Fig. 3

Characterization of the Pennellii wonderful monster (Pwm) mutant. a Pwm plants cultivated in vitro show extremely curly leaves and develop a very profuse root system. b First leaves of WT (left) and Pwm (right) plants. c-d Fifth leaf of WT (c) and Pwm (d) plants. e Greenhouse-grown plants of Pwm grow very slowly and show extremely curly leaves. f Pwm mutant plant cultivated for 9 months in the greenhouse showing a creeping appearance. g-h The Pwm inflorescence has a compact appearance since flowers develop side by side in the peduncle terminal part. Note the huge number of trichomes in the peduncle. i Unlike what happens in the WT (down), flower development in Pwm is interrupted in the floral bud state (up). j Longitudinal section of WT (left) and Pwm (right) flowers in the floral bud state. k-m Expression analysis of the GUS reporter carried by the enhancer trap. A strong reporter expression is observed in axillary buds from which leaves emerge (k) as well as in petiole and blade of young leaves (l) and rachis (m). Bar = 1 cm