Fluctuations in sugar content are not determinant in explaining variations in vitamin C in tomato fruit
2010
Massot , Capucine (INRA , Avignon (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles) | Génard , Michel (INRA , Avignon (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles) | Stevens , Rebecca (INRA (France). UR 1052 Génétique et Amélioration des Fruits et Légumes) | Gautier , Helene (INRA , Avignon (France). UR 1115 Unité de recherche Plantes et Systèmes de Culture Horticoles)
The present study aimed to clarify the relationship between sugars and vitamin C in fruit. The objective was to determine whether vitamin C content was regulated by sugar content due to the role of sugar as a precursor for vitamin C. During summer, maximal content in sugar and vitamin C were found in both genotypes tested Solanum lycopersicon ‘Cervil’ and ‘Levovil’. During autumn, fruit pruning increased fruit size and hexose content but fruit vitamin C content did not increase. Therefore sugar substrate was not limiting for vitamin C synthesis during autumn. We demonstrated for two cultivars, ‘Cervil’ and ‘Levovil’, with different sugar accumulation profiles during ripening, that sugar content was not determinant in the regulation of vitamin C content. The strong correlation observed between sugars and vitamin C in ‘Cervil’ was due to their concomitant increase during fruit ripening
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