Nitrospirillum viridazoti sp. nov., an Efficient Nitrogen-Fixing Species Isolated from Grasses

A group of Gram-negative plant-associated diazotrophic bacteria belonging to the genus Nitrospirillum was investigated, including both previously characterized and newly isolated strains from diverse regions and biomes, predominantly in Brazil. Phylogenetic analysis of 16S rRNA and recA genes reveal...

Full description

Saved in:

Bibliographic Details
Published in:	Current microbiology Vol. 81; no. 6; p. 144
Main Authors:	Baldani, José Ivo, dos Santos Ferreira, Natália, Shwab, Stefan, Reis, Veronica Massena, de Barros Soares, Luis Henrique, Simões-Araujo, Jean Luiz, dos Santos Dourado, Fernanda, Bach, Evelise, Camacho, Natália Neutzling, de Oliveira, Amanda Maura, Alves, Bruno José Rodrigues, Silva, Andréia Loviane, Rossi, Carolina Nachi, de Oliveira Junior, Alberto Fernandes, Zilli, Jerri Edson
Format:	Journal Article
Language:	English
Published:	New York Springer US 01-06-2024 Springer Nature B.V
Subjects:	Biomedical and Life Sciences Biotechnology Chemotaxonomy Ecological niches Genes Genomes Gram-negative bacteria Grasses Life Sciences Mass spectra Microbiology Neidium iridis New species Nitrogen Nitrogen fixation Nitrogenation Nitrous oxide Novel Prokaryotic Taxa Phospholipids Phylogenetics Phylogeny Physiology Poaceae Quinones RecA protein RNA, Ribosomal, 16S - genetics rRNA 16S Soil types Sorghum Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization Strains (organisms) Sugarcane Synthesis Taxonomy
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	A group of Gram-negative plant-associated diazotrophic bacteria belonging to the genus Nitrospirillum was investigated, including both previously characterized and newly isolated strains from diverse regions and biomes, predominantly in Brazil. Phylogenetic analysis of 16S rRNA and recA genes revealed the formation of a distinct clade consisting of thirteen strains, separate from the formally recognized species N. amazonense (the closest species) and N. iridis . Comprehensive taxonomic analyses using the whole genomes of four strains (BR 11140 T = AM 18 T = Y-2 T = DSM 2788 T = ATCC 35120 T , BR 11142 T = AM 14 T = Y-1 T = DSM 2787 T = ATCC 35119 T , BR 11145 = CBAmC, and BR 12005) supported the division of these strains into two species: N. amazonense (BR 11142 T and BR 12005) and a newly proposed species (BR 11140 T and BR 11145), distinct from N. iridis . The phylogenomic analysis further confirmed the presence of the new Nitrospirillum species. Additionally, MALDI-TOF MS analysis of whole-cell mass spectra provided further evidence for the differentiation of the proposed Nitrospirillum species, separate from N. amazonense . Analysis of chemotaxonomy markers (i.e., genes involved in fatty acid synthesis, metabolism and elongation, phospholipid synthesis, and quinone synthesis) revealed that the new species highlights high similarity and evolutionary convergence with other Nitrospirillum species. This new species exhibited nitrogen fixation ability in vitro , it has similar NifHDK protein phylogeny position with the closest species, lacked denitrification capability, but possessed the nosZ gene, enabling N 2 O reduction, distinguishing it from the closest species. Despite being isolated from diverse geographic regions, soil types, and ecological niches, no significant phenotypic or physiological differences were observed between the proposed new species and N. amazonense . Based on these findings, a new species, Nitrospirillum viridazoti sp. nov., was classified, with the strain BR 11140 T (DSM 2788 T , ATCC 35120 T ) designated as the type strain.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0343-8651 1432-0991
DOI:	10.1007/s00284-024-03665-1