บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Physicochemical characterisation of the postharvest senescence of the winter melon Tendral.

Barreiro, M. da G., Lidon, F. C. and Pinto, M.

Fruits: 56. 2001. pp. 51-58.

2001

บทคัดย่อ

Physicochemical characterisation of the postharvest senescence of the winter melon 'Tendral'.

Senescence of the mesocarp of winter melons (cv. Tendral), stored at 12 deg C/75% RH, was investigated over 100 days. During storage, starch and sucrose became increasingly hydrolysed while the levels of reducing sugars increased. In this period, firmness and titratable acidity decreased, but concentrations of protein and lipoperoxide increased. Colour parameters (L, a,b) also changed, with b showing the largest increase after harvest. Ethylene concentration was low, but production of carbon dioxide varied. The activities of catalase and glutathione reductase increased whereas those of ascorbate peroxidase and superoxide dismutase were inhibited. It was concluded that fruit senescence was associated with starch and sucrose consumption, the synthesis of organic acids required for respiratory metabolism, and the accumulation of hydrogen peroxide and superoxide triggering lipoperoxidation of cellular membranes.