1887

Abstract

The cyanobacterial genus is an important contributor to carbon and nitrogen bioavailability in terrestrial ecosystems and a frequent partner in symbiotic relationships with non-diazotrophic organisms. However, since this currently is a polyphyletic genus, the diversity of -like cyanobacteria is considerably underestimated at this moment. While reviewing the phylogenetic placement of previously isolated -like cyanobacteria originating from Brazilian Amazon, Caatinga and Atlantic forest samples, we detected 17 strains isolated from soil, freshwater, rock and tree surfaces presenting patterns that diverged significantly from related strains when ecological, morphological, molecular and genomic traits were also considered. These observations led to the identification of the evaluated strains as representative of three novel nostocacean genera and species: gen. nov., sp. nov.; gen. nov., sp. nov.; and gen. nov., sp. nov., which are herein described according to the rules of the International Code of Nomenclature for algae, fungi and plants. This finding highlights the great importance of tropical and equatorial South American ecosystems for harbouring an unknown microbial diversity in the face of the anthropogenic threats with which they increasingly struggle.

Funding
This study was supported by the:
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (Award 306851/2017-2)
    • Principle Award Recipient: LuisHenrique Zanini Branco
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (Award 302599/2016-9)
    • Principle Award Recipient: Alessandrode Mello Varani
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (BR) (Award 306803/2018-6)
    • Principle Award Recipient: MarliFátima Fiore
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (Award 2009/15402-1)
    • Principle Award Recipient: AnaPaula Dini Andreote
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (Award 2011/08092-6)
    • Principle Award Recipient: DanilloOliveira Alvarenga
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (Award 2013/50425-8)
    • Principle Award Recipient: MarliFátima Fiore
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2021-05-25
2022-06-30
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