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Changes in sugar content and relative enzyme activity in grape berry in response to root restriction

文献类型： 外文期刊

作者： Xie, ZhaoSen 1 ; Li, Bo 1 ; Forney, Charles F. 3 ; Xu, WenPing 1 ; Wang, ShiPing 1 ;

作者机构： 1.Shanghai Jiao Tong Univ, Coll Agr & Biol, Dept Plant Sci, Shanghai 200240, Peoples R China

2.Shandong Inst Pomol, Tai An 271000, Shandong, Peoples R China

3.Agr & Agri Food Canada, Atlantic Food & Hort Res Ctr, Kentville, NS, Canada

关键词： Organic acid;Metabolism;Invertase;SPS;SS

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： 2009 年 123 卷 1 期

页码：

收录情况： SCI

摘要： Root restriction often depresses photosynthetic capacity and reduces shoot growth, but the photosynthate accumulation in fruit under restriction is higher than in control fruit. However, changes in metabolism responsible for these differences are unclear. To identify the metabolic mechanism by which root restriction affects sugar accumulation in fruit of 'Kyoho' grape (Vitis vinifera x V. labruscana). sugar metabolism and related enzyme activities in grape berries produced with and without root restriction were compared. Total sugar content of fruit produced under root restriction was higher than that of control fruit. Acid invertase (AI, EC 3.2.1.26) activity, which increases with berry development, was significantly higher in root-restricted berries than in control berries. Neutral invertase (NI, EC 3.2.1.26) activity showed a similar trend to AI, but the amount of NI activity was lower than AI in both treatments. Sucrose phosphate synthase (SPS, EC 2.4.1.14) and sucrose synthase (SS, EC 2.4.1.13) activity changed slightly with berry development, and there was no significant difference in SS and SPS activity between root restriction and control treatments. Therefore, AI appears to be the key enzyme induced by root restriction that explains the higher sugar content found in grape berry produced under root restriction. (C) 2009 Elsevier B.V. All rights reserved.

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