Effect of exogenous cytokinin (BAP, 10 mM) (a) and auxin (NAA, 10 mM) (b) on expression of RsCLE2, 19 and 41 genes in upper part of root of Raphanus sativus seedlings. Error bars indicate standard deviation of three technical repeats. (P < 0.05 - *, P < 0.01 - **, P < 0.001 - ***)