Transcription elongation factor AtSPT4-2 positively modulates salt tolerance in Arabidopsis thaliana

BMC Plant Biology

Research

Liangqi Sun¹  Ayesha Liaqat¹  Pingxia Zhao¹  Chengbin Xiang¹  Alamin Alfatih¹  Sami Ullah Jan¹ 

[1] Division of Life Sciences and Medicine; Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale; MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, University of Science and Technology of China, The Innovation Academy of Seed Design, Chinese Academy of Sciences, 230027, Hefei, Anhui Province, China;

关键词: Salt stress;    Salt tolerance;    Transcription elongation factor;    AtSPT4-2;    Arabidopsis thaliana;   

DOI  :  10.1186/s12870-023-04060-x

 received in 2022-09-21, accepted in 2023-01-12,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundSalt stress significantly influences plant growth and reduces crop yield. It is highly anticipated to develop salt-tolerant crops with salt tolerance genes and transgenic technology. Hence, it is critical to identify salt tolerance genes that can be used to improve crop salt tolerance.ResultsWe report that the transcription elongation factor suppressor of Ty 4-2 (SPT4-2) is a positive modulator of salt tolerance in Arabidopsis thaliana. AtSPT4-2 expression is induced by salt stress. Knockout mutants of AtSPT4-2 display a salt-sensitive phenotype, whereas AtSPT4-2 overexpression lines exhibit enhanced salt tolerance. Comparative transcriptomic analyses revealed that AtSPT4-2 may orchestrate the expression of genes associated with salt tolerance, including stress-responsive markers, protein kinases and phosphatases, salt-responsive transcription factors and those maintaining ion homeostasis, suggesting that AtSPT4-2 improves salt tolerance mainly by maintaining ion homeostasis and enhancing stress tolerance.ConclusionsAtSPT4-2 positively modulates salt tolerance by maintaining ion homeostasis and regulating stress-responsive genes and serves as a candidate for the improvement of crop salt tolerance.

【 授权许可】

CC BY   
© The Author(s) 2023

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