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Beta-carotene content of postharvest orange-fleshed muskmelon fruit: effect of cultivar, growing location and fruit size.

Lester, G. E.; Eischen, F.;

Plant Foods for Human Nutrition Year: 1996 Vol: 49 Issue: 3 Pages: 191-197 Ref: 14 ref.

1996

บทคัดย่อ

Beta-carotene content of postharvest orange-fleshed muskmelon fruit: effect of cultivar, growing location and fruit size.

The influence of 2 growing locations (soil types), 6 fruit sizes and 2 years on the postharvest beta -carotene concentration of muskmelon fruits was studied with cultivars Cruiser and Primo. Fully abscised, commercial-size fruits (9, 12, 15, 18, 23 and 30 fruits/0.04-m3 shipping box) had highly variable beta -carotene concentration (5.3-33.8 micro g/g FW) that differed with size class, soil type and cultivar. beta -Carotene concentration increased with fruit size up to 15 fruits/box, then levelled off. Fine sandy loam soil produced fruits with lower beta -carotene concentration than silty clay loam soil. Cv. Primo had a higher beta -carotene concentration than cv. Cruiser. Mesocarp percentage moisture content for both cultivars at both locations by fruit size was not significantly correlated with beta -carotene concentration, indicating that fruit cell dilution may not contribute to the differences in beta -carotene concentration in different fruit size classes. In a second experiment, beta -car

otene concentration in fruits of 6 cultivars in size class 18/box grown on silty clay loam soil for 2 consecutive years showed a year and year x cultivar effect for some cultivars, whereas others did not differ in beta -carotene concentration between the 2 years. This indicates a potential for controlling beta -carotene concentration of muskmelons at a constant, high level by careful selection of productive cultivars.