Evaluation of respiratory parameters in minimally processed lettuce grown under organic or conventional system

Revista Ceres

Júlio César Mello²  Renato Dietrich¹  Luiz Fernando Dias Probst¹  Edna Regina Amante¹ 

[1] ,Empresa de Pesquisa Agropecuária de Santa CatarinaFlorianópolis SC ,Brasil

关键词: Post harvest;    storage;    shelf life;    Pós-colheita;    conservação;    vida de prateleira;   

DOI  :  10.1590/S0034-737X2010000600005

来源: SciELO

【 摘 要 】

The increased preference for minimally processed vegetables has been attributed to the health benefits associated with fresh produce and the demand for ready-to-eat salads. In this paper, lettuce (Lactuca sativa L.) was evaluated for the effects of different cropping systems on the respiratory properties. Lettuce was packaged in low density polyethylene bags and stored in a refrigerator at 4 ºC. The concentration of carbon dioxide and oxygen inside the package was monitored during the storage at zero, three, six, eight, ten and twelve days by gas chromatography. Dry matter variation was measured gravimetrically up to day fourteen of storage. Values of respiratory rate for conventional lettuce increased from day 1 to 3 and remained low, while respiratory rate of the organic lettuce increased three-fold up to day 8, stabilizing at a high level. Variation in dry matter during storage also resulted from differences between the two cultivation systems. The highest content of dry matter was achieved by organic lettuce.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License