文献类型： 外文期刊
作者： Yu, Qin 1 ; Cheng, Chenxia 1 ; Zhou, Xiaofeng 1 ; Li, Yonghong 3 ; Hu, Yingchun 4 ; Yang, Chun 1 ; Zhou, Yingying 1 ; Soliman, Tarek M. A. 5 ; Zhang, Hao 6 ; Wang, Qigang 6 ; Wang, Huichun 6 ; Jiang, Cai-Zhong 7 ; Gan, Su-Sheng 9 ; Gao, Junping 1 ; Ma, Nan 1 ;
作者机构： 1.China Agr Univ, Dept Ornamental Hort, Beijing Key Lab Dev & Qual Control Ornamental Crop, Beijing 100193, Peoples R China
2.Qingdao Agr Univ, Coll Hort, Qingdao 266109, Shandong, Peoples R China
3.Shenzhen Polytech, Sch Appl Chem & Biotechnol, Shenzhen 518055, Guangdong, Peoples R China
4.Peking Univ, Coll Life Sci, Core Facil, Beijing 100871, Peoples R China
5.New Valley Univ, Fac Agr, New Valley 72511, Egypt
6.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650205, Yunnan, Peoples R China
7.US Dept Agr, Agr Res Serv, Crop Pathol & Genet Res Unit, Davis, CA 95616 USA
8.Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA
9.Cornell Univ, Coll Agr & Life Sci, Sch Integrat Plant Sci, Plant Biol Sect, Ithaca, NY 14853 USA
关键词： auxin; cambium; ethylene; HD-ZIP I transcription factor; Rosa hybrida
期刊名称：NEW PHYTOLOGIST （ 影响因子：9.4； 五年影响因子：10.5 ）
ISSN： 0028-646X
年卷期： 2023 年 239 卷 3 期
页码：
收录情况： SCI
摘要： The vascular cambium is the main secondary meristem in plants that produces secondary phloem (outside) and xylem (inside) on opposing sides of the cambium. The phytohormone ethylene has been implicated in vascular cambium activity, but the regulatory network underlying ethylene-mediated cambial activity remains to be elucidated.Here, we found that PETAL MOVEMENT-RELATED PROTEIN1 (RhPMP1), an ethylene-inducible HOMEODOMAIN-LEUCINE ZIPPER I transcription factor in woody plant rose (Rosa hybrida), regulates local auxin biosynthesis and auxin transport to maintain cambial activity.Knockdown of RhPMP1 resulted in smaller midveins and reduced auxin content, while RhPMP1 overexpression resulted in larger midveins and increased auxin levels compared with the wild-type plants. Furthermore, we revealed that Indole-3-pyruvate monooxygenase YUCCA 10 (RhYUC10) and Auxin transporter-like protein 2 (RhAUX2), encoding an auxin biosynthetic enzyme and an auxin influx carrier, respectively, are direct downstream targets of RhPMP1.In summary, our results suggest that ethylene promotes an auxin maximum in the cambium adjacent to the xylem to maintain cambial activity.
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