光强度对大草蛉成虫感光性和趋光性行为的影响  

Effect of light intensity on the photosensitivity and phototaxis behaviour of Chrysopa pallens Ramber(Neuroptera:Chrysopidae)

作　　者：张海强[1] 闫海霞[1] 刘顺[1] 张乃瑾 魏国树[1] 

机构地区：[1]河北农业大学植物保护学院/河北省农作物病虫害生防工程中心,河北保定071001 [2]河北省石津灌区管理局,石家庄050051

出　　处：《昆虫学报》2009年第4期461-464,共4页Acta Entomologica Sinica

基　　金：河北省博士基金;河北省自然科学基金项目(C2004000341,C2008000272);河北省强势特色学科项目

摘　　要：运用视网膜电位（electroretinogram，ERG）技术和行为学方法研究了大草蛉Chrysopapallen3Ramber成虫的光强度反应。结果显示：（1）白光（Log I=4．5～0．0）可引发2h暗适应的大草蛉复眼的电位反应。随光强增强其ERG值呈近线性增大，最强时未出现高端平台，表明该光强范围内其感光性基本一致，且可感受更强的光；（2）一定光强度（Log I=4．0）以上的白光可引发大草蛉较明显的趋光性行为，该行为具有光强域值特征和较明显的光强度依赖性。弱光时（Log I=4．5）无趋光性行为，随光强增大趋光性反应率增大，光较弱（LogI=4．5～1．5）时增大缓慢，较强（LogI=1．5—0．0）时迅速增大，至最强（LogI=0．0）时最大（37．1％），呈一近“J”型式样。避光行为无或很低，且无规律，最大值仅为4．5％。这些结果表明：光强度是大草蛉感光性与趋光性行为的重要决定因素，强光时感光性电位反应与趋光性行为反应基本一致，弱光时则不同，暗示了光强度信息在感光性和趋光性间作用的有条件性和复杂性。The responses of Chrysopa pallens Ramber to light stimuli with different intensities were investigated by means of electroretinogram （ERG） technique and behaviour measurement. The results were as follows： （ 1 ） The white light with given intensity （Log I =4.5 -0. 0） could evoke the ERG responses of the compound eyes of C. pallens after 2 h dark-adaption. A linear increase in ERG value occurred with the increase of the light intensity, and no plateau end was seen in the strongest intensity, which revealed that C. pallens owned almost the same photosensitivity within the test range of light intensity and was able to perceive stronger light. （2） Obvious phototactic responses in behavior upon given light stimuli that were stronger than Log I = 4.0 were also observed, and the stronger the light intensity, the higher the percentage of behaviour response, especially in the range of stronger intensity （ Log I = 1.5 - 0.0）. However, their photophobism was rather lower or irregular, with the maximum of 4.5%. It is so concluded that both the perception to light and subsequently phototaxis behavior of C. pallens depend on the light intensity obviously, there is no visible photophobism response in any case, and the response of primal receptor cell potential is accordant with the phototactic behavior in a certain range of light intensity, indicating that light intensity plays a subtle role during the light perception and succeeding phototaxis.

关 键 词：大草蛉 光强度 白光 视网膜电位 趋光性行为 

分 类 号：Q967[生物学—昆虫学]