@article{fdi:010072808,
  title = {{P}hylogeny and salt-tolerance of freshwater {N}ostocales strains : contribution to their systematics and evolution},
  author = {{D}uval, {C}. and {T}homazeau, {S}. and {D}relin, {Y}. and {Y}epremian, {C}. and {B}ouvy, {M}arc and {C}ouloux, {A}. and {T}roussellier, {M}. and {R}ousseau, {F}. and {B}ernard, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}hylogenetic relationships among heterocytous genera (the {N}ostocales order) have been profoundly modified since the use of polyphasic approaches that include molecular data. {T}here is nonetheless still ample scope for improving phylogenetic delineations of genera with broad ecological distributions, particularly by integrating specimens from specific or up-to-now poorly sampled habitats. {I}n this context, we studied 36 new isolates belonging to {C}hrysosporum, {D}olichospermum, {A}nabaena, {A}nabaenopsis, and {C}ylindrospermopsis from freshwater ecosystems of {B}urkina-{F}aso, {S}enegal, and {M}ayotte {I}sland. {S}tudying strains from these habitats is of particular interest as we suspected different range of salt variations during underwent periods of drought in small ponds and lakes. {S}uch salt variation may cause different adaptation to salinity. {W}e then undertook a polyphasic approach, combining molecular phylogenies, morphological analyses, and physiological measurements of tolerance to salinity. {M}olecular phylogenies of 117 {N}ostocales sequences showed that the 36 studied strains were distributed in seven lineages: {D}olichospermum, {C}hrysosporum, {C}ylindrospermopsis {R}aphidiopsis, {A}nabaenopsis, {A}nabaena sphaerica var tenuis/{S}phaerospermopsis, and two independent {A}nabaena sphaerica lineages. {P}hysiological data were congruent with molecular results supporting the separation into seven lineages. {I}n an evolutionary context, salinity tolerance can be used as an integrative marker to reinforce the delineation of some cyanobacterial lineages. {T}he history of this physiological trait contributes to a better understanding of processes leading to the divergence of cyanobacteria. {I}n this study, most of the cyanobacterial strains isolated from freshwater environments were salt-tolerant, thus suggesting this trait constituted an ancestral trait of the heterocytous cyanobacteria and that it was probably lost two times secondarily and independently in the ancestor of {D}olichospermum and of {C}ylindrospermopsis.},
  keywords = {{C}yanobacteria ; het{R} ; {M}orphology ; nij{H} ; {N}ostocaceae ; {P}hylogeny ; {P}hysiology ; {P}olyphasic approach ; {S}alt-tolerance},
  booktitle = {},
  journal = {{H}armful {A}lgae},
  volume = {73},
  numero = {},
  pages = {58--71},
  ISSN = {1568-9883},
  year = {2018},
  DOI = {10.1016/j.hal.2018.01.008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072808},
}