Expression of HvYS1 in Rice Increases Iron Uptake and Seed Loading via Selective Iron TransportOctober 19, 2016
Several metal transporters in plants accommodate multiple cations, including some which are toxic to humans. Attempts at increasing iron and zinc content of rice endosperm by overexpressing metal transporters unintentionally led to accumulation of copper, manganese, and cadmium. Unlike other metal transporters, the barley Yellow Stripe 1 (HvYS1) is specific for iron.
The team of Raviraj Banakar of the Universitat de Lleida-Agrotecnio Center Lleida investigated the basis of this preference by expressing HvYS1 in rice under the control of the maize ubiquitin1 promoter. Plants expressing HvYS1 had slight increases in iron uptake, translocation, seed accumulation, and endosperm loading, but had no changes in the uptake of zinc, manganese or copper. The zinc and manganese levels in the endosperm did not differ between the wild-type and HvYS1 lines, but the latter had significantly lower copper levels. The transgenic lines also showed a significantly reduced cadmium uptake, translocation, and accumulation in the rice seeds.
These results suggest that HvYS1 promotes the preferential mobilization and loading of iron. The increased loading of iron displaces copper and cadmium in the rice seeds.
For more information, read the full article in Plant Biotechnology Journal.
The Crop Biotech Update is a weekly newsletter of ISAAA, a not-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
- UN Agencies Urge Transformation of Food Systems
- 2016 Borlaug CAST Communication Award Goes to Dr. Kevin Folta
- Egypt Holds Workshop on New Biotech Applications
- Researchers Reveal Biofortification Increases Availability and Longevity of Beta-Carotene in Sorghum
- WSU Researchers Speed up Nitrogen Fixation to Boost Soybean Productivity
- New Sequencing Technology to Help Breed Climate-Tolerant Wine Grapes
- Study Finds that Adoption of GM Crops Could Improve Health of Chinese Farmers
- Mindanao Farmers and Local Agri Officials Updated on Latest Biosafety Guidelines
- Expression of HvYS1 in Rice Increases Iron Uptake and Seed Loading via Selective Iron Transport
Plant Breeding Innovations
- Stacking Sequence-Specific Nuclease-Induced Mutations Using TALENs to Improve Soybean Oil
Beyond Crop Biotech
- Complete Zika Virus Genome Sequence Isolated from Semen
From the BICs
- Scientists in Egypt Improves Oil Plants
- Women's Groups Enlightened on Modern Biotech in the Philippines
- Technical Meeting with Stakeholders on Supplementary Guidance for Allergenicity Assessment of GM Plants
- New ISAAA Infographic: Where are Biotech Crops Grown in the World?
Read the latest:
- Crop Biotech Update (August 10, 2022)
- Genome Editing Supplement (August 10, 2022)
- Gene Drive Supplement (July 27, 2022)
Subscribe to CBU: