Chromatographic estimation of sugars from the components of developing fruits of early- and late-maturing peach cultivars

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SummaryCvs Flordasun (early) and Sharbati (late) both showed a double sigmoid pattern of fruit growth, more pronounced in the latter. Sucrose was the main sugar in the developing whole fruits, but in the flesh it predominated only during early growth, glucose later becoming the main sugar. The levels of total sugars, sucrose and glucose were high in Flordasun whole fruit during Stage I and in Sharbati during Stage III. No difference in total sugars was evident during Stage II between these cultivars, but Sharbati contained more sucrose and Flordasun more fructose. In the flesh the level of total sugars in 1978 during Stages I and II was the same as in the whole fruit during 1977. However, during Stage III Flordasun flesh had more sugars, mainly sucrose, than Sharbati. Flordasun flesh contained more fructose than Sharbati throughout the development period.