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The dynamic regulatory network of stamens and pistils in papaya

文献类型： 外文期刊

作者： Xiang, Tao 1 ; Zhu, Yating 1 ; Wang, Yang 1 ; Chen, Xi 2 ; Zhang, Zhibin 2 ; Lai, Juan 2 ; Zhou, Ping 3 ; Ming, Ray 2 ; Yue, Jingjing 2 ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Life Sci, Fuzhou 350002, Peoples R China

2.Fujian Agr & Forestry Univ, Key Lab Genet Breeding & Multiple Utilizat Crops, Fujian Prov Key Lab Haixia Appl Plant Syst Biol, Ctr Genom & Biotechnol,Minist Educ, Fuzhou 350002, Peoples R China

3.Fujian Acad Agr Sci, Fruit Res Inst, Fuzhou 350013, Peoples R China

关键词： Gene regulatory network; ABCDE module; Pistil and stamen development; Hormone signaling pathway; Evolution

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）

ISSN： 1471-2229

年卷期： 2025 年 25 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundPapaya exhibits three sex types: female (XX), male (XY), and hermaphrodite (XYh), making it an unusual trioecious model for studying sex determination. A critical aspect of papaya sex determination is the pistil abortion in male flowers. However, the regulatory networks that control the development of pistils and stamens in papaya remain incompletely understood.ResultsIn this study, we identified three organ-specific clusters involved in papaya pistils and stamens development. We found that pistil development is primarily characterized by the significant expression of auxin-related genes, while the pistil abortion genes in males is mainly associated with cytokinin, gibberellin, and auxin pathways. Additionally, we constructed expression regulatory networks for the development of female pistils, aborted pistils and stamens in male flowers, revealing key regulatory genes and signaling pathways involved in papaya organ development. Furthermore, we systematically identified 65 members of the MADS-box gene family and 10 ABCDE subfamily MADS-box genes in papaya. By constructing a phylogenetic tree of the ABCDE subfamily, we uncovered gene contraction and expansion in papaya, providing an improved understanding of the developmental mechanisms and evolutionary history of papaya floral organs.ConclusionsThese findings provide a robust framework for identifying candidate sex-determining genes and constructing the sex determination regulatory network in papaya, providing insights and genomic resources for papaya breeding.

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