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Endogenous Auxin Content Contributes to Larger Size of Apple Fruit

文献类型： 外文期刊

作者： Bu, Haidong 1 ; Yu, Wenquan 2 ; Yuan, Hui 1 ; Yue, Pengtao 1 ; Wei, Yun 1 ; Wang, Aide 1 ;

作者机构： 1.Shenyang Agr Univ, Coll Hort, Key Lab Fruit Postharvest Biol, Shenyang, Peoples R China

2.Heilongjiang Acad Agr Sci, Mudanjiang Branch, Mudanjiang, Peoples R China

关键词： apple; fruit size; cell size; auxin; MdTAR1; MdYUCCA6

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Fruit size is an important economic trait that is controlled by multiple genes. However, the regulatory mechanism for fruit size remains poorly understood. A bud sport variety of "Longfeng" (LF) apple (Malus domestica) was identified and named "Grand Longfeng" (GLF). The fruit size of GLF is larger than that of LF, and both varieties are diploid. We found that the cell size in GLF fruit was larger than that of LF. Then, we compared the fruit transcriptomes of the two varieties using RNA-Seq technology. A total of 1166 differentially expressed genes (DEGs) were detected between GLF and LF fruits. The KEGG analysis revealed that the phytohormone pathway was the most enriched, in which most of the DEGs were related to auxin signaling. Moreover, the endogenous auxin levels of GLF fruit were higher than those of LF. The expressions of auxin synthetic genes, including MdTAR1 and MdYUCCA6, were higher in GLF fruit than LF. Collectively, our findings suggest that auxin plays an important role in fruit size development.

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