Home > International Conference on Quality in Chains. An Integrated View on Fruit and Vegetable Quality > POSTHARVEST CHANGES IN CARBOHYDRATE CONTENT OF LAMB’S LETTUCE (VALERIANELLA LOCUSTA)

Articles

POSTHARVEST CHANGES IN CARBOHYDRATE CONTENT OF LAMB’S LETTUCE (VALERIANELLA LOCUSTA)

Article number

604_65

Pages

553 – 558

Language

English

Abstract

   Lambs 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 lambs lettuce during postharvest.
   During 5 days storage of lambs lettuce at 20 °C, the contents of glucose and fructose were almost constant, while sucrose declined rapidly.
Lambs 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.

Publication

International Conference on Quality in Chains. An Integrated View on Fruit and Vegetable Quality

Authors

A. Enninghorst, F. Lippert

Keywords

lamb¿s lettuce, respiration, sugar content, carbohydrates, temperature, carbon loss, storage

Full text

https://doi.org/10.17660/ActaHortic.2003.604.65

Online Articles (105)

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M.D.C. Antunes | M.P. Correia | M.G. Miguel | M.A. Martins | M.A. Neves

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