With global climate change, waterlogging stress is becoming more frequent. Waterlogging stress inhibits root growth and physiological metabolism, which ultimately leads to yield loss in wheat. Waterlogging priming has been proven to effectively enhance waterlogging tolerance in wheat. However, it is not known whether waterlogging priming can improve the offspring’s waterlogging resistance. Here, wheat seeds that applied waterlogging priming for one generation, two generations and three generations are separately used to test the hypoxia stress tolerance in wheat, and the physiological mechanisms are evaluated. Results found that progeny of primed plants showed higher plant biomass by enhancing the net photosynthetic rate and antioxidant enzyme activity. Consequently, more sugars are transported to roots, providing a metabolic substrate for anaerobic respiration and producing more ATP to maintain the root growth in the progeny of primed plants compared with non-primed plants. Furthermore, primed plants’ offspring promote ethylene biosynthesis and further induce the formation of a higher rate of aerenchyma in roots. This study provides a theoretical basis for improving the waterlogging tolerance of wheat.

中文翻译：

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涝渍引发通过调节根系表型和生理适应增强小麦后代植物的缺氧胁迫耐受性

随着全球气候变化，内涝压力越来越频繁。涝渍胁迫抑制根系生长和生理代谢，最终导致小麦减产。涝渍引发已被证明能有效提高小麦的耐涝性。但浸水引发是否能提高后代的抗涝能力尚不清楚。在这里，分别用1代、2代和3代浸水引发的小麦种子测试了小麦对缺氧胁迫的耐受性，并对其生理机制进行了评价。结果发现，通过提高净光合速率和抗氧化酶活性，致敏植物的后代表现出更高的植物生物量。因此，更多的糖分被运输到根部，为厌氧呼吸提供代谢底物并产生更多的 ATP 以维持与未引发植物相比，引发植物后代的根系生长。此外，致敏植物的后代促进乙烯生物合成并进一步诱导根部形成更高比率的通气组织。该研究为提高小麦耐涝性提供了理论依据。