Browsing Research Articles (Genetics) by Subject "Bacteria"

Browsing Research Articles (Genetics) by Subject "Bacteria"

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  • Biodiversity : so much more than legs and leaves 
    Cowan, Don A.; Rybicki, Edward P.; Tuffin, Marla I.; Valverde, Angel; Wingfield, Michael J. (AOSIS Open Journals, 2013-11)
    Microorganisms inhabit virtually every possible niche on Earth, including those at the outer envelope of survival. However, the focus of most conservation authorities and ecologists is the ‘legs and leaves’ side of biology ...
  • Biogeography of bacterial communities in hot springs : a focus on the actinobacteria 
    Valverde, Angel; Tuffin, Marla I.; Cowan, Don A. (Springer, 2012-07)
    Actinobacteria are ubiquitous in soil, freshwater and marine ecosystems. Although various studies have focused on the microbial ecology of this phylum, data are scant on the ecology of actinobacteria endemic to hot springs. ...
  • Characterization of bacterial communities in lithobionts and soil niches from Victoria Valley, Antarctica 
    Van Goethem, Marc W.; Makhalanyane, Thulani Peter; Valverde, Angel; Cary, Stephen Craig; Cowan, Don A. (Oxford University Press, 2016-04)
    Here we provide the first exploration of microbial diversity from three distinct Victoria Valley edaphic habitats, namely lithobionts (hypoliths, endoliths) and surface soils. Using a combination of terminal restriction ...
  • Contrasting assembly processes in a bacterial metacommunity along a desiccation gradient 
    Valverde, Alexander; Makhalanyane, Thulani Peter; Cowan, Don A. (Frontiers Research Foundation, 2014-12)
    Understanding the relative influence of deterministic and stochastic processes in driving community assembly is a major goal in microbial ecology. Here, we have investigated the influence of these processes on bacterial ...
  • Distinct assembly mechanisms underlie similar biogeographical patterns of rare and abundant bacteria in Tibetan Plateau grassland soils 
    Ji, Mukan; Kong, Weidong; Stegen, James; Yue, Linyan; Wang, Fei; Dong, Xiaobin; Cowan, Don A.; Ferrari, Belinda C. (Wiley, 2020-06)
    Rare biosphere represents the majority of Earth's biodiversity and performs vital ecological functions, yet little is known about its biogeographical patterns and community assembly processes in terrestrial ecosystems. ...
  • Habitat heterogeneity and connectivity shape microbial communities in South American peatlands 
    Oloo, Felix; Valverde, Angel; Quiroga, Maria Victoria; Vikram, Surendra; Cowan, Don A.; Mataloni, Gabriela (Nature Publishing Group, 2016-05-10)
    Bacteria play critical roles in peatland ecosystems. However, very little is known of how habitat heterogeneity affects the structure of the bacterial communities in these ecosystems. Here, we used amplicon sequencing ...
  • The healthy human blood microbiome : fact or fiction? 
    Castillo, Diego J.; Rifkin, Riaan F.; Cowan, Don A.; Potgieter, Marnie (Frontiers Media, 2019-05-08)
    The blood that flows perpetually through our veins and arteries performs numerous functions essential to our survival. Besides distributing oxygen, this vast circulatory system facilitates nutrient transport, deters ...
  • Hypolithic and soil microbial community assembly along an aridity gradient in the Namib Desert 
    Stomeo, Francesca; Valverde, Angel; Pointing, Stephen B.; McKay, Christopher P.; Warren-Rhodes, Kimberley A.; Tuffin, Marla I.; Seely, Mary; Cowan, Don A. (Springer, 2013-02-09)
    The Namib Desert is considered the oldest desert in the world and hyperarid for the last 5 million years. However, the environmental buffering provided by quartz and other translucent rocks supports extensive hypolithic ...
  • LEA proteins and the evolution of the WHy domain 
    Mertens, Jasmin; Aliyu, Habibu; Cowan, Don A. (American Society for Microbiology, 2018-05)
    The LEA family is composed of a diverse collection of multi-domain and multi-functional proteins, found in all three Domains of the Tree of Life, but particularly common in plants. Most members of the family are known to ...
  • Microbial nitrogen cycling in antarctic soils 
    Ortiz, Maximiliano; Bosch, Jason; Coclet, Clement; Johnson, Jenny; Lebre, Pedro H.; Salawu-Rotimi, Adeola; Vikram, Surendra; Makhalanyane, Thulani Peter; Cowan, Don A. (MDPI, 2020-09)
    The Antarctic continent is widely considered to be one of the most hostile biological habitats on Earth. Despite extreme environmental conditions, the ice-free areas of the continent, which constitute some 0.44% of the ...
  • Network-based identification of adaptive pathways in evolved ethanol-tolerant bacterial populations 
    Swings, Toon; Weytjens, Bram; Schalck, Thomas; Bonte, Camille; Verstraeten, Natalie; Michiels, Jan; Marchal, Kathleen (Oxford University Press, 2017-11)
    Efficient production of ethanol for use as a renewable fuel requires organisms with a high level of ethanol tolerance. However, this trait is complex and increased tolerance therefore requires mutations in multiple genes ...
  • Pathogen infection influences a distinct microbial community composition in sorghum RILs 
    Masenya, K.; Thompson, G.D.; Tekere, M.; Makhalanyane, Thulani Peter; Pierneef, Rian Ewald; Rees, D.J.G. (Springer, 2021-06)
    AIMS: The rhizosphere microbiome substantially affects plant health, yet comparatively little is known regarding the foliar community dynamics. Here, we examine the relationship between the microbiota and their response to ...
  • Phages actively challenge niche communities in Antarctic soils 
    Bezuidt, Keoagile Ignatius Oliver; Lebre, Pedro H.; Pierneef, Rian Ewald; Leon-Sobrino, Carlos; Adriaenssens, Evelien M.; Cowan, Don A.; Van de Peer, Yves; Makhalanyane, Thulani Peter (American Society for Microbiology, 2020-05-05)
    By modulating the structure, diversity, and trophic outputs of microbial communities, phages play crucial roles in many biomes. In oligotrophic polar deserts, the effects of katabatic winds, constrained nutrients, and ...
  • Prokaryotic species are sui generis evolutionary units 
    Palmer, Marike; Venter, S.N. (Stephanus Nicolaas); Coetzee, Martin Petrus Albertus; Steenkamp, Emma Theodora (Elsevier, 2019-03)
    Many gene flow barriers associated with genetic isolation during eukaryotic species divergence, are lacking in prokaryotes. In these organisms the processes associated with horizontal gene transfer (HGT) may provide both ...
  • A reservoir of ‘historical’ antibiotic resistance genes in remote pristine Antarctic soils 
    Van Goethem, Marc W.; Pierneef, Rian Ewald; Bezuidt, Keoagile Ignatius Oliver; Van de Peer, Yves; Cowan, Don A.; Makhalanyane, Thulani Peter (BioMed Central, 2018-02-23)
    BACKGROUND : Soil bacteria naturally produce antibiotics as a competitive mechanism, with a concomitant evolution, and exchange by horizontal gene transfer, of a range of antibiotic resistance mechanisms. Surveys of ...