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Physiology of CA treated produce.

Author(s) : KADER A. A.

Summary

Storage of fresh horticultural perishables within the optimum range of low oxygen and/or elevated carbon dioxide atmospheres for each commodity reduces their respiration and ethylene production rates. However, outside this range, respiration and ethylene production rates can be stimulated indicating a stress response, which can contribute to incidence of physiological disorders and increased susceptibility to decay. Exposure to 30-80 kPa oxygen atmospheres stimulates respiration and ethylene production and action in some commodities. Carbon dioxide-enriched atmospheres inhibit activity of ACC synthase, while ACC oxidase activity is stimulated by low carbon dioxide and inhibited at high carbon dioxide and/or low oxygen concentrations. Ethylene action is inhibited by elevated carbon dioxide atmospheres. Optimum CA Ethylene action is inhibited by elevated carbon dioxide atmospheres. Optimum CA retard loss of chlorophyll, biosynthesis of carotenoids and anthocyanins, and biosynthesis and oxidation of phenolic compounds. CA reduce the activity of cell wall degrading enzymes. CA influence flavour quality. Retention of ascorbic acid and other vitamins results in better nutritional quality, including antioxidant activity, of fruit and vegetables when kept in their optimum CA.

Details

  • Original title: Physiology of CA treated produce.
  • Record ID : 2004-1790
  • Languages: English
  • Publication date: 2003
  • Source: Source: Proc. int. CA Conf./Acta Hortic.
    n. 600; 349-354; tabl.; ref.
  • Document available for consultation in the library of the IIR headquarters only.

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