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chemotaxis

  • Swimming <span class="named-content genus-species" id="named-content-1">Escherichia coli</span> Cells Explore the Environment by Lévy Walk
    Physiology
    Swimming Escherichia coli Cells Explore the Environment by Lévy Walk

    E. coli cells explore the environment in a random walk of alternating runs and tumbles. By tracking the 3D trajectories of E. coli cells in an aqueous environment, we found that their trajectories are superdiffusive, with a power-law shape for the distribution of run lengths, which is...

    Haiyan Huo, Rui He, Rongjing Zhang, Junhua Yuan
  • Spatiotemporal Organization of Chemotaxis Pathways in <span class="named-content genus-species" id="named-content-1">Magnetospirillum gryphiswaldense</span>
    Physiology
    Spatiotemporal Organization of Chemotaxis Pathways in Magnetospirillum gryphiswaldense

    Magnetotactic bacteria (MTB) use the geomagnetic field for navigation in aquatic redox gradients. However, the highly complex signal transduction networks in these environmental microbes are poorly understood. Here, we analyzed the localization of selected chemotaxis proteins to spatially and temporally resolve chemotaxis array localization in Magnetospirillum...

    Daniel Pfeiffer, Julian Herz, Julia Schmiedel, Felix Popp, Dirk Schüler
  • Specific Root Exudate Compounds Sensed by Dedicated Chemoreceptors Shape <span class="named-content genus-species" id="named-content-1">Azospirillum brasilense</span> Chemotaxis in the Rhizosphere
    Plant Microbiology | Spotlight
    Specific Root Exudate Compounds Sensed by Dedicated Chemoreceptors Shape Azospirillum brasilense Chemotaxis in the Rhizosphere

    Plant root exudates play critical roles in shaping rhizosphere microbial communities, and the ability of motile bacteria to respond to these gradients mediates competitive colonization of root surfaces. Root exudates are complex chemical mixtures that are spatially and temporally dynamic. Identifying the exact chemical(s) that mediates the recruitment of soil bacteria to specific regions of the roots is thus challenging. Here, we...

    Lindsey O’Neal, Lam Vo, Gladys Alexandre
  • CheY1 and CheY2 of <span class="named-content genus-species" id="named-content-1">Azorhizobium caulinodans</span> ORS571 Regulate Chemotaxis and Competitive Colonization with the Host Plant
    Plant Microbiology
    CheY1 and CheY2 of Azorhizobium caulinodans ORS571 Regulate Chemotaxis and Competitive Colonization with the Host Plant

    Azorhizobium caulinodans ORS571 is a motile soil bacterium that has the dual capacity to fix nitrogen both under free-living conditions and in symbiosis with Sesbania rostrata, forming nitrogen-fixing root and stem nodules. Bacterial chemotaxis to chemoattractants derived from host roots promotes...

    Wei Liu, Xue Bai, Yan Li, Jun Min, Yachao Kong, Xiaoke Hu
  • Temperature and Nutrient Levels Correspond with Lineage-Specific Microdiversification in the Ubiquitous and Abundant Freshwater Genus <em>Limnohabitans</em>
    Environmental Microbiology | Spotlight
    Temperature and Nutrient Levels Correspond with Lineage-Specific Microdiversification in the Ubiquitous and Abundant Freshwater Genus Limnohabitans

    Limnohabitans is an important bacterial taxonomic group for cycling carbon in freshwater ecosystems worldwide. Here, we examined the genomic diversity of different Limnohabitans lineages. We focused on the LimB lineage of this genus, which is globally distributed and often abundant, and its abundance has shown to be largely invariant to environmental change. Our data show that the LimB lineage is actually comprised of...

    Ruben Props, Vincent J. Denef
  • Chemotaxis of <span class="named-content genus-species" id="named-content-1">Pseudomonas putida</span> F1 to Alcohols Is Mediated by the Carboxylic Acid Receptor McfP
    Physiology
    Chemotaxis of Pseudomonas putida F1 to Alcohols Is Mediated by the Carboxylic Acid Receptor McfP

    Alcohols, released as fermentation products and produced as intermediates in the catabolism of many organic compounds, including hydrocarbons and fatty acids, are common components of the microbial food web in soil and sediments. Although they serve as good carbon and energy sources for many soil bacteria, alcohols have primarily been reported to be repellents rather than attractants for motile bacteria. Little is known about how...

    Xiangsheng Zhang, Jonathan G. Hughes, Gabriel A. Subuyuj, Jayna L. Ditty, Rebecca E. Parales
  • Environmental Microbiology
    Heterologous Expression of Pseudomonas putida Methyl-Accepting Chemotaxis Proteins Yields Escherichia coli Cells Chemotactic to Aromatic Compounds

    Bacterial chemotaxis might be harnessed for the development of rapid biosensors, in which chemical availability is deduced from cell accumulation to chemoattractants over time. Chemotaxis of Escherichia coli has been well studied, but the bacterium is not attracted to chemicals of environmental concern, such as aromatic solvents. We show here that heterologous...

    Clémence Roggo, Estelle Emilie Clerc, Noushin Hadadi, Nicolas Carraro, Roman Stocker, Jan Roelof van der Meer
  • Genetics and Molecular Biology
    A cheZ-Like Gene in Azorhizobium caulinodans Is a Key Gene in the Control of Chemotaxis and Colonization of the Host Plant
    Xiaolin Liu, Wei Liu, Yu Sun, Chunlei Xia, Claudine Elmerich, Zhihong Xie
  • Food Microbiology
    Internalization of Salmonella enterica in Leaves Is Induced by Light and Involves Chemotaxis and Penetration through Open Stomata
    Yulia Kroupitski, Dana Golberg, Eduard Belausov, Riky Pinto, Dvora Swartzberg, David Granot, Shlomo Sela
  • Physiology
    Bacterial Chemotaxis to Atrazine and Related s-Triazines
    Xianxian Liu, Rebecca E. Parales

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