Articles
CHLOROPHYLL FLUORESCENCE OF LONG ENGLISH CUCUMBER AFFECTED BY STORAGE CONDITIONS
Article number
517_57
Pages
449 – 456
Language
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.
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.
Authors
W.C. Lin, P.A. Jolliffe
Keywords
Cucumis sativus, chlorophyll fluorescence, greenhouse cucumber, postharvest, quality, stress
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