Effects of melatonin pretreatment on drought resistance of strawberry seedlings

doi:10.14088/j.cnki.issn0439-8114.2023.08.015

Abstract

Abstract: In order to study the effects of melatonin pretreatment on drought resistance of strawberry seedlings, strawberry seedlings were treated with different concentrations of melatonin in “spray+root irrigation” pre-culture before drought treatment. The results showed that drought severely inhibited strawberry growth. Medium and low concentration（100~200 μmol/L） melatonin pretreatment could effectively alleviate the growth stress caused by drought on strawberry seedlings, enhance the activities of superoxide dismutase（SOD）, peroxidase（POD） and catalase（CAT）, and inhibit the production of hydrogen peroxide （H₂O₂） and malondialdehyde（MDA）. Meanwhile, drought stress increased the expression levels of stress-related genes in strawberry seedlings, and exogenous melatonin pretreatment could further enhance the expression levels and significantly affect the expression of key enzyme genes of the melatonin synthesis pathway, so as to improve the drought resistance of the strawberry.

Key words: strawberry seedling, melatonin, drought stress, antioxidant, stress gene expression

CLC Number:

GOU Yi-jie, YANG Zhen-hua. Effects of melatonin pretreatment on drought resistance of strawberry seedlings[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(8): 95-101.

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