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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (9): 2329-2342.doi: 10.16420/j.issn.0513-353x.2024-0960

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Function Analysis ofStRGLG1in Regulating Potato to Drought Stress Response

ZHU Cunlan1,2, FAN Junliang1,2, WANG Kaitong1,3, WEI Meng1,2, YANG Liang1,3, LIU Haotian1,3, SI Huaijun1,2, ZHANG Ning1,2,*()   

  1. 1 State Key Laboratory of Aridland Crop ScienceGansu Agricultural University, Lanzhou 730070, China
    2 College of Life Science and TechnologyGansu Agricultural University, Lanzhou 730070, China
    3 College of AgronomyGansu Agricultural University, Lanzhou 730070, China
  • Received:2025-04-18 Revised:2025-07-21 Online:2025-09-25 Published:2025-09-24
  • Contact: ZHANG Ning

Abstract:

RING DOMAIN LIGASE(RGLG)is a ring-type ubiquitin ligase E3,which is involved in plant growth and development,signal transduction and abiotic stress. To further investigate the function and regulatory mechanism ofStRGLG1gene in potato stress response,qRT-PCR was used to assay the expression level ofStRGLG1gene in potato under drought stress.StRGLG1overexpression and interference expression plants of potato were obtained by genetic transformation. The activities of superoxide dismutase(SOD),catalase(CAT)and peroxidase(POD)and the content of malondialdehyde(MDA)in transgenic plants were measured before and after drought stress. StRGLG1 interacting proteins were identified and validated by yeast two-hybrid(Y2H)and bimolecular fluorescence complementation(BiFC). The results showed that SOD,POD and CAT activities ofStRGLG1overexpression plants increased by 31.78%,46.87% and 51.76% on average,and MDA content decreased by 23.12%. SOD,POD and CAT decreased by 15.83%,18.28% and 13.78% respectively,while MDA content increased by 13.30% under drought stress. It was proved thatStRGLG1gene played a role in the regulation of potato drought tolerance. Y2H and BiFC results showed that StRGLG1 and StERF53 proteins interact. These findings indicate thatStRGLG1gene expression plays a role in potato stress resistance,and the results can provide references for the molecular mechanism ofStRGLG1regulation of potato drought stress response.

Key words: potato, StRGLG1, drought stress, protein interaction