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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (11): 2483-2494.doi: 10.16420/j.issn.0513-353x.2023-1008

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

Cloning and Functional Analysis of FaGH3.17 Gene in Strawberry

YANG Juanbo, GUO Lili, LU Shixiong, GOU Huimin, WANG Shuaiting, ZENG Baozhen, MAO Juan*()   

  1. Collage of Horticulture,Gansu Agricultural University,Lanzhou 730000,China
  • Received:2024-07-18 Revised:2024-08-29 Online:2024-12-12 Published:2024-11-25
  • Contact: MAO Juan

Abstract:

In order to study the response of GH3.17 gene to salt stress in strawberry,the evolutionary relationship and physicochemical properties of FaGH3.17 were analysed using bioinformatics,and the gene was cloned and subsequently subcellularly localised in tobacco and heterologously overexpressed in Arabidopsis to verify its function in salt stress. The results showed that FaGH3.17 is an acidic and unstable hydrophobic,non-secretory protein,and the analysis of the evolutionary relationship of species revealed that FaGH3.17 is the closest relative to Potentilla anserina. Subcellular localisation in tobacco revealed that FaGH3.17 was mainly localised in the nucleus and cell membrane. Heterologously overexpression analysis in Arabidopsis thaliana revealed that under salt stress,the conductivity,MDA and H2O2 content were higher than those of wild-type plants,which were elevated by 15.43%,42.97%,and 18.86%,respectively,whereas the Pro content,POD,SOD,and CAT activities were significantly lower than those of the wild-type plants,which were reduced by 13.28%,15.42%,14.22%,19.87%,respectively. And the relative expression of salt-responsive genes were all significantly reduced. It was shown that heterologous overexpression of FaGH3.17 significantly reduced the antioxidant enzyme activities and osmoregulatory substance contents in Arabidopsis,which predicts that GH3.17 may attenuate the salt tolerance of plants.

Key words: strawberry, gene cloning, salt stress, functional verification