Abstract
UV-C (180-280nm) has been shown to extend the postharvest shelf-life of many horticulture crops. In this study, Tahitian limes (Citrus latifolia) were exposed to 0, 3.4, 7.2 and 10.5kJm-2UV-C then stored for 28days in air at 10°C and 80% RH. Weight loss, peel colour, calyx abscission, ethylene production, respiration rate, total soluble solids (TSS), titratable acidity (TA) and acceptability index were assessed. The results showed that UV-C treatment maintained lime peel green colour and retained calyx attachment after 28days storage. UV-C treatment also affected endogenous ethylene production and respiration rate, where the highest UV-C treatment (10.5kJm-2) maintained low ethylene production and low respiration rates after 28days storage with no differences between the different UV-C intensities. In terms of fruit acceptability, limes were exposed to 10.5kJm-2UV-C had a 60% acceptability index after 28days storage, while untreated control fruit retained acceptability of 39%. In general, the pre-storage UV-C treatments did not affect fruit weight loss, TSS or TA contents during storage.
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