Postharvest changes in fruit pigment composition

1 Changes in colour according to fruit respiratory activity 

The respiration rate during ripening of fruit and vegetables is not uniform and changes depending on plant species. Respiration rate changes can distinguish 

During ripening of non-climacteric fruits like citrus, the process of colour change is named degreening and the natural loss of chlorophylls, accumulated into the chromoplasts of the epidermis (flavedo) and vesicles, and the concomitant manifestation and new biosynthesis of carotenoids, generally occurs very slowly (Eaks 1977). 

A certain activity of methyl jasmonate at about 8 ppm concentration for the acceleration of ripening in apples and degreening in oranges, dne to stimnlation of ethylene biosynthese, has been reported (Olias et al. 1990). However, these results seems to be inconsistent at least in orange (Artes et al. 1994, 2000). 

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