Increasing Methionine in Potatoes
Author Information
Author(s): Dancs Gábor, Kondrák Mihály, Bánfalvi Zsófia
Primary Institution: Agricultural Biotechnology Center, Hungary
Hypothesis
Can co-expressing a gene for methionine synthesis with a methionine-rich protein improve the methionine content in potato tubers?
Conclusion
While the expression of CgSΔ90 increases methionine content in potato tubers, it also leads to significant growth and yield issues.
Supporting Evidence
- Transgenic potato lines showed a 2- to 6-fold increase in free methionine content.
- High expression of CgSΔ90 resulted in severe growth retardation and reduced tuber yield.
- The anthocyanin content in tubers was reduced by 4- to 5-fold due to CgSΔ90 expression.
Takeaway
Scientists tried to make potatoes healthier by adding more of an important nutrient called methionine, but it made the plants grow poorly.
Methodology
Potato plants were genetically modified to express CgSΔ90 and the 15-kD β-zein protein, and their amino acid content and phenotypes were analyzed.
Limitations
The transgenic lines exhibited severe growth retardation and reduced tuber yield.
Statistical Information
P-Value
0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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