Effect of phytic acid on Gynura bicolor D.C quality during cold storage

The effect of phytic acid( PA,0,0.1,0.5 and 1mmol/L) on the preservation and nutritional quality of fresh Gynura bicolor DC.( G.bicolor) were investigated during cold storage.Both experimental and control samples were wrapped in 15μm thick high-density polypropylene( HDPE) bags( 500 g/bag) and stored at 0℃ for 15 d. The nutrition and quality indices,including decay,respiration rate,anthocyanin,chlorophyll,amino acid,protein,total carbohydrate,and reducing sugar were tested every 5d. The results showed that 0.5mmol/L PA treatments significantly inhibited G.bicolor respiration and maintained higher contents of anthocyanin,chlorophyll,amino acid,total phenolics,free phenol,protein,total carbohydrate,and reducing sugar. Therefore,0.5mmol/L PA treatment was potentially applicable in extending the storage life of G. bicolor while 1.0mmol/L PA could accelerate the deterioration of G.bicolor quality.