Abstract

LEOS-ESCOBEDO, Lucio et al. Rhizobacteria promoting growth and resistance to pathogens in pepper that favor their mycorrhization. Rev. Mex. Cienc. Agríc [online]. 2019, vol.10, n.3, pp.601-614.  Epub Mar 30, 2020. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v10i3.1523.

The success of agricultural production depends on the climate, soil, water and micro-organisms arbuscular mycorrhizal fungi (AMF) and plant growth promoting rhizobacteria (Rpcv). This study consisted in determining the germination of spores of AMF in vitro associated to Rpcv and in greenhouse, evaluation of the growth and damages caused by Phytophthora capsici (P. capsici) in pepper seedlings inoculated with AMF and Rpcv. At 32 days of in vitro germination, it was found that Pseudomona tolasii P-61 and Bacillus pumilus R-44, promoted the germination of Rhizophagus intraradices, Jalapa I and Cedro spores up to 60% while the spore germination without Rpcv was of 11.66%. In the greenhouse phase, the percentage of mycorrhizal colonization was greater in the treatment of AMF+Bpcv with respect to the treatment only with AMF. The height, the thickening of the stem, the dry weight of the plant and the root volume, were greater with the inoculation of AMF+Bpcv compared with the inoculation of AMF and the control without inoculation. In the resistance of plants to the attack of P. capsici, it was found that at 84 ddt the inoculation treatment AMF+Bpcv, presented 4.84% of dead plants, AMF 11.21% and the control 4.24%. (194 words)

Keywords : AMF spores; greenhouse; in vitro; pepper genotypes; rhizobacteria.

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