ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Ethylene biosynthesis of quince during storage

Gunes N.T., Koksal A.L.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004. page 12

2004

บทคัดย่อ

 In order to determine change in some physiological and quality parameters, quince fruits of Cukurgobek and Esme cultivars, were harvested just after climacteric minimum in respiration rate occurred and transferred to the storage rooms having 2+1 °C temperature and 85-90%relative humidity during two years.After each month, fruits were transferred to the ripening rooms having 20°C temperature and 85-90% relative humidity conditions.

Internal ethylene concentration and external ethylene production, 1-aminocyclopropane-1-carboxylic acid (ACC) oxidize activity, respiration rate, sugar (sucrose, glucose and fructose) and organic acid (citric and malic acid) contents, weight loss, fruit taste, flesh browning were analysed with monthly periods for cold storage and with weekly periods for ripening conditions.For the first year, internal ethylene concentration, external ethylene production and ACC-oxidize activity of Cukurgobek and Esme fruits changed between 0.9-4.7 ïL L^-1, 0.0-5.2 ïL L^-1, 0.010-0.030 nmol kg^-1s^-1,0.001-0.034 nmol kg^-1s^-1, 0.5-1.5 ïL L^-1, 0.3-1.0 ïL L^-1, respectively.These values were recorded as 0.1-0.4 ïL L^-1, 0.5-2.3 ïL L^-1, 0.01-0.017 nmol kg^-1s^-1, 0.006-0.030 nmol kg^-1s^-1, 0.4-2.4 ïL L^-1, 0.3-2.3ïL L^-1, in the second year respectively.Otherwise a sharp increase in these parameters could not be observed during storage trials.These parameters showed fluctuations during ripening periods.Although flesh firmness and fruit colour hue values were tended to moderately decrease in both cultivar and year, sugar and organic acid content of fruit juices showed unstable change.Fructose and malic acid were determined as dominant sugar and organic acid for both cultivars.