บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Postharvest changes in carbohydrate content of Lambs lettuce (Valerianella locusta)

A. Enninghorst, F. Lippert

ISHS Acta Horticulturae 604:553-558.

2003

บทคัดย่อ

Postharvest changes in carbohydrate content of Lambs lettuce (Valerianella locusta) Lamb’s lettuce (Valerianella locusta), as a leafy vegetable, has no significant pool of carbohydrates or other respiratory substrates. Thus the photosynthetic carbohydrates built up during pre-harvest are the o­nly source of respiratory substrates. Aim of the present study was to evaluate carbohydrate contents of lamb’s lettuce during postharvest.

During 5 days storage of lamb’s lettuce at 20 °C, the contents of glucose and fructose were almost constant, while sucrose declined rapidly. Lamb’s lettuce stored for 8 days at 0-30°C showed a similar pattern. The higher the storage temperature the earlier sucrose declined whereas glucose and fructose remained constant at low temperatures and o­nly started to decline at storage temperatures higher than 10°C.

Carbon losses calculated o­n the base of CO2 production were compared to carbon losses calculated based o­n the measured levels of sucrose, fructose and glucose. As a result we found a ratio of nearly 1 straight after harvest, linearly declining during subsequent storage at 20°C.