Mitchell J G, Martinez-Alonso M, Lalucat J, Esteve I, Brown S
Department of Genetics and Microbiology, Autonomous University of Barcelona, Bellaterra, Spain.
J Bacteriol. 1991 Feb;173(3):997-1003. doi: 10.1128/jb.173.3.997-1003.1991.
The velocity, run time, path curvature, and reorientation angle of Chromatium minus were measured as a function of light intensity, temperature, viscosity, osmotic pressure, and hydrogen sulfide concentration. C. minus changed both velocity and run time. Velocity decreased with increasing light intensity in sulfide-depleted cultures and increased in sulfide-replete cultures. The addition of sulfide to cultures grown at low light intensity (10 microeinsteins m-2 s-1) caused mean run times to increase from 10.5 to 20.6 s. The addition of sulfide to cultures grown at high light intensity (100 microeinsteins m-2 s-1) caused mean run times to decrease from 15.3 to 7.7 s. These changes were maintained for up to an hour and indicate that at least some members of the family Chromatiaceae simultaneously modulate velocity and turning frequency for extended periods as part of normal taxis.
测量了极小色菌（Chromatium minus）的速度、运行时间、路径曲率和重新定向角度，这些都是光强度、温度、粘度、渗透压和硫化氢浓度的函数。极小色菌改变了速度和运行时间。在缺乏硫化物的培养物中，速度随着光强度的增加而降低，而在富含硫化物的培养物中速度增加。向在低光强度（10微爱因斯坦·米-2·秒-1）下生长的培养物中添加硫化物，导致平均运行时间从10.5秒增加到20.6秒。向在高光强度（100微爱因斯坦·米-2·秒-1）下生长的培养物中添加硫化物，导致平均运行时间从15.3秒减少到7.7秒。这些变化持续了长达一小时，表明至少一些着色菌科成员作为正常趋性的一部分，会在较长时间内同时调节速度和转向频率。
