%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Cellamare, M.
%A Duval, C.
%A Drelin, Y.
%A Djediat, C.
%A Touibi, N.
%A Agogue, H.
%A Leboulanger, Christophe
%A Ader, M.
%A Bernard, C.
%T Characterization of phototrophic microorganisms and description of new cyanobacteria isolated from the saline-alkaline crater-lake Dziani Dzaha (Mayotte, Indian Ocean)
%D 2018
%L fdi:010073756
%G ENG
%J FEMS Microbiology Ecology
%@ 0168-6496
%K cyanobacteria ; microalgae ; crater-lake ; saline-alkaline lake ; polyphasic approach ; Arthrospira
%K OCEAN INDIEN ; MAYOTTE ; DZIANI DZAHA LAC
%M ISI:000441198800012
%N 8
%P fiy108 [25 ]
%R 10.1093/femsec/fiy108
%U https://www.documentation.ird.fr/hor/fdi:010073756
%> https://www.documentation.ird.fr/intranet/publi/2018/08/010073756.pdf
%V 94
%W Horizon (IRD)
%X The saline-alkaline crater-lake Dziani Dzaha (Mayotte, Indian Ocean) is dominated by the bloom-forming cyanobacterium Arthrospira. However, the rest of the phototrophic community remains underexplored because of their minute dimension or lower biomass. To characterize the phototrophic microorganisms living in this ecosystem considered as a modern analog of Precambrian environments, several strains were isolated from the water column and stromatolites and analyzed using the polyphasic approach. Based on morphological, ultrastructural and molecular (16S rRNA gene, 18S rRNA gene, 16S-23S internal transcribed spacer (ITS) region and cpcBA-IGS locus) methods, seven filamentous cyanobactena and the prasinophyte Ptcocystis salinarum were identified. Two new genera and four new cyanobacteria species belonging to the orders Oscillatoriales (Desertifilum dzianense sp. nov.) and Synechococcales (Sodalinema komareku gen. nov., sp. nov., Sodaleptofyngbya stromatolitii gen. nov.., sp. nov. and Haloleptolyngbya elongata sp. nov.) were described. This approach also allowed to identify Arthrospira fusiformis with exclusively straight trichomes instead of the spirally coiled form commonly observed in the genus. This study evidenced the importance of using the polyphasic approach to solve the complex taxonomy of cyanobactena and to study algal assemblages from unexplored ecosystems.
%$ 034 ; 020