Effect of root restriction on nitrogen levels and glutamine synthetase activity in 'Kyoho' grapevines

文献类型： 外文期刊

第一作者： Yu, Xiuming

作者： Yu, Xiuming;Wang, Bo;Zhang, Caixi;Xu, Wenping;He, Jianjun;Wang, Shiping;Zhu, Lina

作者机构：

关键词： Root restriction;Grapevine;Nitrogen;Soluble protein;Glutamine synthetase;Vitis vinifera x Vitis labrusca

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2012 年 137 卷

页码：

收录情况： SCI

摘要： To unravel the inhibition of root restriction on shoot growth, the changes of nitrogen levels and glutamine synthetase (GS, EC 6.3.1.2) activity were investigated in four-year-old root-restricted 'Kyoho' grapevines (Vitis vinifera x Vitis labrusca) in greenhouse from veraison up until 62 days after harvest. 'Kyoho' grapevines were planted in buried bed as root restriction and in raised bed (unrestricted rooting zone) as the control. Results showed that root restriction significantly decreased the total amount of N in leaves, berry flesh, white and brown roots, (NO3- + NO2-)-N content in leaves, white and brown roots, and NH4+-N content in brown roots. In addition, root restriction reduced not only N remobilization and recycling from leaves to roots after harvest, but also the total GS activity in both leaves and roots, suggesting that root restriction has a negative influence on glutamine synthesis in grapevines. However, soluble protein content in both leaves and white roots significantly increased under root restriction from 118 to 180 days after anthesis (DAA). It can be attributed to the increased synthesis of polypeptides and/or the enhanced de novo synthesis of proteins in root-restricted vines. In summary, the results illustrated less N reserve in root-restricted vines, which might be responsible for shoot growth inhibition under root restriction. (C) 2012 Elsevier B.V. All rights reserved.

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