Titre :
|
Effect of chilling and irradiation on the ultrastructure of the membranes and mitochondria of fruits and vegetables
|
Auteurs :
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E. Kovacs
|
Type de document :
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article/chapitre/communication
|
Année de publication :
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1997
|
Format :
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p. 359-381
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Langues:
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= Anglais
|
Catégories :
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QUALITE DES PRODUITS ALIMENTAIRES
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Mots-clés:
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FRUIT
;
LEGUME
;
REFRIGERATION
;
IRRADIATION DES ALIMENTS
;
HISTOLOGIE
;
LIPIDE
;
MEMBRANE
;
CELLULE
|
Résumé :
|
Ultrastructural effects of irradiation were investigated on the specific constituents of plant cells, primarily in fruits.The effect of aging and environmental factors, especially cold, chilling and irradiation on the membranes and mitochondria are summarized. During fruit ripening, progressive loss of membrane function occurs. The changes were correlated with the lipid composition of the membranes. There is also evidence of changes in membrane viscosity/fluid. Temperature dependent changes can be observed in membranes. Low temperature (10 °C, chilling) have a drastic effect on cellular structure. Mitochondria are swollen, and membranes are disorganized. Irradiation induced membrane permeability (electrolyte leakage), and free radicals were formed as a result of ionizing radiation. The changes noticed in the matrix and cristae of mitochondria occur mainly at radiation doses higher (5 kGy) than practical doses (upto 2.5 kGy).
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Source :
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Acta alimentaria, vol.26, n°4
|