Transcriptome analysis reveals that regulation network of the genes related to unique double flowers in tropical viviparous water lily
文献类型： 外文期刊
作者： Su, Qun 1 ; Tian, Min 3 ; Wang, Hongyan 1 ; Huang, Zhanwen 1 ; Awais, Muhammad 2 ; Xu, Xiaoqing 2 ; Wang, Lingyun 4 ; Lai, Zhongxiong 2 ; Bu, Zhaoyang 1 ;
作者机构： 1.Guangxi Acad Agr Sci, Flower Res Inst, Nanning 530007, Peoples R China
2.Fujian Agr & Forestry Univ, Inst Hort Biotechnol, Fuzhou 350002, Peoples R China
3.Yunnan Acad Agr Sci, Floriculture Res Inst, Natl Engn Res Ctr Ornamental Hort, Key Lab Flower Breeding Yunnan Prov, Kunming 650200, Peoples R China
4.Zhejiang Inst Agr Machinery, Jinhua Acad Agr Sci, Lab Characterist Aquat Vegetable Breeding & Cultiv, Jinhua 321000, Zhejiang, Peoples R China
关键词： Tropical viviparous water lily; Double flower; Stamen petaloid; ABCE gene model; MADS-box gene family
期刊名称：SCIENTIFIC REPORTS （ 影响因子：3.9； 五年影响因子：4.3 ）
ISSN： 2045-2322
年卷期： 2025 年 15 卷 1 期
页码：
收录情况： SCI
摘要： Among tropical viviparous water lilies (Nymphaea L.), double-petaled cultivars are exceptionally rare, and the molecular mechanisms underlying their floral organ development remain largely unexplored. In this study, we identified Nymphaea 'Candy Rain' as the sole known tropical water lily cultivar exhibiting a double-petaled phenotype, characterized by complete petaloid conversion of innermost stamens. To elucidate the genetic basis of this unique floral morphology, we performed comparative transcriptome analysis of three distinct petal types in N. 'Candy Rain'. Our investigation further extended to comprehensive identification and characterization of MADS-box gene family members in the reference genome of the tropical viviparous water lily Nymphaea 'Paul Stetson'. Genome-wide analysis revealed 65 NcMADS-box genes unevenly distributed across 25 chromosomes. Phylogenetic and expression analyses implicated several MADS-box gene clades (particularly AGL6, AP2, and AG) in the development of the double-petaled phenotype. Additionally, our data suggest potential involvement of other transcription factor families including WOX, NAC, TCP, MYB, and bHLH in this specialized floral morphogenesis. Notably, we identified multiple phytohormone-related genes (such as IAA16, YUC6, and TCH4) that may participate in the formation of double-petaled flowers, indicating complex hormonal regulation of this trait in tropical viviparous water lilies.
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