ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Changes in ethylene rate and ground color in peaches (cv. Red Haven and Marqueen) and nectarines (cv. Fantasia) during maturation and ripening.

Luchsinger, L. E.; Walsh, C. S.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 70-72

1993

บทคัดย่อ

Studies were carried out to find objective maturity indices that were correlated with physiological maturity for each cultivar. Fruit maturation on the tree was monitored by harvesting fruits of similar diameter and tree position every 4 days. Ethylene rate (using a static system) and ground colour (Hunter a value) were measured after one day at 20 deg C. Firmness and soluble solids content were measured for half the number of harvested fruits. Remaining fruits were held for 7 days at 20 deg before further measurements were made. Daily measurements of ethylene rate and ground colour were also made on fruits held in individual jars in a flowing system. In addition, firmness and soluble solids content were measured in Fantasia and Marqueen fruits sorted by ground colour as a harvest index. The capacity of fruits to fully soften developed prior to the upsurge in ethylene production rate in all cultivars studied. There was a significant increase in ethylene production rate after the fruits were deta ched from the tree. Ground colour was found to be an effective maturity index but should be tested for each cultivar at a specific maturity stage. A quadratic model to predict maturity stage for Red Haven fruits was developed.