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Transcriptomic and physiological analysis provide new insight into seed shattering mechanism in Pennisetum alopecuroides 'Liqiu'

文献类型： 外文期刊

作者： Xu, Yue 1 ; Liu, Lingyun 1 ; Jia, Ming 1 ; Teng, Ke 1 ; Mu, Na 1 ; Guo, Yidi 1 ; Liu, Muye 1 ; Wu, Juying 1 ; Teng, Wenjun 1 ; Huang, Linkai 2 ; Fan, Xifeng 1 ; Yue, Yuesen 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Grassland Flower & Ecol, Beijing 100097, Peoples R China

2.Sichuan Agr Univ, Coll Grassland Sci & Technol, Chengdu 610000, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）

ISSN： 0040-5752

年卷期： 2024 年 137 卷 7 期

页码：

收录情况： SCI

摘要： Key message Through the histological, physiological, and transcriptome-level identification of the abscission zone of Pennisetum alopecuroides 'Liqiu', we explored the structure and the genes related to seed shattering, ultimately revealing the regulatory network of seed shattering in P. alopecuroides. Pennisetum alopecuroides is one of the most representative ornamental grass species of Pennisetum genus. It has unique inflorescence, elegant appearance, and strong stress tolerance. However, the shattering of seeds not only reduces the ornamental effect, but also hinders the seed production. In order to understand the potential mechanisms of seed shattering in P. alopecuroides, we conducted morphological, histological, physiological, and transcriptomic analyses on P. alopecuroides cv. 'Liqiu'. According to histological findings, the seed shattering of 'Liqiu' was determined by the abscission zone at the base of the pedicel. Correlation analysis showed that seed shattering was significantly correlated with cellulase, lignin, auxin, gibberellin, cytokinin and jasmonic acid. Through a combination of histological and physiological analyses, we observed the accumulation of cellulase and lignin during 'Liqiu' seed abscission. We used PacBio full-length transcriptome sequencing (SMRT) combined with next-generation sequencing (NGS) transcriptome technology to improve the transcriptome data of 'Liqiu'. Transcriptomics further identified many differential genes involved in cellulase, lignin and plant hormone-related pathways. This study will provide new insights into the research on the shattering mechanism of P. alopecuroides.

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