Changes in sugars, enzymic activities and acid phosphatase isoenzyme profiles of bananas ripened in air or stored in 2.5% O2 with and without ethylene

This study investigates the effect of 2.5% O2, both alone and in combination with ethylene, on respiration, sugar accumulation and activities of pectin methylesterase and acid phosphatase during ripening of bananas (Musa paradisiaca sapientum). In addition, the changes in the phosphatase isoenzyme p...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1989-05, Vol.90 (1), p.251-258
Main Authors: Kanellis, A.K. (Institute of Molecular Biology and Biotechnology, Iraklion, Crete, Greece), Solomos, T, Mattoo, A.K
Format: Article
Language:English
Subjects:
ACTIVIDAD ENZIMATICA
ACTIVITE ENZYMATIQUE
Air
ALMACENAMIENTO
AZUCARES
BANANE
BANANE PLANTAIN
BANANO
Biological and medical sciences
Enzymes
ESTERASAS
ESTERASE
ETHYLENE
ETILENO
FISIOLOGIA POSTCOSECHA
Food industries
FOSFATASA ACIDA
Fruit and vegetable industries
Fundamental and applied biological sciences. Psychology
Gels
ISOENZIMAS
ISOENZYME
MADURACION
MATURATION
Metabolism and Enzymology
OXIGENO
Oxygen
OXYGENE
Particulate matter
PHOSPHATASE ACIDE
Phosphatases
PHYSIOLOGIE APRES RECOLTE
Plants
PLATANO
Respiration
Ripening
STOCKAGE
SUCRES
Sugars
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Summary:This study investigates the effect of 2.5% O2, both alone and in combination with ethylene, on respiration, sugar accumulation and activities of pectin methylesterase and acid phosphatase during ripening of bananas (Musa paradisiaca sapientum). In addition, the changes in the phosphatase isoenzyme profiles are also analyzed. Low oxygen diminished respiration and slowed down the accumulation of sugars and development of the yellow color. Furthermore, low O2 prevented the rise in acid phosphatase activities and this suppression was not reversed by the inclusion of 100 microliters per liter ethylene in 2.5% O2 atmosphere. Gel electrophoresis of both the soluble and particulate cell-free fractions under nondenaturing conditions revealed the presence of 8 and 9 isoenzymes in the soluble and particulate fractions, respectively. Low O2 suppressed the appearance of all isoenzymes, and the addition of 500 microliters per liter ethylene to the low decline in pectin methylesterase that was observed in air-ripened fruits was prevented of 2.5% O2 alone and in combination with 500 microliters per liter ethylene
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.90.1.251