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Effects of exogenous glucose on seed germination and antioxidant capacity in wheat seedlings under salt stress

文献类型： 外文期刊

作者： Hu, Mengyun 1 ; Shi, Zhigang 2 ; Zhang, Zhengbin 3 ; Zhang, Yingjun 1 ; Li, Hui 1 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, Hebei Prov Lab Crop Genet & Breeding, Inst Cereal & Oil Crops, Shijiazhuang 050031, Hebei, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Natl Millet Improvement Ctr China, Inst Millet Crops, Shijiazhuang 050031, Hebei, Peoples R China

3.Chinese Acad Sci, Res Ctr Agr Resource, Inst Genet & Dev Biol, Shijiazhuang 050021, Peoples R China

关键词： Antioxidant;Germination;Glucose;Salt stress;Seed;Seedling growth;Wheat (Triticum aestivum L.)

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.412； 五年影响因子：3.691 ）

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收录情况： SCI

摘要： Glucose (Glc) is an essential signaling molecule that controls plant development and gene expression, but little is known about its role in salt stress resistance on seed germination and plant growth. Here we report the effects of exogenous Glc on wheat seed germination and seedling growth under salt stress. The treatments used were 0 and 200 mM NaCl solutions supplemented with each of four Glc concentrations of 0, 0. 1, 0. 5 and 50 mM. The results showed that salt alone significantly inhibited seeds germination and reduced the growth of wheat seedlings. Addition of exogenous Glc in the salt solution attenuated the salt stress effects in a dose-dependent manner of Glc, as indicated by enhancement of the growth of celoeptile and radicle. Glc addition also showed significant reversal of salt stress in chlorophyll decay, water loss, dry weight, root length and accumulation of proline. The Glc-induced salt stress resistance was associated with enhanced K ~+ and K ~+/Na ~+ ratio in leaves, and activated antioxidant enzymes activities, thus decreasing thiobarbituric acid reactive substances (TBARS) and malondialdehyde (MDA) contents. As our knowledge this is the first report to show the protective effects of exogenous Glc against salt-induced oxidative damage in wheat seedlings associating with the evidences of ion homeostasis in cells and a better antioxidant system.

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