氨氮胁迫对马氏珠母贝免疫活性的影响Effects of Ammonia-N Stress on Immune Activity of Pinctada martensii ( Dunker )
栗志民,申玉春,王淑敏,李嘉威
摘要(Abstract):
在实验室条件下探讨氨氮胁迫对马氏珠母贝(Pinctada martensii)血细胞密度、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、溶菌酶(LSZ)、酸性磷酸酶(ACP)活性的影响。结果表明:1)不同浓度氨氮(1.25~40 mg/L)胁迫3 d后,马氏珠母贝血细胞密度随氨氮浓度的增加呈下降趋势,当氨氮浓度超过5 mg/L时血细胞密度较对照组明显下降,差异极显著(P<0.01);2)血清SOD活性随实验氨氮浓度(1.25~40 mg/L)的增加而明显下降,在较低氨氮浓度(1.25~5 mg/L)时,SOD活性高于对照组,氨氮浓度超过10 mg/L时,SOD活性低于对照组,各实验组SOD活性与对照组均存在极显著差异(P<0.01);3)当氨氮浓度为1.25~20 mg/L时,马氏珠母贝血清CAT活性随氨氮浓度的增加而升高,除氨氮1.25 mg/L组外,其余各实验组血清CAT活性较对照组极显著升高(P<0.01),当氨氮浓度为30~40 mg/L时,血清CAT活性呈急剧下降趋势,且低于对照组(P<0.01);4)马氏珠母贝血清LSZ活性随实验氨氮浓度的增加而降低,当氨氮浓度为10 mg/L以下时,血清LSZ活性高于对照组,当氨氮浓度为20 mg/L以上时,血清LSZ活性较对照组极显著降低(P<0.01);5)氨氮浓度为1.25~10 mg/L时,马氏珠母贝血清ACP活性随氨氮浓度的增加而升高,且高于对照组(P<0.01),当氨氮浓度超高20 mg/L时,马氏珠母贝血清ACP活性随氨氮浓度的增加急剧降低,且低于对照组(P<0.01)。
关键词(KeyWords): 马氏珠母贝;氨氮胁迫;免疫活性:血细胞;超氧化物歧化酶;过氧化氢酶;溶菌酶;酸性磷酸酶
基金项目(Foundation): 广东省科技计划项目(2007A032600004)
作者(Author): 栗志民,申玉春,王淑敏,李嘉威
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