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Article

OsWRKY97, an Abiotic Stress-Induced Gene of Rice, Plays a Key Role in Drought Tolerance

by
Miaomiao Lv
1,†,
Dejia Hou
2,†,
Jiale Wan
1,
Taozhi Ye
1,
Lin Zhang
1,
Jiangbo Fan
1,
Chunliu Li
1,
Yilun Dong
1,
Wenqian Chen
1,
Songhao Rong
1,
Yihao Sun
1,
Jinghong Xu
3,
Liangjun Cai
3,
Xiaoling Gao
1,
Jianqing Zhu
1,
Zhengjian Huang
1,
Zhengjun Xu
1,4,5,* and
Lihua Li
1,4,5,*
1
Rice Research Institute of Sichuan Agricultural University, Chengdu 611130, China
2
College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
3
Crop Research Institute, Academy of Agricultural and Forestry Sciences, Chengdu 611130, China
4
Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Chengdu 611130, China
5
State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Plants 2023, 12(18), 3338; https://doi.org/10.3390/plants12183338
Submission received: 25 August 2023 / Revised: 12 September 2023 / Accepted: 15 September 2023 / Published: 21 September 2023
(This article belongs to the Special Issue Abiotic Stress Tolerance in Rice and Rice Breeding)
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Abstract

Drought stress is one of the major causes of crop losses. The WRKY families play important roles in the regulation of many plant processes, including drought stress response. However, the function of individual WRKY genes in plants is still under investigation. Here, we identified a new member of the WRKY families, OsWRKY97, and analyzed its role in stress resistance by using a series of transgenic plant lines. OsWRKY97 positively regulates drought tolerance in rice. OsWRKY97 was expressed in all examined tissues and could be induced by various abiotic stresses and abscisic acid (ABA). OsWRKY97-GFP was localized to the nucleus. Various abiotic stress-related cis-acting elements were observed in the promoters of OsWRKY97. The results of OsWRKY97-overexpressing plant analyses revealed that OsWRKY97 plays a positive role in drought stress tolerance. In addition, physiological analyses revealed that OsWRKY97 improves drought stress tolerance by improving the osmotic adjustment ability, oxidative stress tolerance, and water retention capacity of the plant. Furthermore, OsWRKY97-overexpressing plants also showed higher sensitivity to exogenous ABA compared with that of wild-type rice (WT). Overexpression of OsWRKY97 also affected the transcript levels of ABA-responsive genes and the accumulation of ABA. These results indicate that OsWRKY97 plays a crucial role in the response to drought stress and may possess high potential value in improving drought tolerance in rice.
Keywords: drought tolerance; ABA; OsWRKY97; antioxidation; Oryza sativa L. drought tolerance; ABA; OsWRKY97; antioxidation; Oryza sativa L.

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MDPI and ACS Style

Lv, M.; Hou, D.; Wan, J.; Ye, T.; Zhang, L.; Fan, J.; Li, C.; Dong, Y.; Chen, W.; Rong, S.; et al. OsWRKY97, an Abiotic Stress-Induced Gene of Rice, Plays a Key Role in Drought Tolerance. Plants 2023, 12, 3338. https://doi.org/10.3390/plants12183338

AMA Style

Lv M, Hou D, Wan J, Ye T, Zhang L, Fan J, Li C, Dong Y, Chen W, Rong S, et al. OsWRKY97, an Abiotic Stress-Induced Gene of Rice, Plays a Key Role in Drought Tolerance. Plants. 2023; 12(18):3338. https://doi.org/10.3390/plants12183338

Chicago/Turabian Style

Lv, Miaomiao, Dejia Hou, Jiale Wan, Taozhi Ye, Lin Zhang, Jiangbo Fan, Chunliu Li, Yilun Dong, Wenqian Chen, Songhao Rong, and et al. 2023. "OsWRKY97, an Abiotic Stress-Induced Gene of Rice, Plays a Key Role in Drought Tolerance" Plants 12, no. 18: 3338. https://doi.org/10.3390/plants12183338

APA Style

Lv, M., Hou, D., Wan, J., Ye, T., Zhang, L., Fan, J., Li, C., Dong, Y., Chen, W., Rong, S., Sun, Y., Xu, J., Cai, L., Gao, X., Zhu, J., Huang, Z., Xu, Z., & Li, L. (2023). OsWRKY97, an Abiotic Stress-Induced Gene of Rice, Plays a Key Role in Drought Tolerance. Plants, 12(18), 3338. https://doi.org/10.3390/plants12183338

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