• Login
    View Item 
    •   Repository
    • Journal Articles
    • Articles: Department of Biological Sciences
    • View Item
    •   Repository
    • Journal Articles
    • Articles: Department of Biological Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Phylogenetic relationship and divergence among planktonic strains of Arthrospira (Oscillatoriales, Cyanobacteria) of African, Asian and American origin deduced by 16S–23S ITS and phycocyanin operon sequences

    Thumbnail
    View/Open
    Abstract (15.18Kb)
    Date
    2010-07
    Author
    Dadheech, Pawan K.
    Ballot, A.
    Casper, P.
    Kotut, Kiplagat
    Novelo, E.
    Lemma, B.
    Proschold, T.
    Krienitz, L.
    Metadata
    Show full item record
    Abstract
    Arthrospira comprises multicellular, cylindrical, usually screwlike coiled trichomes and is cultivated commercially. In this study, 33 new strains of Arthrospira isolated from plankton samples collected in Mexico, East Africa and India were investigated and compared with 53 strains or samples of earlier considerations. The study included observations of morphological features and molecular phylogenetic analyses on the basis of nucleotide sequences of internal transcribed spacer (ITS) between 16S rRNA and 23S rRNA genes and partial sequences of beta and alpha subunits including intergenic spacer (cpcBA-IGS) of phycocyanin operon. Morphological traits of Arthrospira such as trichome width, type of coiling and apical cell were not always consistent in culture conditions. It was revealed that Arthrospira phylogeny on the basis of cpcBA-IGS locus was broadly comparable with the ITS region as both phylogenetic trees derived from nucleotide sequences could be divided into two main clusters. Cluster I comprised sequences from American strains mainly, whereas cluster II contained the sequences of the strains originating from Africa and Asia chiefly. Both genetic regions of the strains investigated in the present study coincidently showed a significant sequence divergence among Arthrospira strains from East Africa, India and Mexico indicating possible distinct evolutionary lineages.
    URI
    http://hdl.handle.net/123456789/228
    Collections
    • Articles: Department of Biological Sciences [285]

    University of Embu©
    Contact Us |
    Designed by 
    Atmire NV
     

     

    Browse

    All of RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    University of Embu©
    Contact Us |
    Designed by 
    Atmire NV