Study Reveals the Role of Malate Transporters in Rice Grain YieldAugust 8, 2018
Panicle size is a critical factor in grain yield in rice and other grain crops. During rice growth and development, spikelet abortion often occurs at either the top or the basal part of the panicle under unfavorable conditions, causing a reduction in grain yield. Yueqin Heng from the Chinese Academy of Agricultural Sciences studied a rice panicle abortion mutant, panicle apical abortion1-1 (paab1-1), to learn more about spikelet abortion.
The paab1-1 mutant exhibits degeneration of spikelets on the apical portion of panicles during late stage of panicle development. Analysis revealed that the apical spikelets in the paab1-1 mutant undergo programmed cell death. Further analysis revealed that paab1-1 possesses a mutation in the OsALMT7 gene, which encodes an aluminum-activated malate transporter in the plasma membrane, and is expressed in the vascular tissues of developing panicles.
The panicle of the paab1-1 mutant had less malate than wildtypes at the apical portions. Furthermore, injection of malate into the paab1-1 panicle could rescue the spikelet degeneration phenotype. CRISPR-Cas9 knockout of OsALMT7 in rice further confirmed the function of the gene, as the generated CRISPR mutants exhibited the same panicle abortion phenotype as the paab1-1 mutant.
These results suggest that OsALMT7-mediated transport of malate into the apical portion of panicle is required for normal panicle development, highlighting a key role of malate in maintaining the sink size and grain yield in rice.
For more information, read the article in The Plant Cell.
Biotech Updates is a weekly newsletter of ISAAA, a not-for-profit organization. It is distributed for free to over 22,000 subscribers worldwide to inform them about the key developments in biosciences, especially in 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
- The Need for GM Wheat
- New Multiple Gene Stacking Technique Could Develop Crops with Higher Yields and Better Traits
- Regulatory and Policy Officials of APEC Economies Briefed on Biotechnology and Plant Breeding Innovations
- Key Gene for Sugarcane Growth Has Been Identified
- Researches Report Protein that Controls Flowering thru Combined on and off Switches
- U.S. Dept of Interior Ends Ban on GE Crops and Neonicotinoid Pesticides in Refuge
- New Genome of Chinese Soybean Now Available
- Scientists Narrate Past, Present, and Future of the Bt Eggplant Project in Bangladesh
- European Commission Authorizes Five GM Crops
- Poland Releases Draft GE Labeling Legislation
- Rice OsRACK1A Gene Negatively Regulates Salt Tolerance
- TaWRKY2-Overexpression Enhances Drought Tolerance in Wheat
Beyond Crop Biotech
- SCI+POP, A New Social Media Project in Canada
- Study Shows Poplar Trees Can Be Genetically Engineered Not to Spread
- Researchers Edit Yield-Increasing Genes in Rice
- Regulator of Symbiotic Nodulation in Lotus Found
- Study Reveals the Role of Malate Transporters in Rice Grain Yield
- CRISPR Gene-Editing Technology, Better with Cas12a
Read the latest:
- Biotech Updates (November 22, 2023)
- Gene Editing Supplement (November 15, 2023)
- Gene Drive Supplement (February 22, 2023)
Subscribe to BU: