บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Biochemical basis of thermoregulation of ethylene production and ripening of 'Hayward' kiwifruit.

Antunes, M. D. C.; Sfakiotakis, E. M.;

Acta Horticulturae Year: 1997 Issue: No. 444 Pages: 541-546 Ref: 12 ref.

1997

บทคัดย่อ

Biochemical basis of thermoregulation of ethylene production and ripening of 'Hayward' kiwifruit.

The effect of temperatures from 10 to 40 deg C on the enzymes of the ethylene biosynthetic pathway was studied in connection with ripening induced by propylene. Hayward kiwifruits were treated or not treated with propylene (130 micro l/litre) at 10, 20, 30, 34, 38 or 40 deg for up to 320 h. Ethylene production, ACC content and ACC synthase and ACC oxidase activities, as well as changes in respiration rate, soluble solids content (SSC) and flesh firmness were measured during a storage period of 120-350 h. Propylene induced fruits to ripen in temperatures from 10 to 38 deg , while untreated controls showed no ripening response. Propylene also induced ethylene and ACC production in the temperature range 20-34 deg , with concomitant induction of ACC synthase and ACC oxidase activities. There was a strong inhibition of ethylene production at 10, 38 and 40 deg . Ripening, as evaluated by flesh firmness and SSC, was inhibited at high temperatures (38-40 deg ). As temperature was increased respiration r

ate was also increased. Propylene treatment enhanced respiration rate at all temperatures except 40 deg .