数字农科院2.0

Application of dihydroquercetin reduces oxidative damage and enhances drought resistance in wheat

文献类型： 外文期刊

作者： 王琦玉;郭佳庆;许成杰;唐文思;陈凯;王玉龙;周永斌;陈隽;徐兆师;王曙光;马有志;陈明;孙黛珍

作者机构：

关键词： Wheat;Drought stress;Dihydroquercetin;Transcriptome analysis;Antioxidant;Membrane

期刊名称： ACTA PHYSIOLOGIAE PLANTARUM

ISSN： 0137-5881

年卷期： 2025 年 47 卷 11 期

页码：

收录情况： SCIE（2025版）

摘要： Drought stress is one of the main abiotic stressors affecting wheat yield. In recent years, plant-derived compounds have played a key role in improving wheat stress resistance and have been widely used to enhance crop drought resistance and yield. Currently, flavonoids, as important secondary metabolites in plants, are related to drought resistance. In this study, we found through screening that the flavonoid compound dihydroquercetin can improve the drought resistance of wheat. The results indicate that exogenous dihydroquercetin can significantly improve the survival rate, relative water content, fresh weight, and dry weight of wheat seedlings under drought conditions. Biochemical assays combined with transcriptome analysis demonstrate that under drought stress, dihydroquercetin simultaneously enhances antioxidant capacity and upregulates the expression of beta-glucosidase (BGLU2) and aldehyde dehydrogenase (ALDH) in the phenylpropanoid biosynthesis pathway. These changes collectively enhance the antioxidant capacity of wheat and reduce the content of superoxide anions and hydrogen peroxide. Dihydroquercetin also upregulated the expression of important genes in the glycerophospholipid metabolism pathway, including phospholipase D (PLD), no special phospholipase C (NPC), and glycerophosphodiesterase (GDPD), alleviating damage to the cell membrane, reducing malondialdehyde content. Therefore, the application of dihydroquercetin improves drought resistance in wheat by promoting antioxidant capacity and alleviating drought-induced oxidative damage. This study lays the groundwork for implementing dihydroquercetin to boost wheat's drought resilience in agricultural settings.

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