บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Fruit canopy position effects on quality and storage response of 'Tarocco' oranges.

Agabbio, M.; D'hallewin, G.; Mura, M.; Schirra, M.; Lovicu, G.; Pala, M.;

Acta Horticulturae Year: 1999 Issue: No. 485 Pages: 19-23 Ref: 9 ref.

1999

บทคัดย่อ

Fruit canopy position effects on quality and storage response of 'Tarocco' oranges.

 

Quality characteristics of mature Tarocco oranges harvested at commercial maturity in southern Sardinia, Italy from the northern, southern and interior parts of the tree canopy were investigated during 10 weeks of storage at 9 deg C plus one week of simulated marketing (SM) at 21 deg C. No significant differences in fruit weight loss or percentage decay were observed after 5 or 10 weeks of storage. After SM, weight loss was significantly higher in fruits from the northern part of the canopy. Differences in weight loss between fruits from interior and southern parts were insignificant. Percentage decay was significantly lower in fruits from the southern part with minimal differences between fruits from the northern and interior parts of the canopy. Colour values were significantly higher in fruits from the interior part of the canopy. After SM, colour differences were insignificant. Fruit canopy position did not affect endogenous ethylene concentration. At harvest and after 10 weeks of storage, r

espiration rate was highest in fruits from the northern part of the canopy and lowest in fruits from the southern part of the canopy. After SM, differences in respiration rates were not significant. Freshly harvested fruits from the external southern part of the tree had higher soluble solids concentration (SSC) and lower acid levels, resulting in higher SSC:acid ratios and improved taste in comparison to fruits from northern and interior parts of the canopy. By the end of SM, these differences tended to level out. At harvest, ethanol level in the juice was significantly higher in fruits from the southern part of the canopy. By the end of storage and after SM, a sharp increase in ethanol concentration was detected in all samples, with no significant differences in relation to canopy position. SM resulted in off-flavour development, presumably due to the high levels of ethanol in the juice.