Fig. 2.

The aln-1 mutant exhibits increased sensitivity to exogenous MeJA. Sterile seedlings of the WT, aln-1 mutant, and the complemented mutant (aln-1 35S:ALN) were grown for 8 d on standard medium supplemented with MeJA and examined for root growth and anthocyanin accumulation. (A) Typical root growth in the presence of 10 µM MeJA. Horizontal bars indicate a scale of 10mm in length (thick) and the position of a primary root tip (thin). (B) Primary root length in the presence of 10 µM and 50 µM MeJA. Data are means ±SE (n≥16). (C) Anthocyanin levels in the presence of 10 µM MeJA. Data are means ±SE (n=8). Asterisks denote significant differences between WT and mutant plants (*P<0.05; **P<0.01; ***P<0.001 by Student’s t-test). (This figure is available in colour at JXB online.)