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Full-Text Articles in Environmental Microbiology and Microbial Ecology
Sequesteration Of Lead, Cadmium And Arsenic By Lactobacillus Species And Detoxication Potential, Marc A. Monachese
Sequesteration Of Lead, Cadmium And Arsenic By Lactobacillus Species And Detoxication Potential, Marc A. Monachese
Electronic Thesis and Dissertation Repository
Toxic metals are a class of elements with no biological role but with extreme toxicity. On average only 50% of ingested toxins are absorbed into the human body, for reasons still unknown. It was hypothesized that the gut microbiota plays a role in reducing toxin absorbance. The aim of this study was to determine if constituents of the gut, namely Lactobacillus species, are able to sequester arsenic, lead and cadmium from the environment. Lactobacilli were incubated with the metals, both in vitro and with a Caco-2 cell line. Analysis of metal concentrations was conducted to determine if these were reduced …
Colonization Of Zea Mays By The Nitrogen Fixing Bacterium Gluconacetobacter Diazotrophicus, Nikita Eskin
Colonization Of Zea Mays By The Nitrogen Fixing Bacterium Gluconacetobacter Diazotrophicus, Nikita Eskin
Electronic Thesis and Dissertation Repository
To achieve high yields, corn fields are supplemented with nitrogen fertilizers. Nitrogen fertilizers account for a significant portion of production costs, and are harmful to the environment. Gluconacetobacter diazotrophicus, an endophytic nitrogen-fixing bacterium supplies its natural host sugarcane with a significant amount of nitrogen. This study investigated the colonization of G. diazotrophicus in seven different corn genotypes consisting of sweet and grain corn via three different methods of inoculation: soil drench, root dip, and aseptic inoculation. Sucrose content of the corn genotypes and nitrogenase activity were also analysed. Colonization was confirmed by PCR analysis. G. diazotrophicus colonization was detected using …