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2Laboratorio de Fisiología Vegetal, Departamento de Botánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México City 11340, México
The most evident effects of toxic compounds on plants are the inhibition of seed germination and root growth. Microorganisms and chelating agents are two viable options to assist phytoextraction of heavy metals. This study analyzed the effect of bacterization of carpet grass (Axonopus affinis) seeds with a plant growth promoting rhizobacteria and EDTA on germination and seedlings response in presence of cadmium. The analysis done of Axonopus affinis by its morphological determinations showed that the effect of these assisted phytoextraction agents someway inhibited and/or promoted the first stage of development in this plant species; these results demonstrated that the presence of rhizobacteria maintained the growth of seedlings and tolerated the presence of the metal, including the adverse effects of EDTA; suggesting a synergistic effect between microorganism and plant species tested.