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. 2014 Mar 21;26(3):1118–1133. doi: 10.1105/tpc.113.121731

Figure 1.

Figure 1.

GA Promotes Trichome Formation in a WD-Repeat/bHLH/MYB Complex–Dependent Manner.

(A) Trichome images of wild-type (WT) Landsberg erecta (Ler), ga1-3, penta (ga1-3 rga gai rgl1 rgl2), and della (rga gai rgl1 rgl2 rgl3) plants treated without (Mock) or with GA3 (GA). The fifth true leaves were selected to count trichome numbers using an environmental scanning electron microscope.

(B) Statistical analysis of total trichome numbers in the fifth true leaves of Ler (WT), ga1-3, Q1 (ga1-3 gai rgl1 rgl2), Q2 (ga1-3 rga rgl1 rgl2), Q3 (ga1-3 rga gai rgl1), Q4 (ga1-3 rga gai rgl2), penta, and della plants treated without (Mock) or with GA3 (GA). Eight leaves for each genotype were used for trichome number measurement in each biological experiment. Data are means (±se) of three biological replicates. Lowercase letters indicate significant differences by one-way ANOVA analysis with SAS software (P < 0.05).

(C) Trichome images of Arabidopsis gl3 egl3, gl1, and ttg1 mutants treated without (Mock) or with GA3 (GA). The fifth true leaves were selected to count trichome numbers. No trichome was observed in gl3 egl3, gl1, and ttg1 mutants.