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Updated: Mar 9, 2026

Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
Published on: December 23, 2017
Multiple roles of nitric oxide in root development and nitrogen uptake
Huwei Sun1,2, Jinyuan Tao1, Quanzhi Zhao2
1a State Key Laboratory of Crop Genetics and Germplasm Enhancement and Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of The Yangtze River , Ministry of Agriculture, Nanjing Agricultural University , Nanjing , China.
Nitric oxide (NO) regulates plant root growth and nitrogen metabolism. NO generated by nitrate reductase (NR) is key for improving nitrogen uptake in rice, aiding adaptation to changing nitrate levels.
Area of Science:
- Plant Physiology
- Molecular Biology
- Biochemistry
Background:
- Nitric oxide (NO) acts as a crucial signaling molecule in plant development.
- Nutrient fluctuations influence NO generation pathways, including nitrate reductase (NR) and NO synthase (NOS).
Purpose of the Study:
- To summarize recent findings on NO generation and its regulatory roles in plant root growth and nitrogen (N) metabolism.
- To explore the impact of NO concentration and experimental conditions on root development.
- To elucidate NO's role in N assimilation and uptake.
Main Methods:
- Literature review of studies on NO generation pathways (NR, NOS).
- Analysis of NO's regulatory effects on plant root growth and N metabolism.
- Investigation of NO's interaction with NR activity at the posttranslational level.
Main Results:
- NO generation is influenced by nutrient availability via NR and/or NOS pathways.
- Root development is sensitive to NO concentrations, with effects varying based on conditions.
- NO directly regulates NR activity, significantly impacting N assimilation.
- NO influences N distribution and uptake across various plant species.
Conclusions:
- NR-generated NO is vital for enhancing N uptake capacity in rice by promoting root growth.
- NO plays a significant role in plant N metabolism and root development.
- Understanding NO's function offers strategies for improving crop adaptation to fluctuating nutrient supplies.
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