Effects of nano-TiO2-LDPE packaging on postharvest quality and antioxidant capacity of strawberry (Fragaria ananassa Duch.) stored at refrigeration temperature.
BACKGROUND
Nano-TiO2-low-density polyethylene (NTLDPE) packaging was prepared, and the effects of NTLDPE packaging on quality and antioxidant capacity of strawberry fruits were investigated.


RESULTS
With increased barrier properties, NTLDPE packaging quickly formed a relative lower O2and higher CO2air composition in comparison with LDPE. It was also more efficient in maintaining the overall quality of strawberry fruit, as reflected by lower decay rate and weight loss, as well as retarding the decrease in firmness and titratable acid. Meanwhile, reactive oxygen species (ROS) including superoxide anion and hydrogen peroxide in NTLDPE-packed fruits were 10.8% and 21.9% lower, respectively. Furthermore, the activities of antioxidant enzymes involved in ROS scavenging in NTLDPE-packed fruits were significantly higher at the later period of storage time. Anthocyanin accumulation was inhibited, whereas ascorbic acid and total phenolics contents were better retained and 1-diphenyl-2-picrylhydrazyl radical scavenging activity was 13.2% higher in NTLDPE-packed fruit by the end of storage.


CONCLUSIONS
These data indicate that the beneficial effects of NTLDPE packaging on postharvest quality and antioxidant capacity of strawberry are probably associated with the promotion of ROS scavenging and related antioxidant enzyme activities, and NTLDPE packaging together with refrigeration storage is a promising method for strawberry fruit preservation. © 2016 Society of Chemical Industry.
Zhejiang Key Laboratory for Agro-Food Processing, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Dongdong
D
Li
Zhejiang Key Laboratory for Agro-Food Processing, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Qingyang
Q
Ye
Zhejiang Key Laboratory for Agro-Food Processing, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Lei
L
Jiang
Zhejiang Key Laboratory for Agro-Food Processing, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.|Fuli Institute of Food Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Zisheng
Z
Luo
D000872:Anthocyanins / Q000378:metabolism; D000975:Antioxidants / Q000032:analysis / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000378:metabolism; D001272:Atmosphere; D001713:Biphenyl Compounds / Q000378:metabolism; D002245:Carbon Dioxide; D003080:Cold Temperature; D018857:Food Packaging / Q000379:methods*; D005519:Food Preservation / Q000379:methods; D061353:Food Storage / Q000379:methods; D031985:Fragaria; D005638:Fruit / Q000378:metabolism* / Q000592:standards; D006801:Humans; D006861:Hydrogen Peroxide / Q000378:metabolism; D049329:Nanostructures; D010100:Oxygen; D010636:Phenols / Q000378:metabolism; D010851:Picrates / Q000378:metabolism; D020959:Polyethylene; D012034:Refrigeration; D013481:Superoxides / Q000378:metabolism; D014025:Titanium
D000872:Anthocyanins; D000975:Antioxidants; D001713:Biphenyl Compounds; D010636:Phenols; D010851:Picrates; D013481:Superoxides; D002245:Carbon Dioxide; C009495:titanium dioxide; D020959:Polyethylene; D006861:Hydrogen Peroxide; D014025:Titanium; C004931:1,1-diphenyl-2-picrylhydrazyl; D001205:Ascorbic Acid; D010100:Oxygen
antioxidant; nano-packaging; reactive oxygen species; storage; strawberry