Abstract
In order to study the mechanism of micro-vacuum storage delaying Pleurotus ostreatus senescence, the modified atmosphere package storage was used as a control group to explore the delaying senescence mechanism of Pleurotus ostreatus under micro-vacuum storage. The activity of endogenesis antioxidative enzymes (SOD, CAT, POD), PPO, the regression relationship of superoxide anion (O-2•), H2O2, MDA content and relative leakage rate were studied. The results showed that micro-vacuum storage could significantly improve the activities of SOD, CAT and POD, decrease the accumulation of O-2• and H2O2, delay the increasing of MDA content and relative leakage rate, decline the activities of PPO (p<0.05). It showed that the micro vacuum storage can reduce the accumulation of free radicals, keep cell membrane structure and function, inhibit browning and change of quality through improving the endogenous antioxidant enzymes activity to delay senescence process of Pleurotus ostreatus.
Highlights
Pleurotus ostreatus called Pinggu mushroom in China, is widely cultivated in China, Japan and Thailand (Xiao et al, 2011)
Effects of MV and Modified Atmosphere Packaging (MAP) storage on Superoxide Dismutase (SOD), CAT and POD of mushroom: Figure 2A showed the effect of MV and MAP storage on SOD activity
Dismutation of mushrooms had significant difference throughout storage time (p
Summary
Pleurotus ostreatus called Pinggu mushroom in China, is widely cultivated in China, Japan and Thailand (Xiao et al, 2011) It is a delicate variety of mushroom, requiring a growing temperature range between 5 and 22°C, depending on the cultivar, as well as good ventilation and high relative humidity (Villaescusa and Gil, 2003). Lowering the temperature of mushrooms reduces respiration and transpiration, delaying senescence, preventing wilting and shriveling and extending shelf life (Burton and Twyning, 1989; BeitHalachmy and Mannheim, 1992). It is a highly perishable mushroom with a normal shelf life of 1 to 3 days at ambient temperature during marketing (Xiao et al, 2011). Effective control of physiological processes to prolong the post-harvest storage time of the Pleurotus ostreatus is an important area of research
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