Fig. 2. Phenotypic characterisation of wild-type and atscar mutant plants. (A) Leaf overview of the mutant SALK-039449. (B) Leaf overview of the mutant SALK-124023. (C) Wild-type leaf. (D,E) Trichomes on leaves of the mutant SALK-039449 and SALK-124023, respectively. The mutants have slightly distorted trichomes and the branches are not regularly arranged as can be seen by the larger distance between the two branching points. (F) Wild-type trichome. (G,H) Dark-grown hypocotyl of the mutants SALK-039449 and SALK-124023, respectively. Some cells are disconnected from their neighbouring cells and bend outwards. (I) Dark grown wild-type hypocotyl. (J,K) 8-day-old dark-grown seedlings of the mutant SALK-039449 and SALK-124023, respectively. The seedlings already show developed petioles, cotyledons, and the first pair of true leaves. Note the long petioles. (L) 8-day-old dark-grown wild-type seedlings. (M) Overview of rosette leaves of the atscar2; atscar4 double mutant. (N) Overview of rosette leaves of the atscar4 single mutant. (O) Trichome of the atscar2; atscar4 double mutant displaying the distorted phenotype. (P) Trichome of the atscar4 single mutant. (Q) Measurements of the distance between the lower and upper branch point of trichomes. Only atscar2 mutants show differences to wild type. Scale bars: 1 mm in L, M and N; 0.4 mm in O; 0.2 mm in P.