MECHANISMS AND PRACTICAL CONSIDERATIONS INVOLVED IN PLANT GROWTH PROMOTION BY RHIZOBACTERIA

By O. Martinez-Viveros, Milko A. Jorquera, David E. Crowley, G. Gajardo, María de la Luz Mora. 2010

664 citations recorded by the source corpus.

Rhizobacteria are capable of stimulating plant growth through a variety of mechanisms that include improvement of plant nutrition, production and regulation of phytohormones, and suppression of disease causing organisms. While considerable research has demonstrated their potential utility, the successful application of plant growth promoting rhizobacteria (PGPR) in the field has been limited by a lack of knowledge of ecological factors that determine their survival and activity in the plant rhizosphere. To be effective, PGPR must maintain a critical population density of active cells. Inoculation with PGPR strains can temporarily enhance the population size, but inoculants often have poor survival and compete with indigenous bacteria for available growth substrates. PGPR often have more than one mechanism for enhancing plant growth and experimental evidence suggests that the plant growth stimulation is the net result of multiple mechanisms of action that may be activated simultaneously. The aim of this review is to describe PGPR modes of action and discuss practical considerations for PGPR use in agriculture.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/2acd560764c158d323b606fca6b008df8805fa8a

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Citations in the corpus

Antagonistic features displayed by Plant Growth Promoting Rhizobacteria (PGPR): A Review (2017, background): “Antibiotics produced by PGPR include kanosamine, 2, 4-diacetylphloroglucinol (2, 4-DAPG), Martínez-Viveros oligomycin A, butyrolactones, xanthobaccin phenazine-1-carboxylic acid, pyrrolnitrin, zwittermycin A, viscosinamide [38].”
Rhizosphere: its structure, bacterial diversity and significance (2014, background): “…likely mechanisms underlying their favorable effects and contributions towards plant growth promotion, PGPR generally fall into at least one of the following categories (Viveros et al. 2010): I. Bioprotectants: It includes PGPR strains that suppress the pathogens and hence control plant diseases.”
Nutrient cycling in the mycorrhizosphere (2015, neutral): “Particularly, the PGPR are involved in several plant-beneficial activities such as nutrient cycling, including nitrogen (N) fixation and phosphate (P) mobilization, and in the biological control of plant pathogens (Martínez-Viveros et al., 2010).”
Indole acetic acid and phytase activity produced by rhizosphere bacilli as affected by pH and metals (2011, background): “nisms acting simultaneously (Martínez-Viveros et al., 2010).”
Beneficial effect of plant growth promoting bacteria isolated from the roots of potato plant (2013, background): “Plant growth regulators produced by some bacteria are signal molecules acting as chemical messengers and play a fundamental role as growth and development regulators in the plant (Martinez-Viveros et al., 2010).”
Role of Plant Growth Promoting Rhizobacteria in Agricultural Sustainability—A Review (2016, background): “The successful utilization of PGPR is dependent on its survival in soil, the compatibility with the crop on which it is inoculated, the interaction ability with indigenous microflora in soil, and environmental factors [8].”
Biostimulants in Plant Science: A Global Perspective (2017, background): “Martínez-Viveros et al., 2010 Agricultural Biostimulants “Include diverse formulations of compounds, substances and other products that are applied to plants or soils to regulate and enhance the crop’s physiological processes, thus making them more efficient.”
Future challenges and perspectives for applying microbial biotechnology in sustainable agriculture based on a better understanding of plant-microbiome interactions (2015, neutral): “The PGPR must have the ability to survive and multiply in rhizosphere microhabitats, in competition with native microbiota, at least for the time needed to express their beneficial plant growth promotion activities (Mártinez-Viveros et al., 2010).”
Up to 52 % N fertilizer replaced by biofertilizer in lowland rice via farmer participatory research (2014, background): “…of plant growth-promoting microorganisms under field conditions perhaps because of inadequate quality control combined with a lack of understanding of the ecology and survival of these microorganisms, practical application of inoculant biofertilizers remains limited (Martinez-Viveros et al. 2010).”