Given the hypothesis that co-inoculation with plant growth-promoting bacteria (PGPB) enhances beneficial effects of Rhizobium tropici greater mineral nutrition, optimizes biological nitrogen fixation and reduces use fertilizers in bean plants, objective this research was to evaluate synergistic associated Azospirillum brasilense, Bacillus subtilis, Pseudomonas fluorescens their combinations, on...

The activity of a truncated form of Herbaspirillum seropedicae NifA in different genetic backgrounds showed that its regulatory domain is involved in nitrogen control but not in O2 sensitivity or Fe dependence. The model for nitrogen control involving PII could thus apply to the proteobacteria at large. NifA may have a role in controlling ADP-ribosylation of nitrogenase in Azospirillum brasilense.

A qualidade de sementes é fundamental para obtenção um estande plântulas uniforme e com maior capacidade resistir às adversidades no estabelecimento da lavoura. Tecnologias proteção nutrição plantas são aplicadas via tratamento sementes, contudo pode ocorrer incompatibilidade dos produtos utilizados. O objetivo dessa pesquisa foi avaliar a manutenção fisiológica, o desenvolvimento inicial culti...

The objective of this study was to determine the effects inoculation corn seeds with Azospirillum brasilense on grain and fodder production, nutritional value fermentative characteristics silage. experimental design completely randomized consisted two treatments A. control. nutritive silages yield were evaluated. did not increase forage production (P> 0.05) however it resulted in an (P <0...

Eight endophytic isolates assigned to Pseudomonas, Azospirillum, and Bacillus genera according to pheno-genotypic features were retrieved from barley seeds under selective pressure for nitrogen-fixers. Genetic relationships among related isolates were investigated through RAPD. Six isolates displayed nitrogen-fixing ability, while all could biosynthesize indolacetic acid in vitro and showed no ...

When grown under suboptimal conditions, rhizobacteria of the genus Azospirillum produce high levels of poly-beta-hydroxybutyrate (PHB). Azospirillum brasilense strain Sp7 and a phbC (PHB synthase) mutant strain in which PHB production is impaired were evaluated for metabolic versatility, for the ability to endure various stress conditions, for survival in soil inoculants, and for the potential ...

The plant-associated nitrogen-fixing rhizobacterium Azospirillum brasilense attracts world-wide attention owing to its plant growth-promoting activities. Among hundreds of its strains known up to date, wild-type strain Sp245 has been proved to be capable of colonising both the plant-root interior and exterior (i.e. a facultative endophyte), whereas others are non-endophytes colonising the root ...

Genetic data suggest that the oligotrophic freshwater bacterium Caulobacter crescentus metabolizes D-xylose through a pathway yielding alpha-ketoglutarate, comparable to the recently described L-arabinose degradation pathway of Azospirillum brasilense. Enzymes of the C. crescentus pathway, including an NAD(+)-dependent xylose dehydrogenase, are encoded in the xylose-inducible xylXABCD operon (C...

To evaluate the effect of Azospirillum and mycorrhizal soil fungi on nutrition Jerusalem artichoke crop (Helianthus tuberosus L.), determinations agronomic parameters health status plants were carried out under field conditions. The tests out, at time implantation culture: "seeds" inoculated with A. brasilense native fungi, generating four treatments including control co-inoculation consortium ...

this research was carried out for the purpose of urea fertilizer, organic matter and pgpr bacteria effects on yield and some growth indices on winter wheat (triticum aestivum c.v alvand). this research was carried out with factorial experiment on completely randomized design with 4 replication in greenhouse. treatments included bacteria 4 levels, without bacteri, a. brasilense, a. chroococum, i...