Researchers from the Academia Sinica of Taiwan achieved an unprecedented milestone in plant biotechnology: they designed a synthetic biochemical circuit that operates in parallel with natural photosynthesis, allowing plants to fix up to 50% more carbon dioxide.
The study, published in the journal Science, marks the first time a plant organism executes two active carbon fixation pathways simultaneously.
Model plants with superior performance
The team led by Dr. James C. Liao, president of Academia Sinica and a leader in metabolic biotechnology, used the species Arabidopsis thaliana to validate the system. The results were surprising:
- Accelerated growth
- Increased biomass and lipid content
- Seed production tripled compared to non-modified specimens
The McG cycle: a synthetic pathway that complements photosynthesis
The innovation is based on the development of the malyl-CoA–glycerate (McG) cycle, an artificial metabolic pathway that reuses byproducts of photorespiration, normally considered inefficient.
This new cycle works alongside the Calvin cycle, redirecting carbon towards the synthesis of acetyl-CoA, a key precursor in the formation of plant oils and lipids.
“They are magical plants,” the researchers celebrated, for their unprecedented ability to execute two carbon fixation processes in parallel.
Agronomic implications: more biomass with fewer resources
Although the experiment was conducted in a laboratory, its applications could be transformative for agricultural regions affected by:
- Prolonged droughts
- Water stress
- Soil degradation
In high-value crops such as table grapes, cherries, blueberries, apples, and stone fruits, this physiological improvement could:
- Increase yields per hectare
- Improve the energy content of the fruits
- Extend flowering and filling windows
Water-sensitive crops: olive and avocado in focus
Species like the olive and the avocado, highly dependent on water availability, could benefit from greater photosynthetic efficiency per unit of water, allowing:
- More biomass with equal or less water consumption
- Greater resilience to heat waves
Plant biotechnology can complement natural photosynthesis and help us achieve more yield with the same agricultural surface.
Next steps: from the laboratory to the field
Academia Sinica outlined a roadmap to scale this innovation:
- Transfer of the McG system to commercial crops
- Field tests to validate genetic stability and agronomic performance
- Regulatory optimization according to GMO and gene editing regulations
- Development of licenses and intellectual property for industrial distribution
Smart crops for a planet in crisis
This advancement not only promises greater agricultural productivity but also active contributions to climate change mitigation.
In a world that needs to capture more carbon and produce food sustainably, the modified plants from Taiwan could inaugurate a new generation of resilient, efficient, and regenerative crops.
