Iodine biofortification in tomato
Martina Landini
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, Italy
Search for more papers by this authorSilvia Gonzali
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, Italy
Search for more papers by this authorCorresponding Author
Pierdomenico Perata
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, Italy
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, ItalySearch for more papers by this authorMartina Landini
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, Italy
Search for more papers by this authorSilvia Gonzali
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, Italy
Search for more papers by this authorCorresponding Author
Pierdomenico Perata
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, Italy
PlantLab, Scuola Superiore Sant'Anna, Via Mariscoglio 34, 56124, Pisa, ItalySearch for more papers by this authorAbstract
Iodine is an essential element in the human diet, and iodine deficiency is a significant health problem. No attempts to increase iodine content in plant-derived food (biofortification) have so far been particularly effective. We studied iodine uptake in tomato (Solanum lycopersicum L.) to evaluate whether it is possible to increase the iodine concentration in its fruits. Iodine translocation and storage inside tomato tissues were studied using radioactive iodine. Potassium iodide was also supplied at different concentrations to tomato plants to evaluate the resulting iodide concentration both in the vegetative tissues and the fruits. The results indicate that iodine was taken up better when supplied to the roots using hydroponically grown plants. However, a considerable amount of iodine was also stored after leaf treatment, suggesting that iodine transport through phloem also occurred. We found that tomato plants can tolerate high levels of iodine, stored both in the vegetative tissues and fruits at concentrations that are more than sufficient for the human diet. We conclude that tomato is an excellent crop for iodine-biofortification programs.
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