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Sugar transporters PpSWEET9a and PpSWEET14 synergistically mediate peach sucrose allocation from source leaves to fruit

文献类型： 外文期刊

作者： Luo, Min 1 ; Jia, Mengxiao 1 ; Pan, Lin 1 ; Chen, Weifeng 2 ; Zhou, Kun 1 ; Xi, Wanpeng 1 ;

作者机构： 1.Southwest Univ, Coll Hort & Landscape Architecture, Key Lab Agr Biosafety & Green Prod Upper Yangtze R, Minist Educ, Chongqing, Peoples R China

2.Hunan Acad Agr Sci, Hunan Hort Res Inst, Changsha, Peoples R China

期刊名称：COMMUNICATIONS BIOLOGY （ 影响因子：5.1； 五年影响因子：5.8 ）

ISSN：

年卷期： 2024 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Sugar content is a critical indicator of fruit quality and is mainly controlled by sugar transporters. Sugars will eventually be exported transporters (SWEET) proteins play an indispensable role in sugar allocation between and within plant organs. Sucrose is the major sugar in many fruits and the predominant form of sugar translocated in peach (Prunus persica). However, the role of the multiple peach SWEET genes in sucrose allocation to fruit remains elusive. In this study, a total of 19 SWEET candidates have been identified in the peach genome, and two Clade III SWEET genes, PpSWEET9a and PpSWEET14, are found to be highly expressed in mature source leaves and branches. Complementation assays, transgene manipulations, and protein interaction studies reveal that PpSWEET9a and PpSWEET14 serve as sucrose efflux proteins and form a heterooligomer that synergistically directs sucrose allocation from source leaves to fruits. Our findings provide insights into the effect of SWEETs on sugar accumulation in peach fruit and identify genetic candidates for improving fruit quality. PpSWEET9a and PpSWEET14 function as sucrose efflux proteins in peach by forming a heterooligomer that synergistically facilitates the allocation of sucrose from source leaves to fruits.

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