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Quorum sensing in Sinorhizobium meliloti and effect of plant signals on bacterial quorum sensing

Teplitski, Max I
http://rave.ohiolink.edu/etdc/view?acc_num=osu1029777185

Abstract Details

2002, Doctor of Philosophy, Ohio State University, Horticulture and Crop Science.
Bacteria exchange N-acyl homoserine lactone (AHL) to coordinate the behavior of cells. The nitrogen-fixing bacterium Sinorhizobium meliloti was found to produce AHLs with C14-C16 alkanoyl, alkenoyl and 3-oxo-alkenoyl side chains. Strains of S. meliloti also produced AHLs with C6-C10 alkanoyl and 3-oxo-alkanoyl side chains. Exposure of early log phase cells of S. meliloti 1021 to AHLs changed the accumulation of over a hundred polypeptides. These results provide the first global analysis of quorum sensing regulation in S. meliloti. Plant seedlings and cells of alga Chlamydomonas reinhardtii produced substances that mimicked bacterial AHLs in well-characterized reporter strains. This is the first demonstration of AHL signal-mimic compounds in eukaryotes after their discovery in a marine alga, and indicates that plants and algae may have a general ability to disrupt quorum sensing regulation in associated bacteria through secretion of quorum sensing signal mimics.
Wolfgang Bauer (Advisor)
Biology, Microbiology
quorum sensing; sinorhizobium meliloti; rhizobium; acyl homoserine lactone; root mucilage; plant polysaccharide; glycanase; stationary phase; log phase; proteomics; swarming; LuxR; mass spectrometry; Chlamydomonas; secondary products; rhizosphere

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Citations

  • Teplitski, M. I. (2002). Quorum sensing in Sinorhizobium meliloti and effect of plant signals on bacterial quorum sensing [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1029777185

    APA Style (7th edition)

  • Teplitski, Max. Quorum sensing in Sinorhizobium meliloti and effect of plant signals on bacterial quorum sensing. 2002. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1029777185.

    MLA Style (8th edition)

  • Teplitski, Max. "Quorum sensing in Sinorhizobium meliloti and effect of plant signals on bacterial quorum sensing." Doctoral dissertation, Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1029777185

    Chicago Manual of Style (17th edition)

osu1029777185
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© 2002, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.