In higher plants, sugars are nutrients and important signal molecules. Sugar transporters (STs) facilitate sugar transport across membranes and are associated with loading and unloading of the conducting complex. Strawberry (Fragaria ×ananassa Duchesne ex Rozier) is one of the most economically important and widely cultivated fruit crop and a model plant among fleshy fruits worldwide. In this study, 66 woodland strawberry (F. vesca L.) ST (FvST) genes were identified and further classified into eight distinct subfamilies in the woodland strawberry genome based on the phylogenetic analysis. In the promoter sequences of FvST gene families, a search for cis‐regulatory elements suggested that some of them might probably be regulated by plant hormones (e.g., salicylic acid, abscisic acid, and auxin), abiotic (e.g., drought, excessive cold, and light), and biotic stress factors. Exon–intron analysis showed that each subfamily manifested closely associated gene architectural features based on similar number or length of exons. Moreover, to comprehend the potential evolution mechanism of FvST gene family, the analysis of genome duplication events was performed. The segmental and tandem duplication analysis elucidated that some of ST genes arose through whole‐genome duplication (WGD) or segmental duplication, accompanied by tandem duplications. The expression analysis of 24 FvST genes in vegetative and during fruit development has shown that the expression of several ST genes was tissue and developmental stage specific. Generally, our findings are important in understanding of the allocation of photo assimilates from source to sink cell and provide insights into the genomic organization and expression profiling of FvST gene families in woodland strawberry.

中文翻译：

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林地草莓中糖转运蛋白家族基因的全基因组表征和表达分析。

在高等植物中，糖是营养物质和重要的信号分子。糖转运蛋白（ST）促进糖跨膜转运，并与传导复合物的装载和卸载有关。草莓（Frazaria×ananassa Duchesne ex Rozier）是经济上最重要，栽培最广泛的水果作物之一，也是世界上多肉水果中的典范植物。在这项研究中，鉴定了66个林地草莓（F. vesca L.）ST（FvST）基因，并根据系统发育分析将其进一步分为林地草莓基因组中的八个不同的亚科。在FvST基因家族的启动子序列中，搜索顺式调节元素表明其中一些可能受植物激素（例如水杨酸，脱落酸和生长素），非生物（例如干旱，过度寒冷和光照）和生物胁迫因素的调节。外显子-内含子分析表明，基于相似的外显子数目或长度，每个亚科均表现出紧密相关的基因结构特征。此外，为了了解FvST基因家族的潜在进化机制，进行了基因组复制事件的分析。分段和串联重复分析表明，一些ST基因是通过全基因组重复（WGD）或分段重复并伴随串联重复而产生的。营养和果实发育过程中24个FvST基因的表达分析表明，几个ST基因的表达具有组织和发育阶段特异性。通常，我们的发现对于理解从源到沉细胞的光同化物的分配非常重要，并为深入了解林地草莓FvST基因家族的基因组组织和表达谱提供了见识。