Sulfur dioxide promotes wheat seed germination under drought stress and regulates antioxidant metabolism in wheat

文献类型： 外文期刊

第一作者： Liu, Nan-Nan

作者： Liu, Nan-Nan;Lu, Zi-Xu;Guo, Xi-Kai;Yao, Gai-Fang;Hu, Kang-Di;Zhang, Hua;Zhou, Gui-Lin;Xuan, Yi-Ran;Wang, Zhi-Yan;Yu, Zhi-Kun;Xu, Rong-Fang

作者机构：

关键词： antioxidants; drought stress; germination; sulfur dioxide; Triticum aestivum

期刊名称：BIOLOGIA PLANTARUM （ 影响因子：0.9； 五年影响因子：1.3 ）

ISSN： 0006-3134

年卷期： 2025 年 69 卷

页码：

收录情况： SCI

摘要： Sulfur dioxide (SO2) is a potential signaling molecule, playing a crucial role in regulating multiple physiological processes in organisms. In the present study, we investigate the impact of SO2 on the germination rate of wheat seed subjected to drought stress. Drought stress was stimulated using polyethylene glycol 6000, and the findings revealed that SO2 pretreatment significantly enhanced the germination rate of wheat grain. Additionally, SO2 pretreatment resulted in increased levels of reducing sugars and soluble proteins, as well as elevated amylase activity. Furthermore, SO2 pretreatment of wheat grain significantly reduced the content of superoxide anion, hydrogen peroxide, and malondialdehyde, while increasing the activities of peroxidase (POD), ascorbate peroxidase and catalase. Additionally, SO2 pretreatment was associated with a decrease in lipoxygenase activity and an increase in the levels of endogenous hydrogen sulfide. Principal component analysis revealed that POD is the most influential factor in the seed germination process. These findings suggest that SO2 pretreatment may enhance the germination of wheat grain under drought conditions by facilitating the mobilization of storage materials and improving antioxidant capacity during the germination phase.

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