当前位置: 首页 > 文章 > Cu~(2+)胁迫对克氏原螯虾(Procambarus clarkii)酚氧化酶原激活系统活性的影响 农业环境科学学报 2016,35 (05) 865-870
Position: Home > Articles > Effect of Cu~(2+) stress on activity of prophenoloxidase activating system in Procambarus clarkii Journal of Agro-Environment Science 2016,35 (05) 865-870

Cu~(2+)胁迫对克氏原螯虾(Procambarus clarkii)酚氧化酶原激活系统活性的影响

作  者:
张娟;魏克强;赵婷
单  位:
山西大学生命科学学院
关键词:
克氏原螯虾;血蓝蛋白;酚氧化酶;丝氨酸蛋白酶;Cu~(2+)
摘  要:
重金属铜是养殖水体的主要污染物,严重影响甲壳动物的免疫机能。以淡水克氏原螯虾(Procambarus clarkii)为实验对象,以亚致死浓度(1.0、3.0、5.0、10.0 mg·L~(-1),96-h LC50=22.14 mg·L~(-1))的Cu~(2+)为胁迫因子,采用静态水质接触染毒法,通过分析血细胞内酚氧化酶原(pro PO)、丝氨酸蛋白酶(SP)以及血淋巴中酚氧化酶(PO)、血蓝蛋白(Hc)和血细胞数(THC)的水平,探讨了Cu~(2+)胁迫对酚氧化酶原激活系统(pro PO-AS)活性的影响。结果表明,与未染毒的对照组相比,Cu~(2+)显著抑制proPO、PO的活性以及THC、Hc的含量(P<0.05);但仅在10.0 mg·L~(-1)Cu~(2+)浓度下,SP的活性显著降低(P<0.05)。研究结果提示,水体Cu~(2+)对螯虾具有免疫毒性效应,氧化应激导致的血细胞数、血蓝蛋白含量、丝氨酸蛋白酶活性抑制可能是影响pro PO-AS活性的主要机制之一。
译  名:
Effect of Cu~(2+) stress on activity of prophenoloxidase activating system in Procambarus clarkii
作  者:
ZHANG Juan;WEI Ke-qiang;ZHAO Ting;School of Life Science,Shanxi University;
关键词:
Procambarus clarkii;;hemocyanin;;phenoloxidase;;serine protease;;Cu~(2+)
摘  要:
Copper(Cu)is one of ubiquitous contaminants in the aquatic environment,causing potential immunotoxicity to crustacean.In the present study,the effect of Cu~(2+)stress on prophenoloxidase activating system(pro PO-AS),the most important component of innate defense,was evaluated in freshwater crayfish Procambarus clarkii.After 96 h exposure to sub-lethal concentrations(0,1.0,3.0,5.0 mg·L~(-1)and 10.0mg·L~(-1))of Cu~(2+),the activities of prophenoloxidase(pro PO)and serine protease(SP)in hemocyte lysate supernatant(HLS)and the levels of total haemocyte count(THC),phenoloxidase(PO),and hemocyanin(Hc)in haemolymph were determined.Results indicated that there was a significant reduction(P <0.05)in crayfish immunocompetence,including pro PO,PO,THC,and Hc,at higher Cu~(2+) concentrations.The SP activity was obviously inhibited only at 10.0 mg·L~(-1)Cu~(2+).The aqueous Cu~(2+) may play an important role in regulating pro PO-AS by inhibiting THC,Hc,and SP.The immune factors,such as THC,pro PO,and PO,could be considered as sensitive biomarkers of immunotoxicity in crayfish species.

相似文章

计量
文章访问数: 13
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊