Application of Prochloraz-nano-titanium Dioxide Complex Fresh-keeping Agent in Refrigeration of Dioscorea alata Lirm. sp

Prochloraz diluents (450×, 475×, 500×) were added with different concentrations of nano-titanium dioxide (TiO2) (0.8%, 1.0%) respectively to prepare complex fresh-keeping agents, which were applied in the refrigeration of Dioscorea alata Lirm. sp. With rot index, weight loss rate, browning degree (BD), total soluble solids (TSS) content, malondialdehyde (MDA) content, polyphenol oxidase (PPO) activity and peroxidase (POD) activity, DPPH• scavenging rate as evaluation indexes, the preservation effect of the prepared fresh-keeping agents on D. alata during the cold storage period was analyzed. The results showed that prochloraz added with nano-titanium dioxide significantly prolonged the storage life, reduced the rot rate and weight loss rate, and slowed the loss of pulp of D. alata. The preservation effect of complex fresh-keeping agent of prochloraz diluent (475×) and nano-titanium dioxide (1.0%) was better than that of other treatments.