The sugar transporter system of strawberry: genome-wide identification and expression correlation with fruit soluble sugar-related traits in aFragaria x ananassagermplasm collection

文献类型： 外文期刊

第一作者： Liu, Hai-Ting

作者： Liu, Hai-Ting;Ji, Ying;Liu, Ya;Tian, Shu-Hua;Gao, Qing-Hua;Zou, Xiao-Hua;Yang, Jing;Dong, Chao;Tan, Jia-Hui;Duan, Ke;Liu, Hai-Ting;Ji, Ying;Gao, Qing-Hua;Ni, Di-An;Tan, Jia-Hui

作者机构：

期刊名称：HORTICULTURE RESEARCH （ 影响因子：6.793； 五年影响因子：6.589 ）

ISSN： 2662-6810

年卷期： 2020 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Sugar from plant photosynthesis is a basic requirement for life activities. Sugar transporters are the proteins that mediate sugar allocation among or within source/sink organs. The transporters of the major facilitator superfamily (MFS) targeting carbohydrates represent the largest family of sugar transporters in many plants. Strawberry (Fragaria x ananassaDuchesne) is an important crop appreciated worldwide for its unique fruit flavor. The involvement of MFS sugar transporters (STs) in cultivated strawberry fruit sugar accumulation is largely unknown. In this work, we characterized the genetic variation associated with fruit soluble sugars in a collection including 154 varieties. Then, a total of 67STgenes were identified in the v4.0 genome integrated with the v4.0.a2 protein database ofF. vesca, the dominant subgenome provider for modern cultivated strawberry. Phylogenetic analysis updated the nomenclature of strawberry ST homoeologs. Both the chromosomal distribution and structural characteristics of the ST family were improved. Semi-RT-PCR analysis in nine tissues from cv. Benihoppe screened 34 highly expressedSTgenes in fruits. In three varieties with dramatically differing fruit sugar levels, qPCR integrated with correlation analysis betweenSTtranscript abundance and sugar content identified 13 sugar-correlated genes. The correlations were re-evaluated across 19 varieties, including major commercial cultivars grown in China. Finally, a model of the contribution of the sugar transporter system to subcellular sugar allocation in strawberry fruits was proposed. Our work highlights the involvement of STs in controlling strawberry fruit soluble sugars and provides candidates for the future functional study of STs in strawberry development and responses and a new approach for strawberry genetic engineering and molecular breeding.

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