ES7 Functions in Nitrogen Metabolism and Chlorophyll Synthesis in RiceApril 19, 2017
Glutamate synthase (GOGAT) is a key enzyme for nitrogen metabolism and ammonium assimilation in plants. Recently, researchers from the China National Rice Research Institute identified and characterized an early senescence 7 (es7) rice mutant and aimed to characterize the function of the rice gene, ES7.
The leaves of the es7 mutant begin to senesce at the tillering stage, about 60 days after sowing, and become increasingly senescent as the plants develop at the heading stage. However, when es7 plants are grown under high CO2 conditions, the senescence phenotype and chlorophyll content are rescued. Analysis showed that senescence-associated genes were significantly upregulated in the es7 mutant.
Scientists then identified the ES7 gene, which encodes a ferredoxin-dependent glutamate synthase (Fd-GOGAT). ES7 is expressed constitutively, and its protein was localized in the chloroplast. Further analysis revealed that several genes related to nitrogen metabolism were differentially expressed while chlorophyll synthesis-associated genes were significantly downregulated in the mutant rice plant.
These results demonstrate that ES7 is involved in nitrogen metabolism and affects chlorophyll synthesis. It may also be associated with photorespiration, thus, affecting leaf senescence in rice.
For more on this study, read the article in Plant Science.
The Crop Biotech Update is a weekly newsletter of ISAAA, a non-for-profit organization. The CBU is distributed for free to over 23,000 subscribers worldwide to inform them about the key developments in biosciences, especially in agricultural biotechnology. Your support will help us in our mission to feed the world with knowledge. You can help by donating as little as $10.
See more articles:
News from Around the World
- Almost Two Billion People in the World Depend on Imported Food
- Herbicide Use Increased More for Non-GM Crops than Biotech Crops, Study
- Farms in Kenya Face Armyworms Attack
- Abscisic Acid Role in Plant Branching
- U.S. EPA Implements Temporary Exemption from the Requirement of a Tolerance for mCry51Aa2
- UC Davis Scientists Report that Plant Genes Have Volume Controls
- Lettuce Genome Assembly Published
- Twitter Survey Shows 71% of Votes Say GMOs Needed to Feed World Population
- Indonesian Farmers to Gain Access to Paddy Seeds Resistant to Hoppers and Bacterial Blights
- ES7 Functions in Nitrogen Metabolism and Chlorophyll Synthesis in Rice
- Traditional Breeding Alters Maize Composition More than Stacking Transgenic Events
Plant Breeding Innovations
- The Use of Viral Vectors for Plant Genome Editing
- Tobacco Enzymes Inactivated via Multiplex CRISPR-Cas9 Strategy
Beyond Crop Biotech
- Genetic Modification of Escherichia coli for Propionate Production
- International Food Conference on Global Food Security
Subscribe to CBU: