Phenotypes of 10-d tomato seedlings upon the treatment of SlCLE motif peptides. (A) Effect of 100 μM concentration of SlCLE10p, 12p and 13p on 10-day old tomato seedling development. (B) Effects of different SlCLE motif peptides on the root length of tomato seedlings. The lengths of the main roots were measured after 10 d of growth on peptide-containing media (n = 25 for each treatment). Data and error bars represent mean ± SD.