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Investigation of DRA and non-DRA in locust compound eye on the phototactic response of locust
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作者 Qihang Liu Minghao Liu +3 位作者 Bo Yang Pingchuan Zhang Jinxin Cui Huiyuan Zhao 《International Journal of Agricultural and Biological Engineering》 SCIE 2024年第5期81-87,共7页
New approaches are required to prevent the plagues of locusts that threaten crop security in many areas of the world. One such approach is to exploit the phototactic response of locusts, enabling their aggregation and... New approaches are required to prevent the plagues of locusts that threaten crop security in many areas of the world. One such approach is to exploit the phototactic response of locusts, enabling their aggregation and effective removal from agricultural sites. This study examined the effect of the dorsal rim area (DRA) of the locust compound eye on the phototactic response of locusts to spectral light. Locusts with intact DRA showed increased phototactic responses to blue, green or orange light but decreased responses to UV and violet light, whereas locusts with blacked-out DRA (non-DRA vision) showed the strongest phototactic responses to orange followed by violet light. The combined results revealed that phototactic push-pull effect triggered by responses of DRA versus non-DRA vision was strongest in response to violet light. Compound vision in the locust is the result of the synergism between DRA versus non-DRA vision, causing a push-pull phototactic effect that is most stimulated by exposure to violet light, with light intensity enhancing this effect. These results provide theoretical support for the induction of phototaxis and polarotaxis in response to light in locusts, which could be useful for the development of light-based control systems in the field. 展开更多
关键词 Locusta migratoria DRA vision non-dra vision phototactic response function effect
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Influences of DRA and non-DRA vision on the visual responses of locusts stimulated by linearly polarized and unpolarized lights 被引量:1
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作者 Shengguang Zou Tao Liu +2 位作者 Yicheng Ma Pingchuan Zhang Qihang Liu 《International Journal of Agricultural and Biological Engineering》 SCIE 2023年第3期15-22,共8页
Locust and grasshopper plagues pose a serious threat to crop production in many areas worldwide.However,there is a lack of effective,quick-acting methods to control such outbreaks.Methods exploiting the phototactic re... Locust and grasshopper plagues pose a serious threat to crop production in many areas worldwide.However,there is a lack of effective,quick-acting methods to control such outbreaks.Methods exploiting the phototactic response of these insects are receiving increasing attention.The current study investigated the effect of linearly polarized and unpolarized light on locust phototactic and polarotactic responses,in particular the function of their dorsal rim area(DRA)and non-DRA visual fields.The results showed that the polarotactic function weight of DRA vision was stimulated by linearly polarized ultraviolet(UV)and violet light,the phototactic function weight was induced by blue,green,and orange light,and under linearly polarized light,the functional effect of DRA vision was strongest in response to linearly polarized violet light.Moreover,the locust visual response effect was related to spectral light attributes,with the linear polarization effect intensifying in response to the short-range vision sensitivity of non-DRA visual fields,whereas DRA vision regulated the short-range sensitivity of compound eye vision.When illumination increased,the synergistic enhancement effects of linearly polarized ultraviolet and violet light were significant,whereas the visual sensitivity was restricted significantly by linearly polarized blue,green,or orange light.Thus,non-DRA vision determined,while DRA vision enhanced,the phototactic response sensitivity,whereas,in linearly polarized UV or violet light,non-DRA vision determined,while DRA vision enhanced,the visual trend and polarotaxic aggregation sensitivity,with opposite effects in linearly polarized blue,green,or orange light.When illumination increased,there was a driving effect caused by linearly polarized violet light on non-DRA vision,whereas at short-wave lengths,the control effect induced by linearly polarized orange light was optimal;however,the photo-induced effect of linearly polarized violet light and the visual distance control effect of linearly polarized orange light were optimal.These results provide theoretical support for the photo-induced mechanism of the locust visual response effect and for the development of linearly polarized light sources for the environmentally friendly prevention and control of locust populations. 展开更多
关键词 Locusta migratoria linearly polarized light spectral light visual response DRA and non-dra vision
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中国汉族人群HLA-DRA基因rs7194位点多态性与非梗阻性无精症易感性的关联性分析 被引量:7
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作者 宋平平 邹沙沙 +3 位作者 杨娟娟 师咏勇 杜艳芝 胡洪亮 《上海交通大学学报(医学版)》 CAS CSCD 北大核心 2016年第1期65-69,共5页
目的探讨中国汉族人群HLA-DRA基因rs7194位点多态性与非梗阻性无精症(NOA)遗传易感性的关系。方法采用PCR产物直接测序的方法对275例NOA患者(病例组)和221例健康对照(对照组)进行基因分型,比较两组基因型和等位基因分布频率的差异。采用... 目的探讨中国汉族人群HLA-DRA基因rs7194位点多态性与非梗阻性无精症(NOA)遗传易感性的关系。方法采用PCR产物直接测序的方法对275例NOA患者(病例组)和221例健康对照(对照组)进行基因分型,比较两组基因型和等位基因分布频率的差异。采用logistic回归分析方法探讨NOA的易感基因型,并采用meta分析方法进一步验证rs7194位点多态性与NOA疾病是否相关。结果 rs7194位点的基因型频率和等位基因频率在病例组与对照组之间分布的差异均有统计学意义(P=0.003,P=0.001)。Logistic回归结果显示,相比于A/A基因型,A/G基因型和G/G基因型与NOA的患病风险增加相关(OR=1.837,P=0.002;OR=1.942,P=0.048)。Meta分析结果也表明HLA-DRA基因rs7194位点多态性与NOA相关。结论 HLA-DRA基因rs7194位点的多态性与中国汉族人群NOA易感性有关;携带G等位基因且为A/G或G/G基因型患NOA的倾向性增大,可能是患NOA的风险因素之一。 展开更多
关键词 非梗阻性无精症 单核苷酸多态性 HLA-DRA基因
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