Parental drought priming enhances tolerance to low temperature in wheat (Triticum aestivum) offspring

文献类型： 外文期刊

第一作者： Guo, Junhong

作者： Guo, Junhong;Liu, Shengqun;Li, Xiangnan;Wang, Hongyan;Wang, Yongjun;Liu, Fulai;Guo, Junhong;Li, Xiangnan;Li, Xiangnan

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关键词： antioxidant capacity; carbohydrate metabolism; drought priming; low temperature; osmotic adjustment; photosynthesis; transgenerational effects; Triticum aestivum

期刊名称：FUNCTIONAL PLANT BIOLOGY （ 影响因子：2.812； 五年影响因子：3.291 ）

ISSN： 1445-4408

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收录情况： SCI

摘要： Low temperature is one of the major environmental stresses that limit crop growth and grain yield in wheat (Triticum aestivum L.). Drought priming at the vegetative stage could enhance wheat tolerance to later cold stress; however, the transgenerational effects of drought priming on wheat offspring's cold stress tolerance remains unclear. Here, the low temperature responses of offspring were tested after the parental drought priming treatment at grain filling stage. The offspring plants from parental drought priming treatment had a higher abscisic acid (ABA) level and lower osmotic potential (Psi o) than the control plants under cold conditions. Moreover, parental drought priming increased the antioxidant enzyme activities and decreased hydrogen peroxide (H2O2) accumulation in offspring. In comparison to control plants, parental drought priming plants had a higher ATP concentration and higher activities of ATPase and the enzymes involved in sucrose biosynthesis and starch metabolism. The results indicated that parental drought priming induced low temperature tolerance in offspring by regulating endogenous ABA levels and maintaining the redox homeostasis and the balance of carbohydrate metabolism, which provided a potential approach for cold resistant cultivation in wheat.

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