บทคัดย่องานวิจัย

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Regulation of propylene induced ripening and ethylene biosynthesis by oxygen concentration in "Hayward" kiwifruit.

Stavroulakis, G.; Sfakiotakis, E. M.;

Acta Horticulturae Year: 1997 Issue: No. 444 Pages: 529-534 Ref: 15 ref.

1997

บทคัดย่อ

Regulation of propylene induced ripening and ethylene biosynthesis by oxygen concentration in "Hayward" kiwifruit.

Harvested kiwifruits (from Pieria, Greece) were treated with 130 micro l propylene/litre in a 1, 5, 10, 13, 16 or 21% O2 gas mixture in a continuous flow-through system at 20 deg C. Control fruits were kept in air (21% O2). Flesh firmness, soluble solids content, internal ethylene concentration, ACC concentration and ethylene-forming enzyme (EFE) activity were measured during the experiment. Ethylene biosynthesis and fruit ripening were stimulated when fruits were exposed to a mixture of propylene in air. Reduction of oxygen concentration (<10%) inhibited the effect of propylene on autocatalytic ethylene production. Exposure of fruits to low oxygen concentration (<5%) delayed propylene-induced ripening. The great difference between the oxygen concentrations at which the half maximum rates of ripening (3% O2) and autocatalytic ethylene production (10.3% O2) occurred demonstrated the independence of the 2 processes in kiwifruit.