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.
MECHANISMS AND PRACTICAL CONSIDERATIONS INVOLVED IN PLANT GROWTH PROMOTION BY RHIZOBACTERIA
O. Martinez-Viveros,M. Jorquera,D. Crowley,G. Gajardo,M. Mora
Published 2010 in Journal of Soil Science and Plant Nutrition
ABSTRACT
PUBLICATION RECORD
- Publication year
2010
- Venue
Journal of Soil Science and Plant Nutrition
- Publication date
2010-07-01
- Fields of study
Agricultural and Food Sciences, Biology, Environmental Science
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- External record
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Semantic Scholar
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