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Genome analysis and biogeographic distribution of the earliest divergent Frankia clade in the southern hemisphere
FEMS Microbiology Ecology ( IF 4.2 ) Pub Date : 2024-03-23 , DOI: 10.1093/femsec/fiae042 Fede Berckx 1, 2 , Daniel Wibberg 3 , Andreas Brachmann 4 , Ciara Morrison 1 , Nadia Binte Obaid 1 , Jochen Blom 5 , Jörn Kalinowski 3 , Luis Gabriel Wall 6, 7 , Katharina Pawlowski 1
FEMS Microbiology Ecology ( IF 4.2 ) Pub Date : 2024-03-23 , DOI: 10.1093/femsec/fiae042 Fede Berckx 1, 2 , Daniel Wibberg 3 , Andreas Brachmann 4 , Ciara Morrison 1 , Nadia Binte Obaid 1 , Jochen Blom 5 , Jörn Kalinowski 3 , Luis Gabriel Wall 6, 7 , Katharina Pawlowski 1
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Coriariaceae are a small plant family of 14-17 species and subspecies that currently have a global but disjunct distribution. All species can form root nodules in symbiosis with diazotrophic Frankia cluster-2 strains, which form the earliest divergent symbiotic clade within this bacterial genus. Studies on Frankia cluster-2 mostly have focused on strains occurring in the northern hemisphere. Except for one strain from Papua New Guinea, namely Candidatus Frankia meridionalis Cppng1, no complete genome of Frankia associated with Coriaria occurring in the southern hemisphere has been published thus far, yet the majority of the Coriariaceae species occur here. We present field sampling data of novel Frankia cluster-2 strains, representing two novel species, which are associated with Coriaria arborea and Coriaria sarmentosa in New Zealand, and with Coriaria ruscifolia in Patagonia (Argentina), in addition to identifying Ca. F. meridionalis present in New Zealand. The novel Frankia species were found to be closely related to both Ca. F. meridionalis, and a Frankia species occurring in the Philippines, Taiwan, and Japan. Our data suggest that the different Frankia cluster-2 species diverged early after becoming symbiotic circa 100 million years ago.
更新日期：2024-03-23
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