ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Changes in abscisic acid content of peel and pulp of 'Jonagold' apples during pre- and post-harvest periods.

Uthaibutra, J.; Gemma, H.;

Journal of the Japanese Society for Horticultural Science Year: 1991 Vol: 60 Issue: 2 Pages: 443-448 Ref: 17 ref.

1991

บทคัดย่อ

A study was carried out on apple cv. Jonagold fruits collected from trees growing at the University of Tsukuba orchard. Fruits were harvested at 10- and 15-day intervals from 25 June to 3 Oct. 1989 for the pre-harvest study, and on 23 Sep. 1989 for the postharvest study. Harvested fruits were placed in batches of 15 in corrugated cardboard cartons, then kept at 20 deg C and 90-95% RH for 40 days. Fruit firmness, membrane permeability (electrolyte and K+ ion leakages), and anthocyanin and ABA contents were measured at each sampling date and at 10-day intervals during storage. Fruit firmness decreased and electrolyte and K+ ion leakages increased during the pre- and postharvest periods, with both leakages being higher from the pulp tissues than from the peel tissues. Anthocyanin content decreased during the preharvest stage from 60 days after full bloom (DAFB) to 105 DAFB and then increased up to maturity (150-160 DAFB). Anthocyanin content gradually decreased during the postharvest storage period. ABA contents of peel and pulp tissues remained below 30 ng/g DW from 60-105 DAFB and then increased to >50 ng/g in the period up to 160 DAFB. During the postharvest period ABA content of peel tissues continued to increase for up to 30 days of storage and then remained constant, whereas ABA content of pulp tissues increased to about 90 ng/g at 40 days of storage. The increase in ABA content during the pre-harvest period parallelled the increase in anthocyanin content. It is concluded that endogenous ABA may play a role in anthocyanin synthesis during the pre-harvest period and in the senescence process through the increase in membrane permeability during the postharvest period.