ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Some physiological and biochemical changes of "green ripe" bananas at relative high storage temperatures.

Zhang, D.; Huang, B. Y.; Scott, K. J.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 81-85

1993

บทคัดย่อ

In South China, bananas are harvested mainly in the hot summer and autumn and are often marketed in a condition known as 'green ripe' where the pulp is already soft while the peel is still green. Banana fruits (cv. Dwarf Cavendish) were harvested at 80% maturity and dipped in 500 p.p.m. Benlate [benomyl]. Some fruits were packed in polyethylene bags (1 kg fruit/bag). CO2 and ethylene contents and respiration rate were measured during storage of packed or non-packed fruits at 20 or 30 deg C for up to 30 days. Samples were analysed for enzyme activity and chlorophyll content. Scanning electron microscopy was used to observe the cell wall structure of the cut surfaces of pulp and peel. CO2 and ethylene contents increased gradually during storage in polyethylene bags and peaked 3 or 4 days earlier at 30 deg than at 20 deg . The climacteric peak and the peaks of ethylene production of non-packed fruits appeared 14 days earlier at 30 deg than at 20 deg . The peak of polygalacturonase activity appeared 9 days earlier at 30 deg than at 20 deg . Chlorophyll breakdown was inhibited at 30 deg but at 20 deg chlorophyll content decreased by 79%. It was concluded that high temperatures accelerate softening of the pulp and inhibit chlorophyll breakdown in the peel thus leading to the 'green ripe' condition.