Articles
CHLOROPHYLL FLUORESCENCE AS A NONDESTRUCTIVE TOOL FOR DETECTION OF DETERIORATION OF MANGO IN MODIFIED ATMOSPHERE PACKAGING
Article number
837_37
Pages
279 – 284
Language
English
Abstract
Chlorophyll fluorescence was investigated as a possible nondestructive tool to detect injuries caused by low O2 and/or high CO2 in mango in a modified atmosphere pack.
Mature green fruit cv. Nam Dok Mai were packed in MTEC breathable film or in LDPE film and stored at 20 or 30°C. Chlorophyll fluorescence parameters (Fo-minimal fluorescence; Fm-maximal fluorescence; and Fv/Fm-potential quantum yield), CO2 and O2 concentrations in the package headspace, and the incidence of off-odors were determined every two days of storage.
Fruit packed in MTEC breathable film reached an equilibrium modified atmosphere whereas those in LDPE film accumulated high CO2 concentrations after 4 days in storage at both temperatures.
Fv/Fm and Fm were lower for fruit in LDPE film than in MTEC film and these differences increased with storage time.
Pronounced decreases in Fv/Fm and Fm occurred in fruit packed in LDPE film after 4 days of storage at both temperatures.
This was 2 and 4 days earlier than off odor development at 30°C and 20°C, respectively.
Chlorophyll fluorescence may therefore be used to predict abnormal changes before the development of detectable physical symptoms (e.g., off odor).
Mature green fruit cv. Nam Dok Mai were packed in MTEC breathable film or in LDPE film and stored at 20 or 30°C. Chlorophyll fluorescence parameters (Fo-minimal fluorescence; Fm-maximal fluorescence; and Fv/Fm-potential quantum yield), CO2 and O2 concentrations in the package headspace, and the incidence of off-odors were determined every two days of storage.
Fruit packed in MTEC breathable film reached an equilibrium modified atmosphere whereas those in LDPE film accumulated high CO2 concentrations after 4 days in storage at both temperatures.
Fv/Fm and Fm were lower for fruit in LDPE film than in MTEC film and these differences increased with storage time.
Pronounced decreases in Fv/Fm and Fm occurred in fruit packed in LDPE film after 4 days of storage at both temperatures.
This was 2 and 4 days earlier than off odor development at 30°C and 20°C, respectively.
Chlorophyll fluorescence may therefore be used to predict abnormal changes before the development of detectable physical symptoms (e.g., off odor).
Authors
W. Mekwatanakarn, R. Chairat
Keywords
nondestructive quality evaluation, anaerobiosis, storage
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