Changes in carbohydrates and organic acids in leaves and mesocarp tissues during melon (Cucumis melo L.) fruit development

文献类型： 外文期刊

第一作者： Fu, Q. S.

作者： Fu, Q. S.;Zhang, X. Y.;Zhu, H. Q.;Lv, L. H.;Wang, H. S.

作者机构：

关键词： Fructose;glucose;sucrose;galactose;raffinose;citric acid;malic acid

期刊名称：CUCURBITACEAE 2012: PROCEEDINGS OF THE XTH EUCARPIA MEETING ON GENETICS AND BREEDING OF CUCURBITACEAE

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年卷期： 2012 年

页码：

收录情况： SCI

摘要： Levels of carbohydrates and organic acids were examined in leaves (source) and mesocarp tissues (sink) of two melon genotypes during fruit development. Total soluble sugars in source leaves were much lower in the early stage of fruit development and increased significantly in the late stage of fruit development. Hexoses (glucose plus fructose) and sucrose made up the bulk of the soluble sugars in leaves. Malic acid was the main organic acid in leaves, the level of malic acid in leaves was higher than citric acid during fruit development. Total soluble sugars in mesocarp tissues were significantly higher than in leaves. Total soluble sugars in mesocarp tissues increased gradually during fruit development. The increase in total soluble sugars mainly resulted from the accumulation of fructose, glucose and sucrose. Sucrose showed a dramatic increase in later stage of fruit development. Levels of galactose and raffinose were much lower. Levels of organic acids in fruits were very low. Citric acid in mesocarp tissues increased during fruit development while malic acid decreased. Citric acid was the main organic acid in mature melon fruit. In our study, low levels of soluble sugars in leaves in the early stage of fruit development indicated that an increase in sink demand enhanced photoassimilate export from source leaves.

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