ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Partial pressure calcium infiltration of mangoes did not delay softening.

Joyce, D. C.; Shorter, A. J.;

Proceedings of the Australasian postharvest horticulture conference 'Science and technology for the fresh food revolution', Melbourne, Australia, 18-22 September, 1995. Year: 1996 Pages: 261-265 Ref: 13 ref.

1996

บทคัดย่อ

Softening of Kensington, Sensation, Palmer and Irwin mango fruits treated at commercial harvest maturity by partial pressure (-33 kPa) infiltration with 4% (w/v) CaCl2 solution was monitored. In addition, the response of Kensington and Sensation fruits at earlier and later stages of maturity ( plus or minus 3 weeks) was assessed. In no instance was softening delayed, nor was an appreciable increase in Ca content detected in either skin or flesh tissue. Nevertheless, minor Ca treatment damage to lenticels was observed for some treatments. Infiltration of Brilliant Blue food dye under the same treatment conditions revealed limited penetration of the dye via many, but not all, lenticels. The pattern of penetration via lenticels over the fruit surface was irregular. Analysis of tissue Ca in the vicinity of uncoloured and coloured lenticels of fruits coinfiltrated with dye and Ca revealed larger quantities of Ca around coloured lenticels. Examination of uncoloured and coloured lenticels by scanning e

lectron and light microscopy did not reveal obvious differences in their surface or subsurface structures, respectively. Infiltration of Kensington mangoes at lower partial pressures was also examined. Dye infiltration at -66 and -99 kPa revealed progressively more extensive penetration, although partial pressures caused more extensive lenticel injury. Due to poor calcium uptake and the risk of lenticel damage, it was concluded that reduced pressure calcium treatment of mangoes is unlikely to be applied commercially.