SaHMA3 Functions in Cadmium Hyperaccumulation and Tolerance of Sedum alfrediiFebruary 24, 2016
Understanding the mechanism of how hyperaccumulator plants accumulate and tolerate extremely toxic metals is vital for developing strategies for phytoremediation using engineered plants or natural hyperaccumulators.
Sedum alfredii Hance, a metal hyperaccumulator from the Crassulaceae family, is an ideal candidate for gaining understanding of the hyperaccumulation mechanisms as well as its potential applications. Zhejiang University's Jie Zhang led researchers to characterize a P1B-type ATPase gene (SaHMA3) from S. alfredii Hance.
SaHMA3 alleles from a hyperaccumulating ecotype (HE) and non-hyperaccumulating ecotype (NHE) were analyzed. The SaHMA3h allele from the HE plant was found to be a Cadmium transporter while SaHMA3n from NHE plants was a transporter of both Zinc and Cadmium.
The SaHMA3 gene was found to be expressed significantly higher in HE plants than in NHE plants. Furthermore, the expression level of SaHMA3 in the shoots of HE plants was considerably higher than in the roots. Overexpression of SaHMA3h in tobacco plants significantly enhanced its Cadmium tolerance and accumulation.
These results suggest that SaHMA3 plays critical roles in Cd hyperaccumulation and hypertolerance in S. alfredii Hance.
For more information, read the article on Planta.
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
- Plant Scientists: GM Technology to Help Meet Food Supply Demands
- NEPAD's ABNE Organizes African Study Tour to India
- New Device may Speed Up DNA Insertion into Bacteria
- Transgenic Sweet Corn Found Not More Susceptible to Goss's Wilt Disease
- New Genetic Advancements in Wheat Aimed Towards Enhancing Yield
- Biotechnologist Mohapatra to Lead Indian Council of Agriculture Research
- Plant Parts 'Talk' to One Another for Metabolism and Growth
- Immunity Gene Fusions Discovered in Plants
- Effect of Long-Term Cropping of Transgenic Soybean on Soil Microbiome
- SaHMA3 Functions in Cadmium Hyperaccumulation and Tolerance of Sedum alfredii
- Brassica ERD4 Gene Enhances Growth, Salt and Drought Tolerance in Arabidopsis
Beyond Crop Biotech
- Genetic Code of Pigs Altered to Tackle Deadly Virus
From the BICs
- Kenya's National Biosafety Boards Assessed Its Biotech Capacity through a Study Tour
- IRBC07 – ICBB05 (Back-to-Back International Conferences)
- 5th International Conference and Exhibition on Metabolomics
- 3rd Plant Genomics Congress: Asia
Subscribe to CBU: