ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

New apple selections with inherently low ethene production.

Stow, J.; Alston, F.; Hatfield, S.; Genge, P.;

Acta Horticulturae Year: 1993 Issue: No. 326 Pages: 85-92 Ref: 10 ref.

1993

บทคัดย่อ

Some progeny of crosses between Gloster 69 and Fiesta (E19 family) and between Gloster 69 and T30/24 (E55 family) were found to be very slow to produce ethene (ethylene) when the fruits were stored in air at 4 deg C. In the former family, 42% of progeny took 4 weeks to reach an ethene production rate of 1 micro l kg-1 h-1, 33% took 5-17 weeks and the remainder had not exceeded this rate after 23 weeks. Experiments were carried out to determine the cause of the low ethene production rates. When fruits from a cultivar with a low ethene production rate were exposed to propene (propylene) (6000 micro l/litre), ethene production increased, suggesting that ethene receptors were still active. Ethene-forming-enzyme (EFE) activity and ACC concentration also increased in response to propene treatment. It was concluded that the delay to autocatalytic ethene production resulted not from a lowered activity of a single enzyme in the ethene biosynthetic pathway or from a lack of ethene receptors but from an enhancement of the inhibitory mechanism that prevents initiation of autocatalytic ethene production.