Chemokinetic Motility Responses of the Cyanobacterium Oscillatoria terebriformis.
Oscillatoria terebriformis, a gliding, filamentous, thermophilic cyanobacterium, exhibited an inhibition of gliding motility upon exposure to fructose. The observed response was transient, and the duration of nonmotility was directly proportional to the concentration of fructose. Upon resumption of motility, the rate of motility was also inversely proportional to the concentration of fructose. Sulfide caused a similar response. The effect of sulfide was specific and not due to either anoxia or negative redox potential. Exposure to glucose, acetate, lactate, or mat interstitial water did not elicit any motility response.
Richardson
L L
LL
Department of Biology, University of Oregon, Eugene, Oregon 97403.
Castenholz
R W
RW