NSR1/MYR2 is a negative regulator of ASN1 expression and its possible involvement in regulation of nitrogen reutilization in Arabidopsis
Copyright © 2017 Elsevier B.V. All rights reserved.
| Veröffentlicht in: | Plant science : an international journal of experimental plant biology. - 1985. - 263(2017) vom: 01. Okt., Seite 219-225 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2017
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| Zugriff auf das übergeordnete Werk: | Plant science : an international journal of experimental plant biology |
| Schlagworte: | Journal Article Asparagine synthetase GARP-type transcription factor Nitrogen Reallocation Remobilization Arabidopsis Proteins Nsr1 protein, Arabidopsis Transcription Factors Aspartate-Ammonia Ligase mehr... |
| Zusammenfassung: | Copyright © 2017 Elsevier B.V. All rights reserved. Nitrogen (N) is a major macronutrient that is essential for plant growth. It is important for us to understand the key genes that are involved in the regulation of N utilization. In this study, we focused on a GARP-type transcription factor known as NSR1/MYR2, which has been reported to be induced under N-deficient conditions. Our results demonstrated that NSR1/MYR2 has a transcriptional repression activity and is specifically expressed in vascular tissues, especially in phloem throughout the plant under daily light-dark cycle regulation. The overexpression of NSR1/MYR2 delays nutrient starvation- and dark-triggered senescence in the mature leaves of excised whole aerial parts of Arabidopsis plants. Furthermore, the expression of asparagine synthetase 1 (ASN1), which plays an important role in N remobilization and reallocation, i.e. N reutilization, in Arabidopsis, is negatively regulated by NSR1/MYR2, since the expressions of NSR1/MYR2 and ASN1 were reciprocally regulated during the light-dark cycle and ASN1 expression was down-regulated in overexpressors of NSR1/MYR2 and up-regulated in T-DNA insertion mutants of NSR1/MYR2. Therefore, the present results suggest that NSR1/MYR2 plays a role in N reutilization as a negative regulator through controlling ASN1 expression |
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| Beschreibung: | Date Completed 09.01.2018 Date Revised 30.09.2020 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2259 |
| DOI: | 10.1016/j.plantsci.2017.07.013 |