Transcriptional Cascade in the Regulation of Flowering in the Bamboo Orchid Arundina graminifolia
文献类型： 外文期刊
作者： Ahmad, Sagheer 1 ; Lu, Chuqiao 1 ; Wu, Jieqiu 1 ; Wei, Yonglu 1 ; Gao, Jie 1 ; Jin, Jianpeng 1 ; Zheng, Chuanyuan 1 ; Zhu 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Environm Hort Res Inst, Guangdong Key Lab Ornamental Plant Germplasm Inno, Guangzhou 510640, Peoples R China
关键词： Arundina graminifolia; flowering; transcriptome; transcription factor
期刊名称：BIOMOLECULES （ 影响因子：4.879； 五年影响因子：5.362 ）
ISSN：
年卷期： 2021 年 11 卷 6 期
页码：
收录情况： SCI
摘要： Flowering in orchids is the most important horticultural trait regulated by multiple mechanisms. Arundina graminifolia flowers throughout the year unlike other orchids with a narrow flowering span. However, little is known of the genetic regulation of this peculiar flowering pattern. This study identifies a number of transcription factor (TF) families in five stages of flower development and four tissue types through RNA-seq transcriptome. About 700 DEGs were annotated to the transcription factor category and classified into 35 TF families, which were involved in multiple signaling pathways. The most abundant TF family was bHLH, followed by MYB and WRKY. Some important members of the bHLH, WRKY, MYB, TCP, and MADS-box families were found to regulate the flowering genes at transcriptional levels. Particularly, the TFs WRKY34 and ERF12 possibly respond to vernalization and photoperiod signaling, MYB108, RR9, VP1, and bHLH49 regulate hormonal balance, and CCA1 may control the circadian pathway. MADS-box TFs including MADS6, 14, 16, AGL5, and SEP may be important regulators of flowering in A. graminifolia. Therefore, this study provides a theoretical basis for understanding the molecular mechanism of flowering in A. graminifolia.
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