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
作者： Luo, Tao 1 ; Shuai, Liang 1 ; Liao, Lingyan 2 ; Li, Jing 1 ; Duan, Zhenhua 2 ; Guo, Xiaomeng 1 ; Xue, Xiaoqing 1 ; Han, D 1 ;
作者机构： 1.South China Agr Univ, Engn Res Ctr Postharvest Technol Hort Crops South, Guangdong Prov Key Lab Postharvest Sci Fruits & V, Coll Hort,Minist Educ, Guangzhou 510642, Guangdong, Peoples R China
2.Hezhou Univ, Inst Food Sci & Engn Technol, Coll Food & Biol Engn, Hezhou 542899, Guangxi, Peoples R China
3.Guangdong Acad Agr Sci, Key Lab South Subtrop Fruit Biol & Genet Resource, Inst Fruit Tree Res, Minist Agr, Guangzhou 510640, Guangdong, Peoples R China
4.Guangdong Litchi Engn Res Ctr, Guangzhou 510642, Guangdong, Peoples R China
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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