OsERF2 controls rice root growth and hormone responses through tuning expression of key genes involved in hormone signaling and sucrose metabolism

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• 作者：Guiqing Xiao ; Hua Qin ; Jiahao Zhou ; Ruidang Quan ; Xiangyang Lu…
• 关键词：OsERF2 ; Rice ; Root growth ; ABA ; Ethylene ; Sugar
• 刊名：Plant Molecular Biology
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：90
• 期：3
• 页码：293-302
• 全文大小：2,938 KB
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• 作者单位：Guiqing Xiao (1) (2)
  Hua Qin (2)
  Jiahao Zhou (2)
  Ruidang Quan (2)
  Xiangyang Lu (1)
  Rongfeng Huang (2)
  Haiwen Zhang (2)
  
  1. College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, People’s Republic of China
  2. Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, People’s Republic of China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  Biochemistry
  Plant Pathology
  
• 出版者：Springer Netherlands
• ISSN：1573-5028

文摘

Root determines plant distribution, development progresses, stress response, as well as crop qualities and yields, which is under the tight control of genetic programs and environmental stimuli. Ethylene responsive factor proteins (ERFs) play important roles in plant growth and development. Here, the regulatory function of OsERF2 involved in root growth was investigated using the gain-function mutant of OsERF2 (nsf2857) and the artificial microRNA-mediated silenced lines of OsERF2 (Ami-OsERF2). nsf2857 showed short primary roots compared with the wild type (WT), while the primary roots of Ami-OsERF2 lines were longer than those of WT. Consistent with this phenotype, several auxin/cytokinin responsive genes involved in root growth were downregulated in nsf2857, but upregulated in Ami-OsERF2. Then, we found that nsf2857 seedlings exhibited decreased ABA accumulation and sensitivity to ABA and reduced ethylene-mediated root inhibition, while those were the opposite in Ami-ERF2 plants. Moreover, several key genes involved in ABA synthesis were downregulated in nsf2857, but unregulated in Ami-ERF2 lines. In addition, OsERF2 affected the accumulation of sucrose and UDPG by mediating expression of key genes involved in sucrose metabolism. These results indicate that OsERF2 is required for the control of root architecture and ABA- and ethylene-response by tuning expression of series genes involved in sugar metabolism and hormone signaling pathways. Keywords OsERF2 Rice Root growth ABA Ethylene Sugar