Pectic substances in lettuce with and without film packaging during shelf life (samples with different letters are significantly different)
Treatment Soluble pectin
(mg/g dm) Insoluble pectin
(mg/g dm) Total pectin
(mg/g dm)
Control 19.64 n.s. 20.78 b 73.48 n.s. Without film 15.31 n.s. 31.75 a 75.07 n.s. With film 15.50 n.s. 22.39 b 73.81 n