High carbon dioxide and low oxygen storage effects on reactive oxygen species metabolism in Pleurotus eryngii
2013
Li, Pengxia | Zhang, Xuan | Hu, Huali | Sun, Ya | Wang, Yuning | Zhao, Yancun
This study addressed the influence of high carbon dioxide and low oxygen levels on Pleurotus eryngii samples, stored at 20–25°C and 90–95% RH for 5 d. Evaluations of sensory characteristics, malondialdehyde (MDA) content, superoxide anion (O2−) production rate and the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and cytochrome c oxidase (CCO) were made in the mushrooms in response to high carbon dioxide and low oxygen treatments. The results showed that 2% O2+30% CO2 significantly prolonged mushroom shelf-life when compared to the control. The 2% O2+30% CO2 mixture was better suited to maintaining mushroom sensory characteristics and delaying the MDA increase and O2− production rate during storage. The activities of SOD, POD, and CAT in 2% O2+30% CO2-treated mushrooms were significantly higher than those of the control. However, the CCO activity was not affected by the atmospheric treatment (2% O2+30% CO2). These results indicated that the 2% O2+30% CO2 treatment could alleviate lipid peroxidation and enhance antioxidant enzyme activities, but it exerted little influence on the CCO activity of Pleurotus eryngii.
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