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

第一作者： Shi, Kai

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

作者机构：

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 ）

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年卷期：

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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.

分类号： Q945

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