Fig. 1.

BRs regulate biomass accumulation in aerial parts of Arabidopsis. (A) Biomass accumulation in aerial parts of BRs mutants at different developmental stages: I, having nine rosette leaves, the stage with vigorous vegetative growth; II, initiation of bolting; III, having one primary inflorescence with four nodes; IV, having three side shoots on the primary inflorescence stalk; V, having two or more secondary inflorescences, the end of plant growth. (B) Cellulose content in primary inflorescence stems of BR-related mutants at stages V. Data represent means (±SE) of four independent experiments. The asterisks indicate significant levels of *P <0.05 and **P <0.01, respectively.