Tomato seedlings were grown hydroponically for 2 d after germination and then treated with the indicated concentrations of CO for 4 d. (a) Photograph of tomato lateral root formation. (b) The number of tomato lateral roots (LR) exposed to different concentrations of CO. (c) Change of elongation of tomato primary root (PR) with different levels of CO. Values represent the mean of three independent experiments and vertical bars indicate standard deviations (=45 seedlings). Asterisks indicate that the mean values are significantly different between the CO treatments and controls ( <p><b>Copyright information:</b></p><p>Taken from "Regulation of tomato lateral root development by carbon monoxide and involvement in auxin and nitric oxide"</p><p></p><p>Journal of Experimental Botany 2008;59(12):3443-3452.</p><p>Published online 24 Jul 2008</p><p>PMCID:PMC2529230.</p><p></p
