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Transcriptome Analysis Reveals the Senescence Process Controlling the Flower Opening and Closure Rhythm in the Waterlilies (Nymphaea L.)

文献类型： 外文期刊

作者： Li, Zhaoji 1 ; Zhou, Weijuan 1 ; Wang, Peng 2 ; Chen, Yanfu 1 ; Huo, Shaojie 1 ; Wang, Jian 1 ; Tian, Daike 3 ; Niu, Jun; 1 ;

作者机构： 1.Hainan Univ, Coll Forestry, Key Lab Minist Educ Genet & Germplasm Innovat Tro, Key Lab Germplasm Resources Biol Trop Special Orn, Haikou, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou, Hainan, Peoples R China

3.Chinese Acad Sci, Shanghai Chenshan Plant Sci Res Ctr, Shanghai Key Lab Plant Funct Genom & Resources, Shanghai Chenshan Bot Garden, Shanghai, Peoples R China

关键词： flower opening and closure; flower senescence; gene regulation; cell signal transduction; cell metabolism; waterlily

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.754； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2021 年 12 卷

页码：

收录情况： SCI

摘要： Most waterlily flowers open at dawn and close after noon usually for three to four days, and thereafter wilt. The short lifespan of flowers restricts the development of the flower postharvest industry. The termination of flower movements is a key event during flower aging process. However, it is still unclear when the senescence process initiates and how it terminates the movement rhythm. In this study, we observed that the opening diameter of flowers was the smallest on the fourth (last) flowering day. Subsequent transcriptome profiles generated from petals at different flowering stages showed that the multiple signaling pathways were activated at the last closure stage (Time 3, T3) of the flowers, including Ca2+, reactive oxygen species and far red light signaling pathways, as well as auxin, ethylene and jasmonic acid signaling pathways. Moreover, In terms of cell metabolism regulation, the genes related to hydrolase (protease, phospholipase, nuclease) were upregulated at T3 stage, indicating that petals entered the senescence stage at that time; and the genes related to water transport and cell wall modification were also differentially regulated at T3 stage, which would affect the ability of cell expand and contract, and eventually lead to petal not open after the fourth day. Collectively, our data provided a new insight into the termination of flower opening in the waterlilies, and a global understanding of the senescence process of those opening-closure rhythm flowers.

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