Genetic variations in ARE1 mediate grain yield by modulating nitrogen utilization in rice
Qing Wang1,2, Jinqiang Nian1, Xianzhi Xie3
1State Key Laboratory of Plant Genomics and National Plant Gene Research Center, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 100101, Beijing, China.
Nature Communications
|February 23, 2018
Summary
Researchers identified the ARE1 gene in rice, which, when mutated, delays senescence and boosts grain yield by 10-20%. This discovery enhances nitrogen utilization efficiency (NUE) in crops, offering a promising target for developing higher-yielding varieties.
Area of Science:
- Agricultural Science
- Plant Biology
- Genetics
Background:
- Nitrogen is crucial for crop productivity, but improving nitrogen utilization efficiency (NUE) remains a significant challenge in agriculture.
- Enhancing NUE is vital for sustainable agriculture and reducing environmental impact.
Purpose of the Study:
- To characterize the ARE1 gene as a potential target for improving NUE in rice.
- To investigate the role of ARE1 in nitrogen assimilation and plant senescence.
Main Methods:
- Genetic characterization of the are1 mutant in rice.
- Analysis of ARE1 gene function and localization.
- Genomic analysis of ARE1 promoter variations in a large panel of rice accessions.
Main Results:
- Loss-of-function mutations in ARE1 lead to delayed senescence and a 10-20% increase in grain yield.
- ARE1 is a conserved, chloroplast-localized protein.
- Specific ARE1 promoter insertions found in 18% of indica and 48% of aus rice accessions correlate with reduced ARE1 expression and increased yield under nitrogen limitation.
Conclusions:
- ARE1 is a key mediator of NUE in rice.
- ARE1 represents a promising genetic target for breeding high-yield rice cultivars, especially under nitrogen-limiting conditions.
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