Open Access

ARTICLE

Bacterial diversity in roots of conventional and genetically modified hybrid maize

by Vital López L, MA Cruz Hernández, S Fernández Dávila, A Mendoza Herrera

Centro de Biotecnología Genómica-Instituto Politécnico Nacional, Laboratorio de Interacción Planta-Microorganismo, Boulevard del Maestro s/n Esq. Elías Piña, Col. Narciso Mendoza, C.P. 88730 Cd. Reynosa, Tamaulipas, México Tel y Fax: 01(899) 925-1656 y 925-3996.

* Corresponding Author:Address Correspondence to: Alberto Mendoza Herrera, e-mail :

Phyton-International Journal of Experimental Botany 2015, 84(1), 233-243. https://doi.org/10.32604/phyton.2015.84.233

Abstract

Cultivated surfaces of genetically modified (GM) crops increased year by year, becoming in 2012 more extensive in developed than in industrialized countries. Furthermore, it has been postulated that the plant is which leads to the selection of the microorganisms on its root exudates, creating specific conditions which in turn regulate the specific microbial structure of each plant. In this study, our main objective was to examine whether the introduction of transgenic maize herbicide-tolerant plants will impact the microbial structures that inhabit at the rhizosphere and rhizoplane with respect to conventional hybrid maize plants. Bacterial populations were determined (CFU/g) using four different semi-selective media. The bacterial genera isolated from the rhizoplane and rhizosphere were identified by sequencing its 16S ribosomal DNA. Although minor differences were found in bacterial populations, our results indicated that there was not a strong change of the microorganisms populations that interact at the rhizosphere of an either conventional hybrid or genetically modified maize. However, we found some bacteria that were only isolated in the either genetically modified [Chryseobacterium sp. (4.39%) and Micrococcus sp. (3.72%)] or conventional maize [Sphingobium sp. (13.17%) and Microbacterium sp. (14.81%)].

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