Auxin-mediated Aux/IAA-ARF-HB signaling cascade regulates secondary xylem development in Populus
文献类型：期刊论文
| 作者 | Xu, Changzheng; Shen, Yun; He, Fu; Fu, Xiaokang; Yu, Hong; Lu, Wanxiang; Li, Yongli; Li, Chaofeng; Fan, Di; Wang, Hua Cassan |
| 刊名 | NEW PHYTOLOGIST
 |
| 出版日期 | 2019 |
| 卷号 | 222期号:2 |
| 关键词 | ARF5 Aux/IAA9 auxin HD-ZIP III transcription factors Populus xylem development |
| 英文摘要 | Wood development is strictly regulated by various phytohormones and auxin plays a central regulatory role in this process. However, how the auxin signaling is transducted in developing secondary xylem during wood formation in tree species remains unclear. Here, we identified an Aux/INDOLE-3-ACETIC ACID 9 (IAA9)-AUXIN RESPONSE FACTOR 5 (ARF5) module in Populus tomentosa as a key mediator of auxin signaling to control early developing xylem development. PtoIAA9, a canonical Aux/IAA gene, is predominantly expressed in vascular cambium and developing secondary xylem and induced by exogenous auxin. Overexpression of PtoIAA9m encoding a stabilized IAA9 protein significantly represses secondary xylem development in transgenic poplar. We further showed that PtoIAA9 interacts with PtoARF5 homologs via the C-terminal III/IV domains. The truncated PtoARF5.1 protein without the III/IV domains rescued defective phenotypes caused by PtoIAA9m. Expression analysis showed that the PtoIAA9-PtoARF5 module regulated the expression of genes associated with secondary vascular development in PtoIAA9m- and PtoARF5.1-overexpressing plants. Furthermore, PtoARF5.1 could bind to the promoters of two Class III homeodomain-leucine zipper (HD-ZIP III) genes, PtoHB7 and PtoHB8, to modulate secondary xylem formation. Taken together, our results suggest that the Aux/IAA9-ARF5 module is required for auxin signaling to regulate wood formation via orchestrating the expression of HD-ZIP III transcription factors in poplar. |
| 源URL | [http://210.75.249.4/handle/363003/59822]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Xu, Changzheng,Shen, Yun,He, Fu,et al. Auxin-mediated Aux/IAA-ARF-HB signaling cascade regulates secondary xylem development in Populus[J]. NEW PHYTOLOGIST,2019,222(2). |
| APA | Xu, Changzheng.,Shen, Yun.,He, Fu.,Fu, Xiaokang.,Yu, Hong.,...&Luo, Keming.(2019).Auxin-mediated Aux/IAA-ARF-HB signaling cascade regulates secondary xylem development in Populus.NEW PHYTOLOGIST,222(2). |
| MLA | Xu, Changzheng,et al."Auxin-mediated Aux/IAA-ARF-HB signaling cascade regulates secondary xylem development in Populus".NEW PHYTOLOGIST 222.2(2019). |
入库方式： OAI收割
来源：西北高原生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。