บทคัดย่องานวิจัย

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Reduction in storage decay in apples by postharvest calcium infiltration.

Conway, W. S.; Sams, C. E.; Tobias, R. B.;

Acta Horticulturae Year: 1993 Issue: No. 326 Pages: 115-121 Ref: 26 ref.

1993

บทคัดย่อ

Reduction in storage decay in apples by postharvest calcium infiltration.

Both total and cell wall bound calcium of apple fruit tissue increased when fruits were pressure infiltrated at harvest with varying amounts of calcium chloride solutions. Inoculation of calcium treated fruit after storage with either Penicillium expansum, Botrytis cinerea or Glomerella cingulata resulted in less decay than in non-treated fruit. The effect was, however, differential, depending upon the pathogen involved. When polygalacturonase was purified from P. expansum decayed apple tissue and apple cell walls with varying amounts of calcium used as a substrate, less product was formed as a result of enzyme maceration in high calcium cell walls compared with low calcium cell walls. Likewise, when B. cinerea decayed apple tissue containing high or low amounts of calcium was analysed, the results indicated that the effect of calcium in reducing decay is associated with maintaining cell wall structure by delaying or modifying chemical changes in cell wall composition. This paper was presented at the International Symposium on pre- and postharvest physiology of pome-fruit held at Sint Truiden, Belgium, 9-13 June 1992.