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amoA-based consensus phylogeny of ammonia-oxidizing archaea and deep sequencing of amoA genes from soils of four different geographic regions
TLDR
An archaeal amoA consensus phylogeny is presented based on all publicly available sequences and evidence for the diversification of AOA into four previously recognized clusters and one newly identified major cluster is provided.
Living inside plants: bacterial endophytes.
Root colonization and systemic spreading of Azoarcus sp. strain BH72 in grasses
TLDR
PCR and Western immunoblotting, using primers specific for eubacteria and antibodies recognizing type-specific antigens, indicated that strain BH72 could colonize rice plants systemically, probably mediated by longitudinal spreading through vessels.
Complete genome of the mutualistic, N2-fixing grass endophyte Azoarcus sp. strain BH72
TLDR
Genome comparison with the Azoarcus-related soil bacterium strain EbN1 revealed a surprisingly low degree of synteny, indicating a low rate of recent gene transfer that is presumably due to adaptation to a stable, low-stress microenvironment.
Azoarcus gen. nov., Nitrogen-Fixing Proteobacteria Associated with Roots of Kallar Grass (Leptochloa fusca (L.) Kunth), and Description of Two Species, Azoarcus indigens sp. nov. and Azoarcus
TLDR
A new genus is proposed, the genus Azoarcus, for nitrogen-fixing bacteria associated with roots of Leptochloa fusca (L.) Kunth in saline-sodic soils in the Punjab of Pakistan, which have a strictly aerobic type of metabolism, fix nitrogen microaerobically, and grow well on salts of organic acids but not on carbohydrates.
Endophytic Colonization of Rice by a Diazotrophic Strain of Serratia marcescens
TLDR
Six closely related N2-fixing bacterial strains were isolated from surface-sterilized roots and stems of four different rice varieties and it was confirmed that IRBG500 was endophytically established within roots, stems, and leaves.
Life in grasses: diazotrophic endophytes.
Azoarcus grass endophytes contribute fixed nitrogen to the plant in an unculturable state.
The extent to which the N2-fixing bacterial endophyte Azoarcus sp. strain BH72 in the rhizosphere of Kallar grass can provide fixed nitrogen to the plant was assessed by evaluating inoculated plants
Comparative genome analysis of Burkholderia phytofirmans PsJN reveals a wide spectrum of endophytic lifestyles based on interaction strategies with host plants
TLDR
A high genetic diversity among bacterial endophytes as reflected in their genotypic and phenotypic features is revealed and illustrates that a wide spectrum of endophytic life styles exists.
Upregulation of jasmonate-inducible defense proteins and differential colonization of roots of Oryza sativa cultivars with the endophyte Azoarcus sp.
TLDR
Data suggest that plant defense responses involving JA may contribute to restricting endophytic colonization in grasses, and in a compatible interaction with endophytes, JA-inducible stress or defense responses are apparently not important.
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