Motility and gravitactic orientation of the flagellate,Euglena gracilis, impaired by artificial and solar UV-B radiation
Motility and gravitactic orientation of the flagellate,Euglena gracilis, impaired by artificial and solar UV-B radiation
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人工和太阳 UV-B 辐射损害的鞭毛虫（细小裸藻）的运动性和重力方向
DOI：
10.1007/bf02092116
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发表时间：
1990
影响因子：
2.6
通讯作者：
Shi
中科院分区：
文献类型：
--
作者：
D. Häder;Shi
通过实时图像分析系统确定了紫外线辐射对淡水鞭毛虫（Euglena gracilis）重心定向的影响。在温控生长室中采用人工紫外线辐射和太阳辐射。重力柱状图显示，随着暴露时间的增加，定向程度降低；这可以使用瑞利检验和上象限求和来量化。人工紫外线辐射对方向的影响比太阳辐射强得多，可能是因为辐射源发出的 300 nm 以下的注量率高于太阳辐射中的注量率。单色紫外线辐射对运动的影响已经确定，并计算了作用谱。
The effects of ultraviolet radiation on the gravitactic orientation of the freshwater flagellate,Euglena gracilis, were determined by a real time image analysis system. Both artificial UV radiation and solar radiation in a temperature-controlled growth chamber were employed. Histograms of gravitaxis showed that the degree of orientation decreased with increasing exposure time; this can be quantified using the Rayleigh test and upper quadrant summation. The effects of artificial UV radiation on the orientation are considerably stronger than those of solar radiation, probably because the radiation source emits higher fluence rates below 300 nm than found in solar radiation. The effects of monochromatic ultraviolet radiation on motility have been determined, and an action spectrum has been calculated.