in response to heat stress. These sequence variations with negative effect on heat tolerance are mainly introduced from European germplasm. Our study provides insight into heat stress response mechanisms and proposes a potential strategy to improve wheat heat tolerance in future.

Date: 2024
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DOI: 10.1038/s41467-024-46419-0

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