海带对褐藻酸降解菌的抗性与其抗氧化能力的相关性分析

采用生物化学的方法测试 2个品系的海带 (Laminariajaponica)对褐藻酸降解菌抗性的差异性 ,并对其抗氧化能力进行研究 ,旨为海带烂病的防治提供生物学基础依据。结果表明 ,1)海带荣城 1号对褐藻酸降解菌的抗性远高于海带 90 1;2 )海带荣城 1号细胞内 2种抗氧化酶 -超氧化物歧化酶 (SOD)和过氧化物酶 (POD)的活性明显高于海带 90 1;而另一种抗氧化酶—过氧化氢酶 (CAT)的活性与海带 90 1相比没有明显的差别 ;3 )海带荣城 1号的脂溶性抗氧化能力同样明显高于海带 90 1。说明海带的抗氧化能力与其对褐藻酸降解菌的抗性有一定的相关性。

Relationship between resistance against alginic-acid-decomposing bacteria and antioxidative activity in Laminaria japonica

Using biochemistry methods, two strains of seaweed Laminaria japonica were analyzed. The strains named L. japonica No.1 and L. japonica 901 (briefly No.1 and No.901), respectively, with body length 1.2 1.5 m . The results show that the resistance against alginic acid decomposing bacteria in No.1 is much higher than that in No.901, and the activity of superoxide dismutase (SOD) and peroxidase (POD) in No.1 is significantly higher than that in No.901, while the activity catalase (CAT) does not show any obvious difference between No.1 and No.901. Meanwhile, the lipid soluble antioxidative activity in No.1 is also higher than that in No.901. All the results imply that there exists a close relationship between infection resistance and antioxidative activity in L. japonica. The purpose of this study is to research the biological basis for control of seaweed rot diseases.