外源添加剂水杨酸对菊花江蓠抗寒性的影响  

Effects of exogenous salicylic acid on the resistance of Gracilaria lichevoides to chilling injury

作　　者：范皖苏[1] 黄鹤忠[1] 徐汗福[1] 何华敏[1] 贾一何[1] 

机构地区：[1]苏州大学基础医学与生物科学学院,苏州大学水产研究所,江苏苏州215123

出　　处：《海洋科学》2011年第2期38-43,共6页Marine Sciences

基　　金：江苏省社会发展资助项目(BS2002016)

摘　　要：通过室内实验生理生态学的方法研究了外源添加剂水杨酸(SA)对菊花江蓠(Gracilaria lichevoides)抗寒性的影响。研究表明,通过添加0.5 mmol/L的SA,可以明显降低(实验组)江蓠的丙二醛(MDA)积累量、电解质渗透率;其脯氨酸含量、特定生长率(RSG)、超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性均明显高于未用SA处理组。在低温(6～8℃)条件下,0.5 mmol/L SA处理组与未处理组及其他SA处理组相比存活时间明显延长,特定生长率(RSG)未出现负增长。表明添加0.5 mmol/L的SA可以明显提高江蓠耐低温胁迫能力。The effect of salicylic acid on the resistance of Gracilaria lichevoides to chilling injury was studied through in vitro physiological experiments.It was found that 0.5 mmol/L SA could reduce the content of MDA（a product of membrane lipid peroxidation） and relative conductivity and enhance the proline content,special growth rate and the activities of SOD,POD,and CAT,significantly.At 6～8℃,the treatment group（0.5 mmol/L SA） could survived longer than the untreated group,and the special growth rate was positive.So,0.5 mmol/L SA can enhance the chilling resistance of G.lichevoides.

关 键 词：菊花江蓠(Gracilaria lichevoides) 低温 水杨酸 抗性 

分 类 号：S963[农业科学—水产养殖]