The effect of the bacterium Azospirillum brasilense jointly immobilized with Chlorella vulgaris or C. sorokiniana in alginate beads on total carbohydrates and starch was studied under dark and heterotrophic conditions for 144 h in synthetic growth medium supplemented with either d-glucose or Na-acetate as carbon sources. In all treatments, enhanced total carbohydrates and starch content per cul...

The study was undertaken to analyze the rate of uptake and utilization of various amino acids by Azospirillum brasilense Sp81 (RG) in a basal mineral salts solution under non-nitrogen fixing condition. These amino acids including other nitrogenous compounds were tested for both N- and C-sources. The kinetic constants (Km and Vmax) of uptake of some amino acids (e.g. lysine, arginine, proline, g...

A number of soil-borne microorganisms, such as mycorrhizal fungi and rhizobacteria, establish mutualistic interactions with plants, which can indirectly affect other organisms. Knowledge of the plant-mediated effects of mutualistic microorganisms is limited to aboveground insects, whereas there is little understanding of what role beneficial soil bacteria may play in plant defense against root ...

ABSTRACT Using beneficial fungi and bacteria to plant growth may reduce the leaf nitrate content improve quality of produced food. This study aimed evaluate isolated combined effect inoculation with Azospirillum brasilense Trichoderma hazianum at two electrical conductivities on nutrition production hydroponic arugula cultivation. The experiment was designed in randomized blocks, a 4 x 2 factor...

A major 30.5-kb cluster of nif and associated genes of Acetobacter diazotrophicus (syn. Gluconacetobacter diazotrophicus), a nitrogen-fixing endophyte of sugarcane, was sequenced and analyzed. This cluster represents the largest assembly of contiguous nif-fix and associated genes so far characterized in any diazotrophic bacterial species. Northern blots and promoter sequence analysis indicated ...

Brazil is the second world producer of bovine meat, which often relies on preserved forage to decrease seasonality production. Increased accumulation may be favored by technologies such as inoculation. Research works this theme have been conducted with Azospirillum brasilense associated oats, ryegrass and guinea grass. However, response jiggs, a widely cultivated perennial grass, plant growth-p...