期刊
FUNCTIONAL PLANT BIOLOGY
卷 49, 期 11, 页码 946-957出版社
CSIRO PUBLISHING
DOI: 10.1071/FP22043
关键词
antioxidant capacity; carbohydrate metabolism; drought priming; low temperature; osmotic adjustment; photosynthesis; transgenerational effects; Triticum aestivum
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA28020400]
- National Natural Science Fund for Excellent Young Scholars [31922064]
- CAS Pioneer Hundred Talents Program [C08Y194]
- Science and Technology Development Program of Jilin Province [20190201118JC, 20210402036GH]
Parental drought priming can enhance cold stress tolerance in wheat offspring by regulating endogenous ABA levels and maintaining redox homeostasis and carbohydrate metabolism.
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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