| Gibberellin Promotes Shoot Branching in the Perennial Woody Plant Jatropha curcas | |
Ni, Jun; Gao, Congcong; Chen, Mao-Sheng; Pan, Bang-Zhen; Ye, Kaiqin; Xu, Zeng-Fu
| |
| 2015 | |
| Source Publication | PLANT AND CELL PHYSIOLOGY
 |
| ISSN | 0032-0781 |
| Volume | 56Issue:8Pages:1655-1666 |
| Abstract | Strigolactone (SL), auxin and cytokinin (CK) interact to regulate shoot branching. CK has long been considered to be the only key phytohormone to promote lateral bud outgrowth. Here we report that gibberellin also acts as a positive regulator in the control of shoot branching in the woody plant Jatropha curcas. We show that gibberellin and CK synergistically promote lateral bud outgrowth, and that both hormones influence the expression of putative branching regulators, J. curcas BRANCHED1 and BRANCHED2, which are key transcription factors maintaining bud dormancy. Moreover, treatment with paclobutrazol, an inhibitor of de novo gibberellin biosynthesis, significantly reduced the promotion of bud outgrowth by CK, suggesting that gibberellin is required for CK-mediated axillary bud outgrowth. In addition, SL, a plant hormone involved in the repression of shoot branching, acted antagonistically to both gibberellin and CK in the control of lateral bud outgrowth. Consistent with this, the expression of JcMAX2, a J. curcas homolog of Arabidopsis MORE AXILLARY GROWTH 2 encoding an F-box protein in the SL signaling pathway, was repressed by gibberellin and CK treatment. We also provide physiological evidence that gibberellin also induces shoot branching in many other trees, such as papaya, indicating that a more complicated regulatory network occurs in the control of shoot branching in some perennial woody plants. |
| Keyword | Apical Dominance Pisum-sativum Cytokinin Concentration Arabidopsis-thaliana Axillary Buds Indole-3-acetic-acid Levels Acts Downstream Auxin Strigolactone Pea |
| Subject Area | Plant Sciences ; Cell Biology |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/9245 |
| Collection | 能源植物分子育种研究组 |
| Corresponding Author | Xu, Zeng-Fu |
| Recommended Citation GB/T 7714 | Ni, Jun,Gao, Congcong,Chen, Mao-Sheng,et al. Gibberellin Promotes Shoot Branching in the Perennial Woody Plant Jatropha curcas[J]. PLANT AND CELL PHYSIOLOGY,2015,56(8):1655-1666. |
| APA | Ni, Jun,Gao, Congcong,Chen, Mao-Sheng,Pan, Bang-Zhen,Ye, Kaiqin,&Xu, Zeng-Fu.(2015).Gibberellin Promotes Shoot Branching in the Perennial Woody Plant Jatropha curcas.PLANT AND CELL PHYSIOLOGY,56(8),1655-1666. |
| MLA | Ni, Jun,et al."Gibberellin Promotes Shoot Branching in the Perennial Woody Plant Jatropha curcas".PLANT AND CELL PHYSIOLOGY 56.8(2015):1655-1666. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Gibberellin Promotes（2394KB） | 开放获取 | CC BY-NC-SA | View Download | |||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment