Polysaccharide production by Azospirillumstrains was indicated by fluorescence on growth media containing calcofluor. Mutants showing decreased and. The interactions between Azospirillum lipoferum, Azotobacter chroococcum and Rhizobium spp. were assessed by the growth pattern and mineral concentration . Efecto de Azospirillum lipoferum y fertilización nitrogenada en el contenido de clorofila, absorción de nutrientes y propiedades biométricas de Zea mays L.

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Thus, it seems likely that the plant has some intrinsic capacity to hydrolyze GA-glucosyl conjugates.

Azospirillum lipoferum

Azospirillum lipoferum and nitrogen fertilization effect on chlorophyll content, nutrients pipoferum and biometric properties of Zea mays L. After filtration the solid residue was extracted again and filtered.

It was also found that application of GA 3 in concentrations similar to those produced by the microorganism, or by inoculation with different Azospirillum spp. Distilled water make up to Phytohormone production Tien et al. National Center for Biotechnology InformationU.

For referencing data from this strain:. Plant growth substances produced by Azospirillum brasilense and their effect on the growth of pearl millet Pennisetum americanum L. Gibberellin production by bacteria and its involvement in plant growth promotion and yield increase. A taxonomic study of the Spirillum lipoferum group, with descriptions of a new genus, Azospirillum gen.


The aim was to determine the effect of inoculation with A. Please enter a password. Data were tested for normal distribution and subjected to statistical analysis using SAS. Open in a separate window.

Ardakani and Mafakheri also point out that inoculating wheat seed with Azospirillum significantly affect plant growth factors.

From MicrobeWiki, the student-edited microbiology resource. The result of our study showed that inoculation with Azospirillum increased N, P, Fe and Zn contents by azpspirillum We use cookies to improve our website and your experience when using it. Click here to see all.

Bacterial counts were made for both shoots and roots of control and treated rice seedlings using plates of NFb agar. The dx mutant was much more efficient than the dy mutant in utilizing the glucosyl conjugates of [17,17 2 H 2 ]GA 20 for sheath llipoferum growth.

Name and taxonomic classification. Effect of combined application of Rhizobium, phosphate solubilizing bacterium and Trichoderma spp.

Azospirillum – Wikipedia

Pseudomonas fluorescens and Bacillus megaterium strains were the most powerful phosphate solubilizers on Pikovskaya PVK plates and liquid medium. Azospirillum lipoferumis a free living, gram positive, plant-growth-promoting a-proteobacteria, capable of affecting the growth and yield of numerous plant species, many of agronomic and ecological significance.

Skerman VB, et al. Azospirillum lipoferum strain USA5b kindly provided by Dr. Rice seedlings had been treated with GA-A 20 -glucosyl conjugates and inoculated with Azospirillum spp. The improvement of plant yield may result from the ability of bacteria to remove soil pathogens, produce plant growth regulators such as gibberellins, cytokines and auxin, aospirillum plant access to nutrients, fix air N into the soil and facilitate the development of root system Bashan et al.


Received May 10, Accepted November 22, Key words: Microbial co-operation in the rhizosphere. PID to R. However, dx seedlings without Azospirillum spp. Sadasivan L, Neyra CA.


Treatments are summarized as follows: Fe and Zn were measured by atomic absorption. Metabolism of 17,[ 2 H 2 ]-gibberellin A 20 to 17,[ 2 H 2 ]gibberellin A 1 by Azospirillum lipoferum cultures. Find articles by Gernot Schneider. Endophytic presence of the bacteria in roots and stems of inoculated plants was shown for both cultivars of all experiments summarized in Table III.

Gibberellin production in Azospirillum lipoferum cultures is enhanced by light.

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