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Plant-growth-promoting compounds produced by two agronomically important strains of Azospirillum brasilense, and implications for inoculant formulation

Az39 and Cd showed differential capability to produce the five major phytohormones and CAD in chemically defined medium, which has important technological implications for inoculant formulation as different concentrations of growth regulators are produced by different strains or culture conditions.
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Isolation and characterization of endophytic plant growth-promoting (PGPB) or stress homeostasis-regulating (PSHB) bacteria associated to the halophyte Prosopis strombulifera

Evaluating in vitro the bacterial mechanisms related to plant growth promotion or stress homeostasis regulation in natural conditions discusses the possible implications of these bacterial mechanisms on the plant growth promoted or homeostatic regulation innatural conditions.
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Phytohormone production by three strains of Bradyrhizobium japonicum and possible physiological and technological implications

This is the first report of IAA, GA3, zeatin, ethylene, and ABA production by B. japonicum in pure cultures, using quantitative physicochemical methodology.
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Azospirillum brasilense Az39 and Bradyrhizobium japonicum E109, inoculated singly or in combination, promote seed germination and early seedling growth in corn (Zea mays L.) and soybean (Glycine max…

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Gibberellin production by bacteria and its involvement in plant growth promotion and yield increase

This review focuses on studies with bacteria for which biosynthesis/production of the plant hormones gibberellins have been demonstrated and the potential involvement of symbiotic and soil-endophytic microorganisms in plant growth promotion and yield increase.
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Physiological and Agronomical Aspects of Phytohormone Production by Model Plant-Growth-Promoting Rhizobacteria (PGPR) Belonging to the Genus Azospirillum

This review summarizes information related to the biosynthesis, metabolism, regulation, physiological role, and agronomical impact of phytohormones produced by the model plant-growth-promoting rhizobacteria belonging to the genus Azospirillum, considered to be one of the most representative PGPR.
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Azospirillum sp. Promotes Root Hair Development in Tomato Plants through a Mechanism that Involves Ethylene

It is proposed that the process of growth promotion triggered by A. brasilense inoculation involves a signaling pathway that has ethylene as a central, positive regulator.
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Cadaverine production by Azospirillum brasilense and its possible role in plant growth promotion and osmotic stress mitigation

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Azospirillum sp. in current agriculture: From the laboratory to the field

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Azospirillum brasilense and Azospirillum lipoferum hydrolyze conjugates of GA20 and metabolize the resultant aglycones to GA1 in seedlings of rice dwarf mutants.

Results of capillary gas chromatography-mass spectrometry analysis show that sheath elongation growth of two single gene GA-deficient dwarf rice (Oryza sativa) mutants was due primarily to release of the aglycone [17,17-2H2]GA20 and its subsequent 3beta-hydroxylation to [17-17- 2H2], and by both the rice plant and microorganism for the dx mutant.
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