Assessment of Sugar Components and Genes Involved in the Regulation of Sucrose Accumulation in Peach Fruit

文献类型： 外文期刊

第一作者： Vimolmangkang, Sornkanok

作者： Vimolmangkang, Sornkanok;Zheng, Hongyu;Peng, Qian;Fang, Ting;Liao, Liao;Wang, Lu;Han, Yuepeng;Vimolmangkang, Sornkanok;Jiang, Quan;Wang, Huiliang;He, Huaping;Liao, Liao;Han, Yuepeng;Han, Yuepeng

作者机构：

关键词： Prunus persica;soluble sugar;sweetness;sucrose metabolic genes;sugar transporter genes

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：

年卷期：

页码：

收录情况： SCI

摘要： Soluble sugar contents in mature fruits of 45 peach accessions were quantified using gas chromatography analysis. Sucrose is the predominant sugar in mature fruit, followed by glucose and fructose, which have similar concentrations. Overall, sucrose metabolism and accumulation are crucial determinants of sugar content in peach fruit, and there is a wide range of sucrose concentrations among peach genotypes. To understand the mechanisms regulating sucrose accumulation in peach fruit, expression profiles of genes involved in sucrose metabolism and transport were compared among four genotypes. Two sucrose-cleaving enzyme genes (SUS4 and NINV8), one gene involved in sucrose resynthesis (SPS3), and three sugar transporter genes (SUT2, SUT4, and TMT2) were prevalently expressed in peach fruit, and their expression levels are significantly correlated with sucrose accumulation. In contrast, the VAINV genes responsible for sucrose cleavage in the vacuole were weakly expressed in mature fruit, suggesting that the sucrose-cleaving reaction is not active in the vacuole of sink cells of mature peach fruit. This study suggests that sucrose accumulation in peach fruit involves the coordinated interaction of genes related to sucrose cleavage, resynthesis, and transport, which could be helpful for future peach breeding.

分类号： R15`S

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