Resumo

AGUIRRE-ZAMORA, Maryeli et al. Pinus greggii inoculation with the ectomycorrhizal fungi Laccaria laccata enhances native population of plant-growth-promoting rhizobaceria. Biotecnia [online]. 2021, vol.23, n.2, pp.5-10.  Epub 05-Set-2022. ISSN 1665-1456.  https://doi.org/10.18633/biotecnia.v23i2.1302.

The pine-ectomycorrhizal symbiosis is of great ecological importance due to the microbial interaction established in mycorrhizosphere and the favorable edaphic conditions created by the decomposition of organic matter. The objective of this work was to estimate the effect of the ectomycorrhizal fungus Laccaria laccata colonization on the growth of Pinus greggii, as well as the abundance of microorganisms in its roots under greenhouse conditions. For which we used a completely randomized experimental design, composed of two treatments: P. greggii inoculated with L. laccata and control. Microbial metabolic activity (AMM), microbial metabolic diversity, height, dry weight, abundance of nitrogen-fixing and phosphate-solubilizing bacteria were evaluated. By means of ANOVA we observed that, one year after sowing and 6 months after inoculation, L. laccata improved the growth of P. greggii; Furthermore, the AMM increased, but there were no differences in diversity with respect to the control. Also, a greater abundance of phosphate solubilizing and nitrogen fixing bacteria was found in the rhizosphere of the inoculated plants. This suggests that these organisms are favored under the conditions propitiated by the presence of L. laccatta.

Palavras-chave : Pines; Biolog EcoPlates; microbial diversity; phosphate solubilization; nitrogen fixation.

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