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They noted: "[S]everal studies have demonstrated that microbial activity and/or biomass can be stimulated following application of some glyphosate formulation to ﬁeld soil." This may be explained by the fact that glyphosate-tolerant species of fungi use glyphosate as a source of 'food,' utilizing available phosphate or amine structures that result from its metabolic breakdown. Indeed, previous studies indicate glyphosate can be used by fungal strains as a "nutriment" and "energy substrate."  
The Toxicological Nightmare of GM Food Grows Darker
A major implication of the study is that there exists a synergism between glyphosate (Roundup) and soil-borne pathogens, which would lead to increased susceptibility to and severity of disease in glyphosate-treated plants. Not only would Roundup-ready corn contain residues of highly toxic glyphosate, its 'inactive' yet still highly toxic ingredients (surfactants), and metabolites (AMPA), but it would also be more likely to contain aflatoxins – taken together, represent a veritable nightmare of synergistic toxicities, whose sum harms no regulatory agency yet adequately accounts for.
The researchers conclude their paper with a cautionary note: "This situation suggests that quantitative changes could occur in these fungi population in the soil exposed to longtime action of this xenobiotic. The survival of these microorganisms, capable to adapt to different glyphosate concentration represents a toxicological risk..."
When one takes into account recent research that Roundup herbicide contributes to the suppression of beneficial lactic-acid producing gut bacteria, while enhancing some of the most deadly known to man, e.g. Clostridium botulinum (1 kilogram (2.2 lbs) would be enough to kill the entire human population), the days of casually classifying the ever-expanding numbers of anti- or non-GMO supporters and activists as alarmists, or GM food itself as "substantially equivalent" to non-GM food, are over. Those who continue to toe Biotech's party-line, under the much maligned banner of checkbook "Science," and in face of clear evidence against its safety, will increasingly be perceived as morally, financially and even legally liable for the damages being caused to exposed populations.
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 Reuters.com, Tate & Lyle says aflatoxin in U.S. corn complicates grain sourcing, Nov. 2012
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