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Please use this identifier to cite or link to this item: http://hdl.handle.net/11154/149536

Title: 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
Authors: Dadheech, P.
Ballot, A.
Casper, P.
Kotut, K.
Novelo, E.
Lemma, B.
Proschold, T.
Krienitz, L.
Int Phycological Society
krie@igb-berlin.de
Dadheech, Pawan, Ballot, Andreas, Casper, Peter, Krienitz, Lothar: Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Limnol Stratified Lakes, D-16775 Stechlin, Germany
Dadheech, Pawan K.: Govt Coll, Dept Bot, Ajmer 305001, Rajasthan, India
Kotut, Kiplagat: Kenyatta Univ, Dept Plant & Microbial Sci, Nairobi, Kenya
Novelo, Eberto: Univ Nacl Autonoma Mexico, Dept Comparat Biol, Sch Sci, Coyoacan 04510, DF, Mexico
Lemma, Brook: Univ Addis Ababa, Coll Educ, Dept Biol, Addis Ababa 1110, Ethiopia
Proeschold, Thomas: Scottish Assoc Marine Sci, Dunstaffnage Marine Lab, Dunbeg By Oban PA37 1QA, Argyll, Scotland
Issue Date: 2010
Citation: Dadheech, P; Ballot, A; Casper, P; Kotut, K; Novelo, E; Lemma, B; Proschold, T; Krienitz, L. ( 2010 ). 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. Phycologia, 49(4)361-372.
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/11154/149536
ISSN: 0031-8884
Appears in Collections:Departamento de Biología Comparada
Dr. Eberto Novelo Maldonado

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