Científicos chilenos aumentan los niveles de antioxidantes en tomates sin afectar el crecimiento de las plantas

Chilean scientists have made a significant breakthrough in enhancing the antioxidant levels of tomatoes without compromising the growth and development of the plants. A team of researchers from the University of Chile has achieved this by overexpressing the enzyme lipoyl synthase (LIP1) specifically in the tomato fruit. This has resulted in increased levels of lipoic acid, both free and bound to proteins, without affecting the plant's growth. The study, published in Frontiers in Plant Science, demonstrates that improving antioxidant levels modifies the fruit's metabolism while maintaining proper development. The research strategy was validated using Micro-Tom, a small-scale tomato plant model.

The research was conducted by scientists from the Center for Plant Molecular Biology at the University of Chile, who aimed to determine if it was possible to increase the antioxidant content in fruits and vegetables without compromising the plants' development. The project was led by Dr. María Paz Covarrubias and Dr. Michael Handford from the Department of Biology at the Faculty of Sciences of the University of Chile, along with other members of the research team.

The experimental results showed that overexpressing the lipoyl synthase (LIP1) enzyme significantly increased both free and protein-bound lipoic acid in tomato fruits. This modification altered key metabolic pathways in the fruit, without affecting the plant's growth or vegetative development. Lipoic acid is a unique antioxidant because it plays a dual role in cells: it neutralizes free radicals, protecting them from oxidative damage, and also acts as a cofactor for enzymes involved in energy metabolism, making it essential for cellular function.

Another distinctive feature of lipoic acid is its presence in two forms: free and bound to proteins. The free form contributes to antioxidant activity, while the bound form plays a role in cellular metabolism. The study's findings suggest that manipulating lipoic acid levels in plants could have a significant impact on their nutritional value and overall health benefits.

This research not only highlights the potential of genetic engineering to enhance the nutritional content of crops but also emphasizes the importance of maintaining plant growth and development during such modifications. By focusing on specific enzymes and metabolic pathways, scientists can potentially develop new strategies to improve the nutritional quality of fruits and vegetables while ensuring that the plants remain healthy and productive.

The successful application of this strategy in Micro-Tom, a small-scale tomato plant model, further validates the approach. This model allows researchers to study the effects of genetic modifications in a controlled environment, making it an invaluable tool for testing new strategies before they are applied to larger-scale cultivation.

In conclusion, the work of Chilean scientists from the University of Chile represents a promising step forward in the field of plant biotechnology. By increasing the antioxidant levels of tomatoes without affecting plant growth, they have demonstrated a viable method for improving the nutritional value of crops. This could have significant implications for global food security and public health, as more nutrient-dense crops can help combat deficiencies and contribute to healthier diets. The study's findings also underscore the importance of interdisciplinary research, combining knowledge from genetics, biochemistry, and plant physiology to achieve innovative solutions in agriculture.