Sucrose Metabolism and Changes of Relative Enzymes in Mangifera indica L. 'Irwin'

文献类型： 外文期刊

第一作者： Wei, Chang-bin

作者： Wei, Chang-bin;Wu, Hong-xia;Ma, Wei-hong;Wang, Song-biao;Sun, Guang-ming

作者机构：

关键词： 'Irwin';sugar accumulation;invertase;sucrose synthase;sucrose phosphate synthase

期刊名称：IX INTERNATIONAL MANGO SYMPOSIUM

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： To understand the sucrose metabolism in 'Irwin' mango (Mangifera indica L. 'Irwin') and reveal how the relative enzymes change in this metabolic process, we monitored the changes in soluble sugar content, activities of metabolic relative enzymes, titratable acid concentration, starch content and activities of amylase from green ripe stage to commercial ripe stage. In the fruit of 'Irwin' mango, the contents of soluble sugars were determined to be sucrose (81.79 mg/g)> fructose (30.15 mg/g)> glucose (9.95 mg/g). There was no obvious difference in the activities of acid invertase (Al), neutral invertase (NI), sucrose synthase (SS), sucrose phosphate synthase (SPS) before harvest, but did in the postharvest ripening period where the activities of Al, SS, SPS rose remarkably, SPS activity even peaked, while NI activity just increased slightly. After harvest, glucose content presented a rise-fall trend; fructose content increased gently, and showed a sharp ascent after harvest; sucrose content rose slightly before harvest, and accumulated rapidly even peaked after harvest. These results suggest that the key period of sugar metabolism in 'Irwin' mango is post harvest stage, where the sucrose accumulation accounts for the most and SPS acts crucial role.

分类号： S6

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