Soluble Acid Invertases Act as Key Factors Influencing the Sucrose/Hexose Ratio and Sugar Receding in Longan (Dimocarpus longan Lour.) Pulp

文献类型： 外文期刊

第一作者： Luo, Tao

作者： Luo, Tao;Shuai, Liang;Li, Jing;Guo, Xiaomeng;Xue, Xiaoqing;Wu, Zhenxian;Shuai, Liang;Liao, Lingyan;Duan, Zhenhua;Han, Dongmei;Wu, Zhenxian

作者机构：

关键词： Dimocarpus longan Lour.; soluble acid invertases; sucrose/hexose ratio; sugar receding; sucrose metabolism

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2019 年 67 卷 1 期

页码：

收录情况： SCI

摘要： Soluble acid invertases (SAIs) cleave sucrose into hexose in vacuoles and play important roles in influencing fruit quality. However, their potential roles in regulating sugar composition and the "sugar receding" process of longan fruits lacked systematic investigations. Our results showed that sucrose/hexose ratios and sugar receding rates of longan pulp varied among cultivars. Analysis of enzymes for sucrose synthesis and cleavage indicated that DlSAI showed the highest negative correlation with sucrose/hexose ratio at both of activity and expression level. Moreover, high SAI activity and DlSAI expression resulted in extremely low sucrose/hexose ratio in 'Luosanmu' longan from development to mature stages and a remarkable loss of sugar in 'Shixia' longan fruits during on-tree preservation. In conclusion, DlSAIs act as key factors influencing sucrose/hexose ratio and sugar receding through transcriptional and enzymatic regulations. These results might help improve the quality of on-tree preserved longan.

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