ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of high temperature on ethylene biosynthesis by tomato fruit.

Atta-Aly, M. A.;

Postharvest Biology and Technology Year: 1992 Vol: 2 Issue: 1 Pages: 19-24 Ref: 18 ref.

1992

บทคัดย่อ

Tomato fruits (cv. Rutgers) were harvested at the breaker stage and stored at 15 deg C. When fruits had ripened to the pink stage they were transferred, at 6-h intervals, from 15 to 20 deg , then to 25 and 30 deg , and finally returned to 20 deg . As the temperature increased from 15 to 30 deg , CO2 production by the fruits significantly increased. Maximum C2H4 production occurred when fruits were held at 20 deg . As the temperature rose from 20 to 30 deg , both C2H4 production and the ACC level declined. The same levels of C2H4 were produced by fruits held at 20 deg whether they had been previously held at 15 or 30 deg , indicating that the effect of temperature on C2H4 production is reversible. When a sample of fruits at the pink stage was held at 35 deg , the ACC level increased sharply while C2H4 production continued to decrease. In excised pericarp discs, ACC conversion to C2H4 increased as the temperature increased and reached its maximum rate at 30 deg , but was inhibited at 35 deg . The inhibition of C2H4 biosynthesis at temperatures between 20 and 30 deg is attributed only to a reduction in ACC synthesis. At 35 deg , however, both ACC synthesis and its conversion to C2H4 were inhibited.