文献类型：期刊文献

英文题名：Brassinosteroid regulation of wood formation in poplar

作者：Du, Juan[1,2,3] Gerttula, Suzanne[3] Li, Zehua[2] Zhao, Shu-Tang[2] Li-Liu, Ying[2] Liu, Yu[1] Lu, Meng-Zhu[2,4] Groover, Andrew T.[3,5]

第一作者：Du, Juan

通信作者：Lu, MZ[1];Groover, AT[2];Lu, MZ[3];Groover, AT[4]

机构：[1]Zhejiang Univ, Coll Life Sci, 866 Yu Hang Tang Rd, Hangzhou 310058, Zhejiang, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[3]US Forest Serv, Pacific Southwest Res Stn, Davis, CA 95618 USA;[4]Zhejiang Agr & Forest Univ, Sch Forestry & Biotechnol, State Key Lab Subtrop Silviculture, Hangzhou 311300, Zhejiang, Peoples R China;[5]Univ Calif Davis, Dept Plant Biol, Davis, CA 95616 USA

年份：2020

卷号：225

期号：4

起止页码：1516-1530

外文期刊名：NEW PHYTOLOGIST

收录：;Scopus(收录号：2-s2.0-85068509623);WOS:【SCI-EXPANDED(收录号:WOS:000474105400001)】；

基金：This study was supported by the National Key Program on 2016YFD0600103; the Zhejiang University 111 Project (grant no. B14027); and 2015-67013-22891 from USDA AFRI to AG. We thank Vladimir Filkov for helpful discussions of gene expression data analysis.

语种：英文

外文关键词：brassinosteroids; forest tree; phytohormones; Populus; secondary growth; wood formation

摘要：Brassinosteroids have been implicated in the differentiation of vascular cell types in herbaceous plants, but their roles during secondary growth and wood formation are not well defined. Here we pharmacologically and genetically manipulated brassinosteroid levels in poplar trees and assayed the effects on secondary growth and wood formation, and on gene expression within stems. Elevated brassinosteroid levels resulted in increases in secondary growth and tension wood formation, while inhibition of brassinosteroid synthesis resulted in decreased growth and secondary vascular differentiation. Analysis of gene expression showed that brassinosteroid action is positively associated with genes involved in cell differentiation and cell-wall biosynthesis. The results presented here show that brassinosteroids play a foundational role in the regulation of secondary growth and wood formation, in part through the regulation of cell differentiation and secondary cell wall biosynthesis.