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Genome-wide identification of expansin in Fragaria vesca and expression profiling analysis of the FvEXPs in different fruit development

文献类型： 外文期刊

作者： Dong, Chao 1 ; Zou, Xiaohua 1 ; Gao, Qing-Hua 1 ;

作者机构： 1.Shanghai Acad Agr Sci SAAS, Forestry & Fruit Tree Res Inst, Shanghai Key Lab Protected Hort Technol, Shanghai 201403, Peoples R China

关键词： Strawberry; Bioinformatics analysis; Expression levels; Fruit softening

期刊名称：GENE （ 影响因子：3.913； 五年影响因子：3.48 ）

ISSN： 0378-1119

年卷期： 2022 年 814 卷

页码：

收录情况： SCI

摘要： Strawberry is a highly efficient and economical horticultural crop plant, and strawberry fruits are easy to soften after ripening and decay after harvest, which severely impacts the economic benefits. Expansins are plant cell wall loosening proteins involved in the process of fruit softening, loosening cell walls and reducing fruit firmness. In this study, 35 FvEXPs genes were identified in the F. vesaca genome. These genes were divided into four subfamilies (27 FvEXPAs, 5 FvEXPBs, 1 FvEXLAs, and 2 FvEXLBs) and were unevenly distributed on 7 chromosomes. Gene structure and motif analysis showed the conserved structure and motif in same subgroup, however, the different motifs and structures may reveal functional divergence of multigene family members of FvEXPs in different developmental stages of fruits. The expression profiling by RNA-seq and qRT-PCR analysis revealed that the FvEXP genes have distinct expression patterns among different stages of strawberry development and ripening. Among them, 3 genes (FvEXPA9, FvEXPA12, and FvEXPA27) were highly expressed in the ripening stage, FvEXPA9 and FvEXPA12 were especially highly expressed in turning stage, whereas FvEXPA27 was especially highly expressed in red stage. Our study provides a better understanding of the FvEXP genes, which may benefit strawberry biotechnological breeding and genetic modification for improving fruit quality and delaying fruit softening.

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