期刊
MOLECULAR BIOLOGY REPORTS
卷 49, 期 12, 页码 11635-11641出版社
SPRINGER
DOI: 10.1007/s11033-022-07915-y
关键词
ZjGRF1; Seagrass; 14-3-3; Copper stress; Zostera japonica; Arabidopsis thaliana
资金
- Natural Science Foundation of Guangxi Province [2020GXNSFAA297067]
- Research Fund Program of the Guangxi Key Lab of Mangrove Conservation and Utilization [GKLMC-21A01, GKLMC-20A04, GKLMC-20A01, 662]
- National Natural Science Foundation of China [32170399]
- National Science & Technology Fundamental Resources Investigation Program of China [2019FY100604]
By analyzing the physiological function and molecular mechanism of the ZjGRF1 gene in Arabidopsis response to copper stress, this study found that ZjGRF1 can enhance the plant's resistance to copper stress, increase antioxidant enzyme activity, and increase copper efflux while reducing uptake.
Background Copper is both a nutrient essential for plant growth and a pollutant. In recent decades, with the rapid development of industrial and agricultural production, copper has been used more and more widely, and its consumption has also increased rapidly. Excessive soil copper contents induce phytotoxicity, affecting plant growth, development and yields. Moreover, copper can accumulate in crops and enter the food chain through enrichment, harming human health. Methods and results In this study, Arabidopsis wild-type (WT) and Zostera japonica 14-3-3 gene ZjGRF1 overexpression lines were used to explore the physiological function and molecular mechanism of ZjGRF1 in Arabidopsis in the copper stress response. Under copper stress, compared with WT plants, transgenic ZjGRF1 Arabidopsis plants exhibited less inhibition of root growth and development and had higher fresh weights. Under copper stress, the soluble sugar and soluble protein contents in transgenic ZjGRF1 Arabidopsis plants were significantly higher than those in WT plants, while the superoxide dismutase (SOD), peroxidase and catalase (CAT) activities were significantly higher than those in WT plants. Additionally, the malonaldehyde content of transgenic plants was significantly lower than that of WT plants. Furthermore, qRT-PCR results showed that under copper stress, the SOD, CAT1 and HMA5 expression levels in transgenic ZjGRF1 Arabidopsis plants were significantly higher than those in WT plants, while COPT1 expression was significantly lower than that in WT plants. Conclusions ZjGRF1 enhanced the copper stress resistance of Arabidopsis by maintaining high antioxidant enzyme activity, increasing copper efflux and reducing copper uptake under copper stress.
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