Changes in motility of the rhizobacterium Azospirillum brasilense in the presence of plant lectins.
The plant-beneficial bacterium Azospirillum brasilense can swim in liquids and swarm or migrate with the formation of microcolonies in soft media. To get closer to understanding the influence of natural environments on A. brasilense motility, we studied the individual and social movement of the bacterium in the presence of various plant lectins. The lectins with specificity for N-acetyl-beta-d-glucosamine oligomers (wheat germ, Solanum tuberosum and Ulex europeus agglutinins) decreased A. brasilense swimming speed and induced the formation of branched-granular colonies instead of the swarming rings. These effects seemed to be a consequence of specific interactions between the agglutinins and the lectin-binding polymers present in the A. brasilense cell envelope. Concanavalin A (with an affinity for terminal alpha-d-mannosyl and alpha-d-glucosyl residues) and Phaseolus vulgaris phytohemagglutinin P (with unknown specificity) almost did not affect the motility of A. brasilense.
Schelud'ko
Andrei V
AV
Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Saratov, Russia. shel71@ibppm.sgu.ru
Makrushin
Kirill V
KV
Tugarova
Anna V
AV
Krestinenko
Vyacheslav A
VA
Panasenko
Valery I
VI
Antonyuk
Lyudmila P
LP
Katsy
Elena I
EI
D015806:Azospirillum brasilense / Q000187:drug effects / Q000502:physiology*; D002633:Chemotaxis / Q000187:drug effects*; D037121:Plant Lectins / Q000494:pharmacology*
D037121:Plant Lectins