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

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

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 sucr...

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Veröffentlicht in:Journal of agricultural and food chemistry 2019-01, Vol.67 (1), p.352-363
Hauptverfasser: Luo, Tao, Shuai, Liang, Liao, Lingyan, Li, Jing, Duan, Zhenhua, Guo, Xiaomeng, Xue, Xiaoqing, Han, Dongmei, Wu, Zhenxian
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container_issue 1
container_start_page 352
container_title Journal of agricultural and food chemistry
container_volume 67
creator Luo, Tao
Shuai, Liang
Liao, Lingyan
Li, Jing
Duan, Zhenhua
Guo, Xiaomeng
Xue, Xiaoqing
Han, Dongmei
Wu, Zhenxian
description 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.
doi_str_mv 10.1021/acs.jafc.8b05243
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title Soluble Acid Invertases Act as Key Factors Influencing the Sucrose/Hexose Ratio and Sugar Receding in Longan (Dimocarpus longan Lour.) Pulp
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