数字农科院2.0

Using Transcriptome Analysis To Identify G.enes Involved In Switchgrass F lower Reversion

文献类型： 外文期刊

作者： Li Mao;Zhang Chao;Wang Yongfeng;Zhang Chao;Liu Shudong;Liu Shudong;Sun Fengli;Xi Yajun;Zheng Aiquan;Li Mao;Zheng Aiquan;Xu Kaijie;Xi Yajun;Sun Fengli;Wang Yongfeng

作者机构：

关键词： switchgrass; floral reversion; cytokinin; flower maintenance; transcriptome

期刊名称： FRONTIERS IN PLANT SCIENCE

ISSN： 1664-462X

年卷期： 2018 年 9 卷

页码：

摘要： Floral reversion is a process in which differentiated floral organs revert back to vegetative organs. Although this phenomenon has been described for decades, the underlying molecular mechanisms remain unclear. In this study, we found that immature switchgrass (Panicum virgatum) inflorescences can revert to neonatal shoots when incubated on a basal medium with benzylaminopurine. We used anatomical and histological methods to verify that these shoots were formed from floret primordia through flower reversion. To further explore the gene regulation of floral reversion in switchgrass, the transcriptome of reversed, unreversed, and uncultured immature inflorescences were analyzed and 517 genes were identified as participating in flower reversion. Annotation using non-redundant databases revealed that these genes are involved in plant hormone biosynthesis and signal transduction, starch and sucrose metabolism, DNA replication and modification, and other processes crucial for switchgrass flower reversion. When four of the genes were overexpressed in Arabidopsis thaliana, vegetative growth was facilitated and reproductive growth was inhibited in transgenic plants. This study provides a basic understanding of genes regulating the floral transition in switchgrass and will promote the research of floral reversion and flower maintenance.

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