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- Title
脱落酸通过提高抗氧化酶活性与基因表达参与富氢水增强番茄幼苗抗旱性.
- Authors
闫梅; 姚彦东; 牟开萍; 淡媛媛; 李伟泰; 廖伟彪
- Abstract
The effects of hydrogen (H2) and abscisic acid (ABA) on the resistance of tomato (So-lanum lycopersicum L.) seedlings to drought stress and their interaction were investigated by treating with 15% polyethylene glycol 6000 (PEG-6000) to simulate drought stress. The results showed that both exogenous H2 and ABA could promote the growth of tomato under drought stress, and the optimum concentrations of hydrogen-rich water (HRW, H2 donor) and ABA were 75% and 150 μmol·L-1, respectively. Drought stress HRW treatment can significantly increase the endogenous ABA content and the expression of key genes in tomato seedling leaves. At the same time, the malondialdehyde (MDA) content of tomato seedling leaves treated with HRW and ABA alone and in combination decreased by 34.8% and 34.8%, respectively, compared with PEG treatment. 32.6% and 37.0%; while the activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) and their gene expression were significantly higher than those in PEG treatment. In addition, the ABA inhibitor fluorine The effect of pyridone (FLU) on the growth of tomato seedlings under drought stress was inhibited by HRW, indicating that ABA may be required for H2 to promote the growth of tomato seedlings under drought stress. FLU inhibited the effect of HRW on the reduction of MDA content in leaves under drought stress. In addition, FLU inhibited HRW on the activities of SOD, CAT and APX in leaves under drought stress and their gene expression increases, indicating that H2 enhances the activity of antioxidant enzymes and gene expression in tomato seedlings and requires the participation of ABA. It can be seen that ABA is involved in H2 Enhance the drought resistance of tomato seedlings by inhibiting the accumulation of MDA and increasing the activity of antioxidant enzymes and their gene expression.
- Subjects
HUMAN Rights Watch (Organization); POLYETHYLENE glycol; SUPEROXIDE dismutase; ABSCISIC acid; GENE expression; DROUGHTS; TOMATOES
- Publication
Acta Agriculturae Zhejiangensis, 2022, Vol 34, Issue 9, p1901
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.2022.09.09