HBI1-TCP20 interaction positively regulates the CEPs-mediated systemic nitrate acquisition
| Autor: | Shujuan Zhang, Ming-Yi Bai, Fengning Xiang, Min Fan, Cheng-Bin Xiang, Chao Han, Xiaoqian Chu, Mingzhe Li, Yong Wang, Genying Li, Jia-Gang Wang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Plant growth Arabidopsis Molecular evidence Plant Science medicine.disease_cause 01 natural sciences Biochemistry General Biochemistry Genetics and Molecular Biology 03 medical and health sciences chemistry.chemical_compound Nitrate Gene Expression Regulation Plant medicine Transcription factor Nitrate transporters Mutation Nitrates Arabidopsis Proteins Promoter Cell biology 030104 developmental biology chemistry Signal transduction 010606 plant biology & botany Signal Transduction |
| Zdroj: | Journal of integrative plant biologyREFERENCES. 63(5) |
| ISSN: | 1744-7909 |
| Popis: | Nitrate is the main source of nitrogen for plants but often distributed heterogeneously in soil. Plants have evolved sophisticated strategies to achieve adequate nitrate by modulating the root system architecture. The nitrate acquisition system is triggered by the short mobile peptides C-TERMINALLY ENCODED PEPTIDES (CEPs) that are synthesized on the nitrate-starved roots, but induce the expression of nitrate transporters on the other nitrate-rich roots through an unclear signal transduction pathway. Here, we demonstrate that the transcription factors HBI1 and TCP20 play important roles in plant growth and development in response to fluctuating nitrate supply. HBI1 physically interacts with TCP20, and this interaction was enhanced by the nitrate starvation. HBI1 and TCP20 directly bind to the promoters of CEPs and cooperatively induce their expression. Mutation in HBIs and/or TCP20 resulted in impaired systemic nitrate acquisition response. Our solid genetic and molecular evidence strongly indicate that the HBI1-TCP20 module positively regulates the CEPs-mediated systemic nitrate acquisition. |
| Databáze: | OpenAIRE |
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