Resumo

MORENO RESENDEZ, Alejandro et al. Plant growth promoting rhizobacteria: a biofertilization alternative for sustainable agriculture. Rev. colomb. biotecnol [online]. 2018, vol.20, n.1, pp.68-83. ISSN 0123-3475.  https://doi.org/10.15446/rev.colomb.biote.v20n1.73707.

Modern agriculture faces new challenges, integrating ecological and molecular approaches, to achieve higher crop yields and to minimize negative impacts on the environment. To generate higher yields, the doses of synthetic fertilizers per unit area have been significantly increased, which can cause contamination, damage to the health and loss of soil fertility, making this one of the most important concerns in agricultural production. To improve production without the use of fertilizers of chemical origin, research has been oriented towards the development of new biotechnologies: causing a growing interest in beneficial microorganisms in the soil, as these can promote plant growth and, in some cases, avoid infections of plant tissue by pathogens. The interactions of plant growth promoting rhyzobacteria (PGPR) with the biotic medium - plants and microorganisms - are very complex and use different mechanisms of action to promote plant growth. These mechanisms are grouped into: 1) Biofertilization; 2) Phytostimulation and 3) Biocontrol. Inoculating the crops with PGPR could substantially reduce the use of synthetic fertilizers and the negative impacts to the soil, increase crop yields, contributing to the producer's economy and the population's nutrition. This review describes basic aspects inherent to the interaction between PGPR and plant species, focusing on the benefits of PGPR to the agricultural activity.

Palavras-chave : Biotic activity; biocontrol; inoculation; microorganisms; rhizosphere.

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