Negative effect of alkylresorcinols on motility of rhizobacteria Azospirillum brasilense |
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| Authors: | A V Shelud’ko A V Tugarova A V Il’chukova O E Varshalomidze L P Antonyuk G I El’-Registan E I Katsy |
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| Institution: | 1. Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Saratov, Russia
2. Winogradsky Institute of Microbiology, Russian Academy of Sciences, Moscow, Russia
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| Abstract: | In liquid media, rhizobacteria Azospirillum brasilense are motile by means of a polar flagellum and in semisolid media, also by means of additionally synthesized lateral flagella. In the presence of 4-n-hexylre-sorcinol (0.04–0.10 mM), the swimming rate of A. brasilense Sp245 decreased significantly. At the concentrations over 0.10 mM, motility was completely suppressed. The presence of 4-n-hexylresorcinol in liquid medium also had a negative effect on motility of the cells of Sp245 and other A. brasilense strains (Sp7, Cd, and SR75). The concentrations of 5-methylresorcinol which negatively affected the rate of bacterial spreading in semisolid media were an order of magnitude higher than those of 4-n-hexylresorcinol. Alkylresorcinols, which belong to alkylhydroxybenzene autoregulators, probably affect the cellular mechanisms (systems) responsible for flagella rotation in azospirilla. |
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