Hormone and transcriptomic analysis revealed that ABA and BR are key factors in the formation of inter-subgeneric hybridization barrier in water lily

文献类型： 外文期刊

第一作者： Zhou, Ping

作者： Zhou, Ping;Li, Jingwen;Jiang, Huiyan;Jin, Qijiang;Wang, Yanjie;Xu, Yingchun;Zhou, Ping;Li, Jingwen;Jiang, Huiyan;Jin, Qijiang;Wang, Yanjie;Xu, Yingchun;Yang, Zhijuan;Sun, Chunqing;Wang, Hongyan;Su, Qun

作者机构：

期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：6.4； 五年影响因子：5.9 ）

ISSN： 0031-9317

年卷期： 2024 年 176 卷 1 期

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收录情况： SCI

摘要： Understanding the process of signal communication between pollen and stigma is of significant importance for plant sexual reproduction. In the case of inter-subgeneric hybridization in water lily, a pre-fertilization hybridization barrier exists, the regulatory mechanism of which remains unclear. In this study, we conducted hormone and transcriptome analyses of unpollinated stigmas (Mock), self-pollinated stigmas (SP), cross-pollinated stigmas within the same subgenus (CP), and inter-subgenus cross-pollination stigmas (ISCP) in water lily to elucidate the formation mechanism of the inter-subgeneric hybridization barrier. Our results indicated that the lack of abscisic acid (ABA) and brassinolide (BR) in ISCP stigmas are key factors contributing to the formation of the inter-subgeneric hybridization barrier in water lily. Exogenous application of ABA and BR can help overcome the barrier between inter-subgeneric water lily crosses. Through transcriptome analysis, we identified nine candidate genes involved in regulating the inter-subgeneric hybridization barrier in water lily. In addition, we further demonstrated the importance of the NCED2-mediated ABA synthesis pathway in the pollination process through AS-ODN technology. Our study confirms that ABA and BR are critical for breaking the inter-subgeneric hybridization barrier. The identification of the nine candidate genes provides important clues for further research on the hybridization recognition mechanism in water lily.

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