Although the relaxation times were in part explained by chemical composition and cell dimensions, their changes during ripening were not correlated with these properties. Indeed, the water content didnot changewhereas the T2 and T1 decreasedfor themajority of tissues. Concentrations of sugars and acids did not change considerably during the ripening period and there was no correlation between concentrations and relaxation times. No variations in cell sizes or organization were observed during ripening and therefore cell size effects could not explain T2 changes. One explanation could be a variation in membrane permeability since it is theoretically related to T2. It would therefore be interesting to investigate the changes in permeability during ripening by pulsed field gradient NMR to validate this assumption. Furthermore, it is likely that concentrations of paramagnetic mineral elements such as K, Na, Mn orCu vary and affect T1 relaxation.