Mechanisms of plant growth promoting rhizobacteria on growth indices, physiology, nutrient uptake and production of secondary metabolites in medicinal plants

Document Type : Original Article

Authors

1 Ph.D Student of soil biology and biotechnology, Gorgan University of Agricultural sciences and Natural Resources

2 Associated Professor, Department of Soil Science, Gorgan University of Agricultural Sciences and Natural Resources

Abstract

Nowadays, the general approach to the use of medicinal plants is increasing because of the growing awareness of the negative side effects of chemical drugs and antibiotics. due to traditionally high demand for the medicinal plants, it has been impossible to cater for entire market needs, so increasing the cultivation of medicinal plants is inevitable. Production of medicinal plants on an industrial scale requires the use of new bio-technologies that also enhance the production, quality and health of medicinal plants. The positive effect of application of plant growth promoting bacteria on growth parameters, improvement of bioactive compounds as well as quality of medicinal plants as a new bio-friendly and environmentally friendly method has been demonstrated.  Growth promoting bacteria by nutrient supply to the plant using  phosphorus and potassium solubilization mechanism, as well as  biological nitrogen fixation and siderophore production, maintaining hormonal balance in plants by producing growth hormones (auxin, cytokinin, gibberellin) and ACC-deaminase, bio-control of plant pathogens, as well as production of volatile organic compounds and hydrogen cyanide) and the role of elicitors in inducing systemic resistance in medicinal plants, improve growth, physiological and production of secondary metabolites in medicinal plants. The aim of this study was to investigate the mechanisms of plant growth promoting rhizobacteria (PGPR) on growth parameters, physiology, nutrient uptake and production of secondary metabolites in some medicinal plants.

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