Gibberellin Induced Transcriptome Profiles Reveal Gene Regulation of Loquat Flowering

文献类型： 外文期刊

第一作者： Jiang, Yuanyuan

作者： Jiang, Yuanyuan;Yuan, Yuan;Jiang, Yuanyuan;Gao, Yongshun;Peng, Jiangrong;Su, Wenbing;Yang, Xianghui;Zhao, Chongbin;Wang, Man;Lin, Shunquan;Peng, Ze;Xie, Fangfang;Liu, Yicun;Gao, Yongshun;Gao, Yongshun;Su, Wenbing

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关键词： GA(3); flowering; RNA-seq; co-expression; loquat

期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.599； 五年影响因子：4.888 ）

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年卷期： 2021 年 12 卷

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收录情况： SCI

摘要： Flowering is an integral part of the life cycle of flowering plants, which is essential for plant survival and crop production. Most woody fruit trees such as apples and pears bloom in spring, but loquat blooms in autumn and winter. Gibberellin (GA) plays a key role in the regulation of plant flower formation. In this study, we sprayed loquat plants with exogenous GA(3), which resulted in vigorous vegetative growth rather than floral bud formation. We then performed a comprehensive RNA-seq analysis on GA(3)-treated and control-treated leaves and buds over three time periods to observe the effects of exogenous GA(3) application on floral initiation and development. The results showed that 111 differentially expressed genes (DEGs) and 563 DEGs were down-regulated, and 151 DEGs and 506 DEGs were up-regulated in buds and leaves, respectively, upon treatment with GA(3). Among those that are homologs of the DELLA-mediated GA signal pathway genes, some may be involved in the positive regulation of flower development, including EjWRKY75, EjFT, EjSOC1, EjAGL24, EjSPL, EjLFY, EjFUL, and EjAP1; while some may be involved in the negative regulation of flower development, including EjDELLA, EjMYC3, EjWRKY12, and EjWRKY13. Finally, by analyzing the co-expression of DEGs and key floral genes EjSOC1s, EjLFYs, EjFULs, EjAP1s, 330 candidate genes that may be involved in the regulation of loquat flowering were screened. These genes belong to 74 gene families, including Cyclin_C, Histone, Kinesin, Lipase_GDSL, MYB, P450, Pkinase, Tubulin, and ZF-HD_dimer gene families. These findings provide new insights into the regulation mechanism of loquat flowering.

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