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  • Author or Editor: E. F. Poenicke x
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Ethylene is produced by cucumber fruits (Cucumis sativus L.), at a rate which is size dependent. Small fruits (<2.6 cm diam) produced substantially more ethylene/kg fruit than did large fruits (2.6-3.8 and 3.8-5.1 cm diameter). Respiration was similarly affected. Mechanically harvested fruits produced 2 to 3 times more ethylene than did hand-harvested fruits. Texture profile analysis (TPA) of cross-sections of fruits treated 48 hr with 0, 0.1, 0.5, 1.0, 5.0 and 10.0 µl/liter ethylene indicated little change in textural parameters at concentrations below 10.0 µl/liter. Ethylene treatment, especially high concentrations, decreased fruit chlorophyll content. Greatest chlorophyll loss was at the stem-end of the fruit. Ambient concentrations of ethylene in well-ventilated trucks of cucumbers were not great enough to present a quality problem for processing cucumbers.

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