The Role of EjSPL3, EjSPL4, EjSPL5, and EjSPL9 in Regulating Flowering in Loquat (Eriobotrya japonica Lindl.)
文献类型： 外文期刊
作者： Jiang, Yuanyuan 1 ; Peng, Jiangrong 1 ; Wang, Man 1 ; Su, Wenbing 1 ; Gan, Xiaoqing 1 ; Jing, Yi 2 ; Yang, Xianghui 1 ; L 1 ;
作者机构： 1.South China Agr Univ, State Key Lab Conservat & Utilizat Subtrop Agrobi, Coll Hort, Wushan Rd 483, Guangzhou 510642, Guangdong, Peoples R China
2.BGI Shenzhen, BGI Genom, Shenzhen 518083, Guangdong, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Beijing Acad Forestry & Pomol Sci, Beijing 100093, Peoples R China
关键词： loquat; SPL transcription factor; flowering time; aging pathway
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）
ISSN：
年卷期： 2020 年 21 卷 1 期
页码：
收录情况： SCI
摘要： The age pathway is important for regulating flower bud initiation in flowering plants. The major regulators in this pathway are miR156 and SPL transcription factors. To date, SPL genes have been identified in many species of plants. Loquat, as a woody fruit tree of Rosaceae, is unique in flowering time as it blooms in winter. However, the study of its SPL homologous genes on the regulation mechanism of flowering time is still limited. In this study, four SPL homologs-EjSPL3, EjSPL4, EjSPL5, and EjSPL9-are cloned from loquat, and phylogenetic analysis showed that they share a high sequence similarity with the homologues from other plants, including a highly conserved SQUAMOSA promoter binding protein (SBP)-box domain. EjSPL3, EjSPL4, EjSPL5 are localized in the cytoplasm and nucleus, and EjSPL9 is localized only in the nucleus. EjSPL4, EjSPL5, and EjSPL9 can significantly activate the promoters of EjSOC1-1, EjLFY-1, and EjAP1-1; overexpression of EjSPL3, EjSPL4, EjSPL5, and EjSPL9 in wild-type Arabidopsis thaliana can promote flowering obviously, and downstream flowering genes expression were upregulated. Our work indicated that the EjSPL3, EjSPL4, EjSPL5, and EjSPL9 transcription factors are speculated to likely participate in flower bud differentiation and other developmental processes in loquat. These findings are helpful to analyze the flowering regulation mechanism of loquat and provide reference for the study of the flowering mechanism of other woody fruit trees.
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