文献类型：期刊文献

英文题名：WUSCHEL-related homeobox gene PagWOX11/12a responds to drought stress by enhancing root elongation and biomass growth in poplar

作者：Wang, Liu-Qiang[1,2] Li, Zhen[1] Wen, Shuang-Shuang[1] Wang, Jin-Nan[1] Zhao, Shu-Tang[1] Lu, Meng-Zhu[1,2]

第一作者：王留强;Wang, Liu-Qiang

通信作者：Lu, MZ[1];Lu, MZ[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China

年份：2020

卷号：71

期号：4

起止页码：1503-1513

外文期刊名：JOURNAL OF EXPERIMENTAL BOTANY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000518530400026)】；

基金：This work was supported by the Special Fund for Forest Scientific Research in the Public Welfare (no. 201504101), Fundamental Research Funds for the Central Non-profit Research Institution of CAF (no. CAFYBB2018QB002), and the National Natural Science Foundation of China (no. 31600539).

语种：英文

外文关键词：Drought resistance; PagERF35; PagWOX11/12a; Populus albaxP; glandulosa; root elongation; root biomass

摘要：In plants, a large root system improves the uptake of water and nutrients, and is important for responding to drought stress. The poplar WUSCHEL-related homeobox (WOX) transcription factor promotes adventitious rooting, but its regulation of root growth in response to drought stress remains elusive. In this study, we found that PagWOX11/12a from hybrid poplar 84K (Populus albaxPopulus glandulosa) is expressed predominantly in the roots and is strongly induced by drought stress. Compared with non-transgenic 84K plants, transgenic poplar plants overexpressing PagWOX11/12a displayed increased root biomass and enhanced drought tolerance, while opposite phenotypes were observed for PagWOX11/12a dominant repression plants. PagWOX11/12a functions as a nuclear transcriptional activator with a transactivation domain at the C-terminus. In addition, PagERF35 was found to specifically bind to a dehydration-responsive element (DRE) within the PagWOX11/12a promoter and activate PagWOX11/12a gene expression. These results indicate that PagERF35 may activate PagWOX11/12a expression in response to drought stress by promoting root elongation and biomass, thereby increasing drought tolerance of poplar.