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Decreased energy synthesis is partially compensated by a switch to sucrose synthase pathway of sucrose degradation in restricted root of tomato plants

文献类型: 外文期刊

作者: Shi, Kai 1 ; Fu, Li-Jun 1 ; Dong, De-Kun 3 ; Zhou, Yan-Hong 1 ; Yu, Jing-Quan 1 ;

作者机构: 1.Zhejiang Univ, Dept Hort, Hangzhou 310029, Zhejiang, Peoples R China

2.Agr Minist China, Key Lab Hort Plants Growth Dev & Biotechnol, Hangzhou 310029, Zhejiang, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310021, Zhejiang, Peoples R China

关键词: Alternative pathway respiration;Carbohydrate;Cytochrome pathway respiration;Invertase;Photosynthesis;LYCOPERSICON-ESCULENTUM MILL;ALTERNATIVE OXIDASE;OXYGEN DEFICIENCY;CUCUMIS-SATIVUS;WATER RELATIONS;ZONE VOLUME;XYLEM SAP;GROWTH;HYPOXIA;METABOLISM

期刊名称:PLANT PHYSIOLOGY AND BIOCHEMISTRY ( 影响因子:4.27; 五年影响因子:4.816 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Tomato (Solanum lycopersium L) plants were grown hydroponically to investigate the changes of energy metabolism and adaptive mechanism in response to root restriction. Root restriction resulted in a significant increase in root lipid peroxidation and reduction in leaf net CO2 assimilation rate, which was accompanied by increase of alcohol dehydrogenase (ADH; EC 1.1.1.1) and lactate dehydrogenase (LDH; EC 1.1.1.27) activities. Total, cytochrome pathway, and alternative pathway respirations were all decreased in the roots after 15 days of root restriction treatment Accompanied with the decrease of ATP content, ratio of invertase/sucrose synthase activity was increased in the restricted roots together with a decrease in glucose content and an increase in fructose content. We concluded that the decreased energy synthesis under root restriction condition was partially compensated by the energy-conserving sucrose synthase pathway of sucrose metabolism. (C) 2008 Elsevier Masson SAS. All rights reserved.

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