"the popular herbicide glyphosate (Fig. 1c), up-regulated both
cep-1 and
hsp-16.1 at very high concentrations (1,000 and 10,000 mg l-1), whereas expression of cyp-34A9 did not increase even at the highest concentration (p<0.05). By contrast, the
gpx-4 glutathione peroxidase gene showed concentration-dependent up-regulation, which was significant (p<0.05) at 10 mg l-1 and above - well within the range of application doses recommended for spraying on garden weeds."