摘要
对高温和H2 O2 应激条件下产生活性酵母细胞衍生物 (LiveYeastCellDerivative ,简称LYCD)进行了研究。结果表明 :低剂量的预处理 ( 37℃和 0 2mmol LH2 O2 )能够增加细胞内谷胱甘肽 (GSH)含量 ,提高超氧化物歧化酶 (SOD)、过氧化氢酶 (CAT)活性。两种预处理均可以诱导对致死浓度H2 O2 的抗性。通过 37℃和 0 2mmol LH2 O2 处理酵母细胞后 ,提取LYCD并添加到酵母细胞培养液中 ,发现细胞在致死浓度H2 O2 作用下的存活率明显提高 ,说明温度和H2 O2 刺激酵母细胞形成的LYCD对细胞氧化具有抵抗作用。
This study was based on live yeast cell derivative (LYCD), which was produced by live yeast cell stressed with high temperature and H 2O 2. The results showed that pretreating of low dose(37℃and 0.2mmol/L H 2O 2) could increase the content of GSH and the activity of SOD and CAT. These pretreatment could induce the resistance to lethal concentration of H 2O 2. LYCD was produced by yeast treated with 37℃ and 0.2mmol/L H 2O 2. And it was found that the survival of yeast treated with lethal concentration of H 2O 2 obviously increased, while LYCD was added in yeast culture. It indicated that LYCD could have resistance to oxidative condition.
出处
《微生物学通报》
CAS
CSCD
北大核心
2004年第5期28-32,共5页
Microbiology China
基金
国家自然科学基金资助项目 (No 2 0 2 0 60 2 5 )~~
