Abstract
Plants in their ecological niches establish multiple interactions with arthropods and rhizosphere microorganisms. Plant growth-promoting rhizobacteria (PGPR) and soil-borne fungi can establish molecular dialogues with plants by producing powerful molecules such as ethylene (ET), auxins (IAA), cytokinins (CKs), and gibberellins (GAs) that activate specific molecular mechanisms that subsequently modulate specific physiological processes such as cell division, expansion, or cellular differentiation, whereas abscisic acid (ABA) or enzymatic components as the 1-aminocyclopropane-1-carboxylate deaminase (ACCase) have the ability to induce resistance to different kinds of abiotic stresses as salinity and drought. The microbial root interaction might activate defense responses mediated by the phytohormones salicylic acid (SA) or jasmonic acid (JA) that result effectives against the attack of plant pathogenic microorganisms (hemi- and biotrophic or necrotrophic pathogens) or chewing and piercing sucking insects. This chapter highlights the role of several microbial metabolites that impact on the molecular mechanisms modulated by phytohormones that regulate defense responses and the growth and development of plants.
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Acknowledgments
We thank Prasun K. Mukherjee (Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India) and Benjamin A. Horwitz (Faculty of Biology Technion—Israel Institute of Technology) for kindly inviting us to contribute this book chapter. We apologize to colleagues whose relevant work we were unable to cite owing to space limitations. The authors declare that they have no conflict of interest.
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Contreras-Cornejo, H.A., Ramírez-Ordorica, A., Álvarez-Navarrete, M., Macías-Rodríguez, L. (2022). The Role of Phytohormones in Cross-communication Between Plants and Rhizo-Microbes. In: Horwitz, B.A., Mukherjee, P.K. (eds) Microbial Cross-talk in the Rhizosphere. Rhizosphere Biology. Springer, Singapore. https://doi.org/10.1007/978-981-16-9507-0_4
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