Open AccessPhylogenetic diversity of nonmarine picocyanobacteria
Author(s) -
Callieri Cristiana,
Coci Manuela,
Corno Gianluca,
Macek Miroslav,
Modenutti Beatriz,
Balseiro Esteban,
Bertoni Roberto
Publication year - 2013
Publication title -
fems microbiology ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.377
H-Index - 155
eISSN - 1574-6941
pISSN - 0168-6496
DOI - 10.1111/1574-6941.12118
Subject(s) - biology , phylogenetic tree , phylogenetic diversity , clade , phylogenesis , glacial period , phylogenetics , ecology , synechococcus , evolutionary biology , zoology , paleontology , gene , genetics , cyanobacteria , bacteria
We studied the phylogenetic diversity of nonmarine picocyanobacteria broadening the sequence data set with 43 new sequences of the 16 S r RNA gene. The sequences were derived from monoclonal strains isolated from four volcanic high‐altitude athalassohaline lakes in M exico, five glacial ultraoligotrophic N orth P atagonian lakes and six Italian lakes of glacial, volcanic and morenic origin. The new sequences fall into a number of both novel and previously described clades within the phylogenetic tree of 16 S r RNA gene. The new cluster of L ake N ahuel H uapi ( N orth P atagonia) forms a sister clade to the subalpine cluster II and the marine S ynechococcus subcluster 5.2. Our finding of the novel clade of ‘halotolerants’ close to the marine subcluster 5.3 ( S ynechococcus RCC 307) constitutes an important demonstration that euryhaline and marine strains affiliate closely. The intriguing results obtained shed new light on the importance of the nonmarine halotolerants in the phylogenesis of picocyanobacteria.