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10.3390/ijms23147890
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Article

Heterologous Expression of MfWRKY7 of Resurrection Plant Myrothamnus flabellifolia Enhances Salt and Drought Tolerance in Arabidopsis

by
Zhuo Huang
1,*,
Ling Liu
1,
Linli Jian
1,
Wenxin Xu
1,
Jiatong Wang
1,
Yaxuan Li
1 and
Cai-Zhong Jiang
2,3
1
College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
2
Department of Plant Sciences, University of California Davis, Davis, CA 95616, USA
3
Crops Pathology and Genetics Research Unit, United States Department of Agriculture, Agricultural Research Service, Davis, CA 95616, USA
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2022, 23(14), 7890; https://doi.org/10.3390/ijms23147890
Submission received: 22 June 2022 / Revised: 13 July 2022 / Accepted: 13 July 2022 / Published: 17 July 2022
(This article belongs to the Special Issue Regulatory Mechanism and Network of Abiotic Stress-Response in Plants)
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Abstract

Drought and salinity have become major environmental problems that affect the production of agriculture, forestry and horticulture. The identification of stress-tolerant genes from plants adaptive to harsh environments might be a feasible strategy for plant genetic improvement to address the challenges brought by global climate changes. In this study, a dehydration-upregulated gene MfWRKY7 of resurrection Plant Myrothamnusflabellifolia, encoding a group IId WRKY transcription factor, was cloned and characterized. The overexpression of MfWRKY7 in Arabidopsis increased root length and tolerance to drought and NaCl at both seedling and adult stages. Further investigation indicated that MfWRKY7 transgenic plants had higher contents of chlorophyll, proline, soluble protein, and soluble sugar but a lower water loss rate and malondialdehyde content compared with wild-type plants under both drought and salinity stresses. Moreover, the higher activities of antioxidant enzymes and lower accumulation of O2− and H2O2 in MfWRKY7 transgenic plants were also found, indicating enhanced antioxidation capacity by MfWRKY7. These findings showed that MfWRKY7 may function in positive regulation of responses to drought and salinity stresses, and therefore, it has potential application value in genetic improvement of plant tolerance to abiotic stress.
Keywords: Myrothamnus flabellifolia; WRKY; transcription factor; drought stress Myrothamnus flabellifolia; WRKY; transcription factor; drought stress

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MDPI and ACS Style

Huang, Z.; Liu, L.; Jian, L.; Xu, W.; Wang, J.; Li, Y.; Jiang, C.-Z. Heterologous Expression of MfWRKY7 of Resurrection Plant Myrothamnus flabellifolia Enhances Salt and Drought Tolerance in Arabidopsis. Int. J. Mol. Sci. 2022, 23, 7890. https://doi.org/10.3390/ijms23147890

AMA Style

Huang Z, Liu L, Jian L, Xu W, Wang J, Li Y, Jiang C-Z. Heterologous Expression of MfWRKY7 of Resurrection Plant Myrothamnus flabellifolia Enhances Salt and Drought Tolerance in Arabidopsis. International Journal of Molecular Sciences. 2022; 23(14):7890. https://doi.org/10.3390/ijms23147890

Chicago/Turabian Style

Huang, Zhuo, Ling Liu, Linli Jian, Wenxin Xu, Jiatong Wang, Yaxuan Li, and Cai-Zhong Jiang. 2022. "Heterologous Expression of MfWRKY7 of Resurrection Plant Myrothamnus flabellifolia Enhances Salt and Drought Tolerance in Arabidopsis" International Journal of Molecular Sciences 23, no. 14: 7890. https://doi.org/10.3390/ijms23147890

APA Style

Huang, Z., Liu, L., Jian, L., Xu, W., Wang, J., Li, Y., & Jiang, C.-Z. (2022). Heterologous Expression of MfWRKY7 of Resurrection Plant Myrothamnus flabellifolia Enhances Salt and Drought Tolerance in Arabidopsis. International Journal of Molecular Sciences, 23(14), 7890. https://doi.org/10.3390/ijms23147890

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