Ca^(2+)对罗非鱼嗅电图的影响  

Effects of Ca^(2+) on EOG response of Tilapia sp.

作　　者：陈荣[1] 柴敏娟[2] 

机构地区：[1]厦门大学环境科学研究中心,厦门361005 [2]厦门大学海洋系,厦门361005

出　　处：《台湾海峡》2000年第3期364-366,共3页Journal of Oceanography In Taiwan Strait

基　　金：国家自然科学基金!资助项目(39770102号)

摘　　要：将 4种不同浓度的Ca2 +溶液灌注罗非鱼嗅上皮 ,观测其对罗非鱼嗅电图 (electroolfactogram ,简称EOG)电位幅值的影响 ,结果表明 :Ca2 +对罗非鱼EOG具双重效应。在一定浓度范围 ( 1～ 4mmol/dm3 )内 ,随着Ca2 +浓度的增大 ,Ca2 +对EOG的效应由抑制逐渐转向促进 ,表现为反应的增大与Ca2 +浓度的提高呈正相关。但当Ca2 +浓度进一步提高到 8mmol/dm3 时 ,EOG反应减小 ,呈现抑制效应。本文探讨了Ca2 +影响EOG的可能机制。Four different concentrations of Ca 2+ solutions were perfused the olfactory epithelium of Tilapia sp., and the changes of the EOG responses were observed. The result showed that there were dual effect of Ca 2+ on the electro olfactogram(EOG) of the fish. Within a certain range of Ca 2+ concentration (1～4mmol/dm 3), the EOG effect of Ca 2+ was changed from inhibition to enhancement when the concentration increased, indicating that the enhancement of EOG amplitude was positively ralated to the increasing of Ca 2+ concentration. But when Ca 2+ concentration was increased to 8mmol/dm 3, the EOG response decreased and it appeared as inhibitory effect.

关 键 词：罗非鱼 EOG 嗅电图 钙离子 实验 浓度 嗅觉机制 

分 类 号：Q434[生物学—生理学] Q959.483