Synthetic CLE peptide treatments of Pinus radiata seedlings. Seedlings were either mock-inoculated (water, no peptide) (A), CLE13 (B,F), CLE41 (C,G), or both CLE13 and CLE41 combined (D,H). Peptide inoculations were with 10 μM (1X) peptide(s) (B,C,D), or 100 μM (10X) (F,G,H) peptide(s). E. Plot of average root lengths observed in A-D, F-H, with corresponding lettering. Error bars represent the standard deviations.