Research output: Contribution to journal › Article › peer-review
Genome characteristics of facultatively symbiotic Frankia sp. strains reflect host range and host plant biogeography. / Normand, Philippe; Lapierre, Pascal; Tisa, Louis S.; Gogarten, Johann Peter; Alloisio, Nicole; Bagnarol, Emilie; Bassi, Carla A.; Berry, Alison M.; Bickhart, Derek M.; Choisne, Nathalie; Couloux, Arnaud; Cournoyer, Benoit; Cruveiller, Stephane; Daubin, Vincent; Demange, Nadia; Francino, Maria Pilar; Goltsman, Eugene; Huang, Ying; Kopp, Olga R.; Labarre, Laurent; Lapidus, Alla; Lavire, Celine; Marechal, Joelle; Martinez, Michele; Mastronunzio, Juliana E.; Mullin, Beth C.; Niemann, James; Pujic, Pierre; Rawnsley, Tania; Rouy, Zoe; Schenowitz, Chantal; Sellstedt, Anita; Tavares, Fernando; Tomkins, Jeffrey P.; Vallenet, David; Valverde, Claudio; Wall, Luis G.; Wang, Ying; Medigue, Claudine; Benson, David R.
In: Genome Research, Vol. 17, No. 1, 01.2007, p. 7-15.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Genome characteristics of facultatively symbiotic Frankia sp. strains reflect host range and host plant biogeography
AU - Normand, Philippe
AU - Lapierre, Pascal
AU - Tisa, Louis S.
AU - Gogarten, Johann Peter
AU - Alloisio, Nicole
AU - Bagnarol, Emilie
AU - Bassi, Carla A.
AU - Berry, Alison M.
AU - Bickhart, Derek M.
AU - Choisne, Nathalie
AU - Couloux, Arnaud
AU - Cournoyer, Benoit
AU - Cruveiller, Stephane
AU - Daubin, Vincent
AU - Demange, Nadia
AU - Francino, Maria Pilar
AU - Goltsman, Eugene
AU - Huang, Ying
AU - Kopp, Olga R.
AU - Labarre, Laurent
AU - Lapidus, Alla
AU - Lavire, Celine
AU - Marechal, Joelle
AU - Martinez, Michele
AU - Mastronunzio, Juliana E.
AU - Mullin, Beth C.
AU - Niemann, James
AU - Pujic, Pierre
AU - Rawnsley, Tania
AU - Rouy, Zoe
AU - Schenowitz, Chantal
AU - Sellstedt, Anita
AU - Tavares, Fernando
AU - Tomkins, Jeffrey P.
AU - Vallenet, David
AU - Valverde, Claudio
AU - Wall, Luis G.
AU - Wang, Ying
AU - Medigue, Claudine
AU - Benson, David R.
PY - 2007/1
Y1 - 2007/1
N2 - Soil bacteria that also form mutualistic symbioses in plants encounter two major levels of selection. One occurs during adaptation to and survival in soil, and the other occurs in concert with host plant speciation and adaptation. Actinobacteria from the genus Frankia are facultative symbionts that form N 2-fixing root nodules on diverse and globally distributed angiosperms in the "actinorhizal" symbioses. Three closely related clades of Frankia sp. strains are recognized; members of each clade infect a subset of plants from among eight angiosperm families. We sequenced the genomes from three strains; their sizes varied from 5.43 Mbp for a narrow host range strain (Frankia sp. strain HFPCcI3) to 7.50 Mbp for a medium host range strain (Frankia alni strain ACN14a) to 9.04 Mbp for a broad host range strain (Frankia sp. strain EAN1pec.) This size divergence is the largest yet reported for such closely related soil bacteria (97.8%-98.9% identity of 16S rRNA genes). The extent of gene deletion, duplication, and acquisition is in concert with the biogeographic history of the symbioses and host plant speciation. Host plant isolation favored genome contraction, whereas host plant diversification favored genome expansion. The results support the idea that major genome expansions as well as reductions can occur in facultative symbiotic soil bacteria as they respond to new environments in the context of their symbioses.
AB - Soil bacteria that also form mutualistic symbioses in plants encounter two major levels of selection. One occurs during adaptation to and survival in soil, and the other occurs in concert with host plant speciation and adaptation. Actinobacteria from the genus Frankia are facultative symbionts that form N 2-fixing root nodules on diverse and globally distributed angiosperms in the "actinorhizal" symbioses. Three closely related clades of Frankia sp. strains are recognized; members of each clade infect a subset of plants from among eight angiosperm families. We sequenced the genomes from three strains; their sizes varied from 5.43 Mbp for a narrow host range strain (Frankia sp. strain HFPCcI3) to 7.50 Mbp for a medium host range strain (Frankia alni strain ACN14a) to 9.04 Mbp for a broad host range strain (Frankia sp. strain EAN1pec.) This size divergence is the largest yet reported for such closely related soil bacteria (97.8%-98.9% identity of 16S rRNA genes). The extent of gene deletion, duplication, and acquisition is in concert with the biogeographic history of the symbioses and host plant speciation. Host plant isolation favored genome contraction, whereas host plant diversification favored genome expansion. The results support the idea that major genome expansions as well as reductions can occur in facultative symbiotic soil bacteria as they respond to new environments in the context of their symbioses.
UR - http://www.scopus.com/inward/record.url?scp=33845974881&partnerID=8YFLogxK
U2 - 10.1101/gr.5798407
DO - 10.1101/gr.5798407
M3 - Article
C2 - 17151343
AN - SCOPUS:33845974881
VL - 17
SP - 7
EP - 15
JO - Genome Research
JF - Genome Research
SN - 1088-9051
IS - 1
ER -
ID: 90037065