Physiochemical characterization of tomato lycopene content, tree spinach cyanogenic glycosides and anti-microbial activity of Osage-orange fruit.

摘要

Phytochemical analyses of lycopene content in tomato (Lycopersicon esculentum) varieties, cyanide content in two edible tree spinach ((Cnidoscolus chayamansa and Cnidoscolus. aconitifolius ) and antimicrobial activity of Osage orange (Maclura pomifera ) were investigated. Significant differences (p < 0.05) were observed in lycopene content among the tomato varieties grown in the greenhouse and on the field. Variations in genetics, location, cultural practices used in production and harvest time significantly affected lycopene content of the tomatoes.;There were variations in cyanide contents of the two Cnidoscolus species used. Distribution of cyanide within the plant tissues was consistent with the analytical methods used and cyanide level was significantly (p < 0.05) increased in frozen plant samples. Aqueous and organic extracts of Osage orange exhibited antimicrobial activity to toward foodborne bacteria and storage pathogens. Effect concentrations (EC50 ) for antimicrobial activity was superior to Dithane M-5, a commercial fungicide.