Effect of Protocatechuic Acid-Grafted-Chitosan Coating on the Postharvest Quality of Pleurotus eryngii.
Protocatechuic acid-grafted-chitosan (PA-g-CS) solution with antioxidant activity was developed as a novel edible coating material for Pleurotus eryngii postharvest storage. The effect of PA-g-CS coating on the postharvest quality of P. eryngii was investigated by determination of various physicochemical parameters and enzyme activities. Results showed that the antioxidant capacity and viscosity of PA-g-CS solutions were closely related to the grafting degree and were much higher than that of chitosan (CS) solution. At the end of 15 days of storage, serious mushroom browning was observed in the control and CS coating groups. By contrast, PA-g-CS coating groups with medium and high grafting degrees maintained better physical appearance. Among all of the treatment groups, P. eryngii in PA-g-CS III coating group exhibited the highest firmness and the lowest weight loss, browning degree, respiration rate, malondialdehyde content, electrolyte leakage rate, superoxide anion production rate, and hydrogen peroxide content. Moreover, P. eryngii in PA-g-CS III coating group maintained relatively higher antioxidant enzyme activities but lower polyphenol oxidase activity than other treatment groups. Therefore, PA-g-CS III is a promising preservation agent for P. eryngii.
College of Food Science and Engineering, Yangzhou University , Yangzhou 225127, Jiangsu, China.
Jun
J
Liu
College of Food Science and Engineering, Yangzhou University , Yangzhou 225127, Jiangsu, China.
Chen-Guang
CG
Meng
College of Food Science and Engineering, Yangzhou University , Yangzhou 225127, Jiangsu, China.
Xing-Chi
XC
Wang
College of Food Science and Engineering, Yangzhou University , Yangzhou 225127, Jiangsu, China.
Yao
Y
Chen
College of Food Science and Engineering, Yangzhou University , Yangzhou 225127, Jiangsu, China.
Juan
J
Kan
College of Food Science and Engineering, Yangzhou University , Yangzhou 225127, Jiangsu, China.
Chang-Hai
CH
Jin
D000363:Agaricales; D000975:Antioxidants / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D005519:Food Preservation / Q000379:methods; D063427:Food Quality; D061353:Food Storage; D062385:Hydroxybenzoates / Q000737:chemistry*; D008315:Malondialdehyde / Q000378:metabolism; D020076:Pleurotus; D014783:Viscosity
D000975:Antioxidants; D062385:Hydroxybenzoates; C009091:protocatechuic acid; D008315:Malondialdehyde; D048271:Chitosan
Pleurotus eryngii; chitosan; grafted; postharvest quality; protocatechuic acid