nitrogenase/oryza sativa

An intact method for measuring immediately linear rates of acetylene reduction was used to investigate the relationship between temperature, pH, O(2) concentration, and light intensity with the rate of root-associated nitrogenase activity in rice (Oryza sativa L.). Nitrogenase activity varied over a

The relationship between the rates of nitrogenase, nitrate reductase, and glutamine synthetase activities, and plant ontogeny in rice (Oryza sativa L.), cultivar ;M9', grown in salt marsh sediment with and without nitrate treatment was studied. In both treatments, nitrogenase activity measured as

The endophyte Azoarcus sp. strain BH72 expresses nitrogenase (nif) genes inside rice roots. We applied a proteomic approach to dissect responses of rice roots toward bacterial colonization and jasmonic acid (JA) treatment. Two sister lineages of Oryza sativa were analyzed with cv. IR42 showing a

Several important bacterial characteristics, such as biological nitrogen fixation, phosphate solubilisation, 1-aminocyclopropane-1-carboxylate deaminase activity, and production of siderophores and phytohormones, can be assessed as plant growth promotion traits. Our aim was to evaluate the effects

Several diazotrophic species of Azoarcus spp. occur as endophytes in the pioneer plant Kallar grass. The purpose of this study was to screen Asian wild rice and cultivated Oryza sativa varieties for natural association with these endophytes. Populations of culturable diazotrophs in

Engineering biological nitrogen fixation in eukaryotic cells by direct introduction of nif genes requires elegant synthetic biology approaches to ensure that components required for the biosynthesis of active nitrogenase are stable and expressed in the appropriate stoichiometry. Previously,

Endophytic colonization in rice was induced using rhizobia. Dehusked seeds of rice hybrid, CORH2, were used as explants for induction of calli. MS medium was modified with 2,4-D (2.5 mg l(-1)) and kinetin (0.2 mg l(-1)) for callus induction. Well-developed calli were inoculated with Azorhizobium

The Methylobacterium sp. strain NPFM-SB3, isolated from Sesbania rostrata stem nodules possessed nitrogenase activity and nodA genes. Pure culture of NPFM-SB3 strain produced indole-3-acetic acid, cytokinins and on inoculation to rice plants resulted in numerous lateral roots. Inoculation of

Cyanobacteria are phototrophic microorganisms able to establish nitrogen-fixing symbiotic associations with representatives of all four of the major phylogenetic divisions of terrestrial plants. Despite the increasing knowledge on the beneficial effects of cyanobacteria in rice fields, the

The time course profiles of C(2)H(2) reduction by intact Scirpus olneyi (bulrush), Oryza sativa (rice) and Spartina alterniflora (cordgrass) with roots in atmospheres of N(2) and 30-day-old Glycine max (soybean) in air were all immediately linear. This is the first report of immediately linear rates

The diversity and function of nitrogen-fixing bacteria colonizing rice roots are not well understood. A field experiment was conducted to determine the diversity of diazotrophic communities associated with roots of modern rice cultivars using culture-independent molecular analyses of nitrogenase

The invasive properties of Azoarcus sp. strain BH72, an endorhizospheric isolate of Kallar grass, on gnotobiotically grown seedlings of Oryza sativa IR36 and Leptochloa fusca (L.) Kunth were studied. Additionally, Azoarcus spp. were localized in roots of field-grown Kallar grass. To facilitate

Cultivation-independent studies suggest that roots of rice (Oryza sativa) are colonized by a diverse community of nitrogen-fixing bacteria. Here we report for the first time mRNA-based profiling of nitrogenase (nifH) genes, to study the impact of lowland-rice genotypes at the cultivar level on the

CONCLUSIONS The diversity of endophytic and epiphytic diazotrophs in different parts of rice plants has specificity to the niche (i.e. leaf, stem and root) of different genotypes and nutrient availability of the organ. Inoculation of the indigenous, polyvalent diazotrophs can facilitate and sustain

In a previous study by our group, CH4 oxidation and N2 fixation were simultaneously activated in the roots of wild-type rice plants in a paddy field with no N input; both processes are likely controlled by a rice gene for microbial symbiosis. The present study examined which microorganisms in rice