title: Effects of high concentrations of inorganic salts on swarming ability in fluorescent pseudomonas strains.
abstract: We did tests using swarm plates, to examine the effects of various salts and their concentrations on the chemotaxis of fluorescent Pseudomonas strains. As a result, we found that the swarming ability of the Pseudomonas strains was inhibited by high concentrations of Ca2+. The growth of the strains was not affected at the high concentration of Ca2+, but the cells grown in swarm agar under the condition were extended in the filaments. Most of the cells had reached 10 microm to 40 microm in length. Such cell elongation was not observed with salts other than calcium salts. A significant correlation between the cell elongation and the decrease of swarming ability by the high concentration of Ca2+ was observed.
authors.affiliation: Laboratory of Soil Microbiology, Department of Plant Resources, Faculty of Agriculture, Kyushu University, Fukuoka, Japan. msakai@agr.kyushu-u.ac.jp
authors.forename: Masao
authors.initials: M
authors.lastname: Sakai
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Futamata
authors.forename: Shinjiro
authors.initials: S
authors.lastname: Kanazawa
mesh_terms: D000362:Agar; D002118:Calcium / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D002633:Chemotaxis / Q000187:drug effects*; D011549:Pseudomonas / Q000145:classification / Q000166:cytology / Q000187:drug effects* / Q000502:physiology*; D012492:Salts / Q000494:pharmacology*; D013050:Spectrometry, Fluorescence
chemical_list: D012492:Salts; D000362:Agar; D002118:Calcium