Fig. 2.

CK modulates organogenesis via a two-component system. (A) Relative expression of CK primary response genes, A-type ARRs with the increasing CK concentration in the presence of NAA (537 nM). The statistical significance of identified differences in comparison to the absence of exogenous CKs (t test) at alpha 0.05 and 0.01 is designated (* and **, respectively); error bars show SDs. (B) Phenotypes of root-like organs induced by NAA (537 nM) at the increasing CK concentrations in WT (Col-0 and Ws ecotypes) and different single and double CK receptor mutants. All mutants are of Col-0 ecotype except for ahk4 and ahk3 ahk4, which carry ahk4–1 allele from Ws (see Materials and Methods). (Scale bar: 50 μm.)