Generation of RNAi-<i>AtTOR</i> transgenic lines.

<p><b>A</b> Total RNA was extracted from 7-day-old WT and five independent RNAi-<i>AtTOR</i> lines, RNAi-1 to RNAi-5, followed by RT-PCR analysis. 18S was used as a loading control. <b>B</b> The root length of 10-day-old WT, RNAi-2, RNAi-3 seedlings was measured on both MS medium and MS medium lacking nitrogen (MS-N). <b>C</b> The fresh weight of WT, RNAi-2, RNAi-3 seedlings grown on MS medium was measured at the stated times. *** indicates P<0.001; ** indicates P<0.01 and * indicates P<0.05. Error bars indicate standard error.