DIATOM LOCOMOTION - AN EXPLANATION
DIATOM LOCOMOTION - AN EXPLANATION
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DOI：
10.1007/bf01254629
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发表时间：
1966-01-01
期刊：
影响因子：
2.9
通讯作者：
HOPKINS, JT
中科院分区：
文献类型：
--
作者：
DRUM, RW;HOPKINS, JT
硅藻运动的研究，在自然环境中和在实验室中，在光学显微镜，电子显微镜下，并与显微电影，表明所有能动的硅藻拥有至少一个管缝管“缝系统”的长度不成比例的运动速度。它们可以同样快地移动，垂直或水平。几乎所有能动的硅藻都必须附着在一个稳定的基质上才能移动。这种粘附是由刺激后活跃的中缝系统中的分泌物引起的。一旦粘附建立，即使在细胞死亡后，它也将继续而无需进一步的能量消耗。分泌物质的来源是晶体体。异丙肾上腺素、麻黄素和苯异丙胺可逆地抑制运动和粘连。plasmodium停止运动。一个或两个活跃的腹中缝系统中的流与运动方向相反。纵向纤维束，类似于黏菌和平滑肌纤维的收缩纤维，发生在所有中缝系统附近。作用于平滑肌的物质，如阿托品、东莨菪碱、咖啡因和罂粟碱，也能阻止硅藻的运动。任何与分泌物接触的颗粒，如果太小而不能作为基质，则被转运。硅藻土、高岭土和滑石粉比光滑的玻璃表面更适合观察运动的硅藻。
Diatom locomotion studies, in the natural environment and in the laboratory, under the light microscope, electron microscope, and with microcinematography, showed that all motile diatoms possess at least one tube-slit-tube "raphe system" whose length is not proportional to the velocity of movement. They can move equally fast, vertically or horizontally. Nearly all motile diatoms must adhere to a stable substratum before locomotion is possible. This adhesion comes about by secretion in an active raphe system after a stimulus. Once adhesion is established, it will continue without further energy expenditure, even after cell death. A source of secretion material is crystalloid bodies. Locomotion and adhesion are reversibly inhibited by isoprenylline, ephedrine, and aphetamine. Plasmolysis stops locomotion. Streaming in one or both active ventral raphe systems is directed opposite to locomotion. Longitudinal fibrillar bundles, similar to contractile fibrils of slime molds and smooth muscle fibrils, occur adjacent to all raphe systems. Substances acting on smooth muscles, for example, atropine, hyoscine, caffeine, and papaverine, also stop retard diatom locomotion. Any particles contacted by the secretion material and too small for serving as a substratum, are transported. Diatomaceous earth, kaolin, and talcum powder are more suitable substrata for observing motile diatoms than smooth glass surfaces.