Indeterminate domain 10 regulates ammonium-mediated gene expression in rice roots
Article first published online: 20 DEC 2012
© 2012 The Authors. New Phytologist © 2012 New Phytologist Trust
Volume 197, Issue 3, pages 791–804, February 2013
How to Cite
Xuan, Y. H., Priatama, R. A., Huang, J., Je, B. I., Liu, J. M., Park, S. J., Piao, H. L., Son, D. Y., Lee, J. J., Park, S. H., Jung, K. H., Kim, T. H. and Han, C.-d. (2013), Indeterminate domain 10 regulates ammonium-mediated gene expression in rice roots. New Phytologist, 197: 791–804. doi: 10.1111/nph.12075
- Issue published online: 7 JAN 2013
- Article first published online: 20 DEC 2012
- Manuscript Accepted: 30 OCT 2012
- Manuscript Received: 9 JUL 2012
- Next-Generation BioGreen 21 Program. Grant Numbers: PJ008215, PJ008168
- Rural Development Administration
- BK21 program
- indeterminate domain (IDD) gene;
- root growth;
- transcription factor
- Indeterminate domain (IDD) genes are a family of plant transcriptional regulators that function in the control of development and metabolism during growth. Here, the function of Oryza sativa indeterminate domain 10 (OsIDD10) has been explored in rice plants. Compared with wild-type roots, idd10 mutant roots are hypersensitive to exogenous ammonium. This work aims to define the action of IDD10 on gene expression involved in ammonium uptake and nitrogen (N) metabolism.
- The ammonium induction of key ammonium uptake and assimilation genes was examined in the roots of idd10 mutants and IDD10 overexpressors. Molecular studies and transcriptome analysis were performed to identify target genes and IDD10 binding cis-elements.
- IDD10 activates the transcription of AMT1;2 and GDH2 by binding to a cis-element motif present in the promoter region of AMT1;2 and in the fifth intron of GDH2. IDD10 contributes significantly to the induction of several genes involved in N-linked metabolic and cellular responses, including genes encoding glutamine synthetase 2, nitrite reductases and trehalose-6-phosphate synthase. Furthermore, the possibility that IDD10 might influence the N-mediated feedback regulation of target genes was examined.
- This study demonstrates that IDD10 is involved in regulatory circuits that determine N-mediated gene expression in plant roots.