Affiliation:
1. State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
2. Crop Research Institute, Taizhou Academy of Agricultural Sciences, Linhai, Zhejiang 317000, China
Abstract
Abstract
Gibberellins (GAs) play important roles in the regulation of plant growth and development. The green revolution gene SD1 encoding gibberellin 20-oxidase 2 (GA20ox2) has been widely used in modern rice breeding. However, the molecular mechanism of how SD1/OsGA20ox2 expression is regulated remains unclear. Here, we report a Cys2/His2 zinc finger protein ZFP207 acting as a transcriptional repressor of OsGA20ox2. ZFP207 was mainly accumulated in young tissues and more specifically in culm nodes. ZFP207-overexpression (ZFP207OE) plants displayed semidwarfism phenotype and small grains by modulating cell length. RNA interference of ZFP207 caused increased plant height and grain length. The application of exogenous GA3 could rescue the semidwarf phenotype of ZFP207OE rice seedlings. Moreover, ZFP207 repressed the expression of OsGA20ox2 via binding to its promoter region. Taken together, ZFP207 acts as a transcriptional repressor of SD1/OsGA20ox2 and it may play a critical role in plant growth and development in rice through the fine-tuning of GA biosynthesis .
Funder
National Key Research and Development Program
Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Jiangsu Collaborative Innovation Center for Modern Crop Production
Cyrus Tang Seed Innovation Center
Nanjing Agricultural University
Publisher
Oxford University Press (OUP)
Subject
Cell Biology,Plant Science,Physiology,General Medicine
Cited by
13 articles.
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