Transcriptomic analyses reveal complex and interconnected sucrose signaling cascades in developing seeds of castor bean

文献类型： 外文期刊

第一作者： Wang, Bin

作者： Wang, Bin;Haque, Mohammad Enamul;Xu, Wei;Li, Fei;Liu, Aizhong;Wang, Bin;Haque, Mohammad Enamul;Zhang, Yang;Liu, Aizhong

作者机构：

关键词： Castor bean;Sucrose signaling;Non-green seeds;Seed development;Transcriptomic analysis

期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：3.549； 五年影响因子：4.164 ）

ISSN： 0176-1617

年卷期： 2018 年 221 卷

页码：

收录情况： SCI

摘要： Seeds are highly specific organs that strongly sink sucrose resources from leaf and stem tissues to trigger seed metabolism and development. In particular, for heterotrophic non-green seeds, the potential molecular mechanism underlying sucrose-driven seed development remains unanswered. Castor bean (Ricinus communis L.), a typical non-green seed, has been considered as a model plant for seed biology study in dicotyledonous plants due to its heterotrophic seeds with persistent endosperms. In the present study, the fast-developing castor bean seeds were treated with exogenous sucrose and mannitol for four hours. The global transcriptomic data were obtained by high-throughput RNA-seq technique, resulting in 468 differentially expressed genes (DGEs). Further analyses revealed that sucrose functioned as both metabolic substrates and signal molecules. Specifically, 73 DGEs involved in carbohydrate and nitrogen metabolism, 42 differentially expressed transcription factors, and 35 DGEs involved in diverse signaling pathways such as auxin, brassinosteroid, ethelyene, cytokinin, gibberellin, and calcium signals, were identified, suggesting that the sucrose signaling pathway might have complex and multi-connected cross-talks with other signals to regulate castor bean seed development. Taken together, this study provides novel data to improve understanding of the potential molecular mechanisms of sucrose in regulating non-green seed development and storage reservoir accumulation during seed development.

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