ISHS Acta Horticulturae 517: XXV International Horticultural Congress, Part 7: Quality of Horticultural Products
CHLOROPHYLL FLUORESCENCE OF LONG ENGLISH CUCUMBER AFFECTED BY STORAGE CONDITIONS |
| Authors: | W.C. Lin, P.A. Jolliffe |
| Keywords: | Cucumis sativus, chlorophyll fluorescence, greenhouse cucumber, postharvest, quality, stress |
| Abstract:
Greenhouse-grown cucumber (Cucumis sativus L. cv. Mustang) fruit were harvested and subjected to various storage treatments in two experiments. Fruit were then held in darkness for 1 h before chlorophyll fluorescence was measured. In the first experiment, stored cucumber showed a rapid decline in non-variable fluorescence (Fo), maximal fluorescence (Fm) and variable fluorescence (Fv) over 2 days, regardless the storage temperatures of 1°C, 13°C or 22°C. The Fv/Fm declined in 6 days at 1°C, 19 days at 13°C, and 14 days at 22°C. similarly, Fv/Fo declined over 6 days at 1°C, 19 days at 13°C, and 16 days at 22°C. In the second experiment, cucumber fruit stored at 13°C had lower Fo and Fm after 1 day, and these parameters continued to decline thereafter. Fv/Fm and Fv/Fo at 13°C increased on 1 day, and then declined toward the end of storage. Desiccation during 13°C storage resulted in low Fo, high Fv/Fm and Fv/Fo. The measurement of chlorophyll fluorescence can be a useful tool in monitoring senescence, temperature stress, and desiccation during storage. Under some circumstances, some fluorescence parameters may be used as quality indicators for postharvest handling procedures of greenhouse cucumbers. | |
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