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Wound ethylene biosynthesis in preclimacteric banana slices.

Dominguez, M.; Vendrell, M.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 270-274 Ref: 10 ref.

1993

บทคัดย่อ

Wound ethylene biosynthesis in preclimacteric banana slices.

Transverse banana slices (6 mm thick) are considered representative of whole fruit and can be vacuum-infiltrated to test active substances. However, the manipulation, cutting and treatment of these slices affects their physiological behaviour. The effect of cutting on the biosynthesis of ethylene in response to stress was investigated using slightly immature bananas (cv. Dwarf Cavendish). Ethylene production increased immediately after cutting reaching a maximum of 1.3 nl g-1 h-1 after about 6 h and then decreasing to low levels in less than 24 h. 1-Aminocyclopropane-1-carboxylic acid (ACC) levels in the pulp increased immediately afer cutting, reaching a peak in about 6 h. This increase in ACC levels induced a sharp increase in ethylene production. In the peel there was a considerable increase in ethylene-forming enzyme activity after the ethylene peak. It was concluded that stress ethylene appears to be localized at the damage zone, i.e. the 2 mm zone immediately next to the cut surface of thefruit.