Abstract
The area of the soil influenced by plant roots is named rhizosphere. Among the microorganisms inhabiting the rhizosphere, several are plant growth promoting rhizobacteria (PGPR). Among PGPR species, some promote plant growth through direct effects on the plant, while other rhizosphere bacterial species benefit plant growth through reduction of damage caused by plant pathogens. This chapter deals with the aforementioned first class of PGPR. We focus mainly on bacteria belonging to the Azospirillum genus, as these bacteria have been deeply investigated in terms of plant growth promotion mechanisms. Moreover, inoculants (products that contain bacterial cells in a suitable carrier for agricultural use) with Azospirillum strains have been developed and are being used on a commercial scale. Other PGPR with potential to promote crop yields include species from the Herbaspirillum, Gluconacetobacter, Burkholderia, Pseudomonas, and Paenibacillus genera. Selected species from these genera, with plant growth promotion potential, are also described in this chapter, with emphasis on the properties of these bacteria that are associated with survival, fitness, and plant growth promotion mechanisms.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
