Molecular mechanism of MdWUS2-MdTCP12 interaction in mediating cytokinin signaling to control axillary bud outgrowth

© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 72(2021), 13 vom: 22. Juni, Seite 4822-4838
1. Verfasser: Li, Guofang (VerfasserIn)
Weitere Verfasser: Tan, Ming, Ma, Juanjuan, Cheng, Fang, Li, Ke, Liu, Xiaojie, Zhao, Caiping, Zhang, Dong, Xing, Libo, Ren, Xiaolin, Han, Mingyu, An, Na
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Malus domestica Apple MdTCP12 MdWUS2 axillary bud outgrowth cytokinin shoot branching transcription mehr... Arabidopsis Proteins BRC1 protein, Arabidopsis Cytokinins Homeodomain Proteins Plant Proteins Transcription Factors
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520 |a Shoot branching is an important factor that influences the architecture of apple trees and cytokinin is known to promote axillary bud outgrowth. The cultivar 'Fuji', which is grown on ~75% of the apple-producing area in China, exhibits poor natural branching. The TEOSINTE BRANCHED1/CYCLOIDEA/PCF (TCP) family genes BRANCHED1/2 (BRC1/2) are involved in integrating diverse factors that function locally to inhibit shoot branching; however, the molecular mechanism underlying the cytokinin-mediated promotion of branching that involves the repression of BRC1/2 remains unclear. In this study, we found that apple WUSCHEL2 (MdWUS2), which interacts with the co-repressor TOPLESS-RELATED9 (MdTPR9), is activated by cytokinin and regulates branching by inhibiting the activity of MdTCP12 (a BRC2 homolog). Overexpressing MdWUS2 in Arabidopsis or Nicotiana benthamiana resulted in enhanced branching. Overexpression of MdTCP12 inhibited axillary bud outgrowth in Arabidopsis, indicating that it contributes to the regulation of branching. In addition, we found that MdWUS2 interacted with MdTCP12 in vivo and in vitro and suppressed the ability of MdTCP12 to activate the transcription of its target gene, HOMEOBOX PROTEIN 53b (MdHB53b). Our results therefore suggest that MdWUS2 is involved in the cytokinin-mediated inhibition of MdTCP12 that controls bud outgrowth, and hence provide new insights into the regulation of shoot branching by cytokinin 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Malus domestica 
650 4 |a Apple 
650 4 |a MdTCP12 
650 4 |a MdWUS2 
650 4 |a axillary bud outgrowth 
650 4 |a cytokinin 
650 4 |a shoot branching 
650 4 |a transcription 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a BRC1 protein, Arabidopsis  |2 NLM 
650 7 |a Cytokinins  |2 NLM 
650 7 |a Homeodomain Proteins  |2 NLM 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a Transcription Factors  |2 NLM 
700 1 |a Tan, Ming  |e verfasserin  |4 aut 
700 1 |a Ma, Juanjuan  |e verfasserin  |4 aut 
700 1 |a Cheng, Fang  |e verfasserin  |4 aut 
700 1 |a Li, Ke  |e verfasserin  |4 aut 
700 1 |a Liu, Xiaojie  |e verfasserin  |4 aut 
700 1 |a Zhao, Caiping  |e verfasserin  |4 aut 
700 1 |a Zhang, Dong  |e verfasserin  |4 aut 
700 1 |a Xing, Libo  |e verfasserin  |4 aut 
700 1 |a Ren, Xiaolin  |e verfasserin  |4 aut 
700 1 |a Han, Mingyu  |e verfasserin  |4 aut 
700 1 |a An, Na  |e verfasserin  |4 aut 
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773 1 8 |g volume:72  |g year:2021  |g number:13  |g day:22  |g month:06  |g pages:4822-4838 
856 4 0 |u http://dx.doi.org/10.1093/jxb/erab163  |3 Volltext 
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