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OsLOX1 positively regulates seed vigor and drought tolerance in rice

文献类型： 外文期刊

作者： Weng, Yahong 1 ; Wang, Yanwen 1 ; Wang, Kewu 1 ; Wu, Fangxi 2 ; Wei, Yidong 2 ; Jiang, Jiahuang 2 ; Zhu, Yongsheng 2 ; Wang, Fuxiang 1 ; Xie, Hongguang 2 ; Xiao, Yanjia 2 ; Cai, Qiuhua 2 ; Xie, Huaan 1 ; Zhang, Jianfu 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Agron, Fuzhou 350002, Peoples R China

2.Fujian Acad Agr Sci, Rice Res Inst, Fuzhou 350018, Peoples R China

3.Minist Agr & Affairs, Natl Rice Improvement Ctr China,Incubator Natl Key, State Key Lab Ecol Pest Control Fujian & Taiwan Cr, Key Lab Germplasm Innovat & Mol Breeding Hybrid Ri, Fuzhou 350003, Peoples R China

4.Minist Sci & Technol, Minist Agr & Affairs,Fuzhou Branch, Natl Rice Improvement Ctr China, Fujian Engn Lab Crop Mol Breeding,Fujian Key Lab R, Fuzhou 350003, Peoples R China

关键词： Lipoxygenase OsLOX1; H2O2; Catalase; Free fatty acid; Rice

期刊名称：PLANT MOLECULAR BIOLOGY （ 影响因子：3.8； 五年影响因子：4.6 ）

ISSN： 0167-4412

年卷期： 2025 年 115 卷 1 期

页码：

收录情况： SCI

摘要： The lipoxygenase (LOX) gene family is widely distributed in plants, and its activity is closely associated with seed viability and stress tolerance. In this study, we cloned the rice(Oryza sativa)lipoxygenase gene OsLOX1, a key participant in the 13-lipoxygenase metabolic pathway. Our primary focus was to investigate its role in mediating responses to drought stress and seed germination in rice. Histochemical staining and qPCR analysis indicated that the expression level of OsLOX1 was relatively high in leaves and early germinating seeds. Our findings revealed that mutant lines with CRISPR/Cas9-induced knockout of OsLOX1 exhibited reduced tolerance to drought stress compared with the wild-type. This was accompanied by elevated levels of H2O2 and malondialdehyde, and a decrease in the expression levels of genes associated with antioxidant enzymes. Furthermore, knockout of OsLOX1 reduced the longevity of rice seeds increased H2O2 and MDA levels, and decreased the activities of the antioxidant enzymes superoxide dismutase and catalase, compared with the wild-type. These findings demonstrated that OsLOX1 positively regulated rice seed vigor and drought stress.

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