ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Use of diazocyclopentadiene to block ethylene action in fruits and flowers.

Blankenship, S. M. and Sisler, E. C.

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 215-216 Ref: 3 ref.

1993

บทคัดย่อ

Diazocyclopentadiene (DACP) has been found to bind to the ethylene binding sites in plants and to prevent ethylene action. Apples (cv. Red Delicious), bananas, tomatoes, petunias and carnations were treated with DACP (as a gas) for at least 1 h, containers were then aired and, if applicable, exogenous ethylene was added. Ripening and senescence indices such as fruit firmness, internal ethylene concentration, peel colour, flower senescence and starch-iodine test were assessed. DACP strongly suppressed internal ethylene concentration in apple fruits subsequently stored at 21 deg C for 10 days but, by 30 days, internal ethylene levels had increased to near those of untreated fruits. Fruit firmness was approx. 73 N for DACP-treated apple fruits held at 21 deg compared with 46 N for untreated fruits. Banana fruits required exposure to approx. 1 mu l DACP/litre to suppress peel colour changes. The fruits did eventually ripen after treatment, but they showed a commercially unacceptable peel discoloration and blotchy ripening. Mature green tomatoes treated with DACP and then held at 14 deg were completely green after 18 days while untreated tomatoes were fully red. At 21 deg , DACP-treated tomatoes ripened after 8-10 days. DACP gave comparable results to silver thiosulphate in retarding flower senescence.