Dependence of root and shoot growth, contentand metabolism of cytokinins from ethylene sensibility of arabidopsis plants

A comparative study of shoot and root growth, cytokinin content and metabolism of wild type Arabidopsis plants (Columbia) and their ethylene insensitive mutants (ETR-1) have been carried out. Ethylene was shown to be able to decrease cytokinin content and therefore to maintain root biomass accumulation. On the contrary, cytokinins influence on this process apparently without involvement of ethylene. The involvement of ethylene signaling in inhibition of root elongation by cytokinins is concluded.