Abstract

RIOS ROCAFULL, Y. et al. The culture medium effect in plant growth promotion activity of Gluconacetobacter diazotrophicus in carrot and sugar beet. Revista bio ciencias [online]. 2019, vol.6, e470.  Epub Oct 02, 2020. ISSN 2007-3380.  https://doi.org/10.15741/revbio.06.e470.

For Gluconacetobacter diazotrophicus cultivation have been used different media, but a few researches shows the changes in the plant growth promoting traits of this microorganism. The aim of this work was to evaluate in vitro and in vivo conditions the effect of five culture media in plant growth promotion activity of this bacterium in carrot and sugar beet. The bacterium concentration after 48 hours of fermentation in a shaker was 1012 CFU.mL-1 in all media. After the fermentation process, the bacterium has stable growth in culture medium without combine nitrogen; but it has difference in the solubilization halo in NBRIP medium, indicating the affectation of phosphorous solubilisation ability. The effect of final fermentation products application over carrot and sugar beet also depend of the medium used for microorganism growth. Media like SG and SYP where better for the action over lives and MA medium (rice) was better in the action over root in both vegetables species. The results show the influence of culture medium in plant growth promotion activities of G. diazotrophicus in carrot and sugar beet.

Keywords : Gluconacetobacter diazotrophicus; bioproduct; metabolism.