Additional file 2.

Adobe Photoshop, Model of the transcription factor network that controls trichome formation in Arabidopsis. TTG1, GL3/EGL3 and GL1 form an activator complex, to regulate the transcription of GL2, and some of the single repeat MYB genes. Single MYB transcription factors, in turn, compete with GL1 for binding of GL3/EGL3, thus limiting the formation of the TTG1-GL3-GL1 activator complex. As shown in this study, TCL2 can intact with GL3, it can also suppress the expression of GL1, thereby limiting the transcriptional activity of the TTG1-GL3-GL1 activator complex. Like that of TCL1, transcription of TCL2 is regulated by SPLs, however, unknown co-activator may required for the transcriptional activation. Question marks indicate unknown regulators or unclear processes.

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Gan et al. BMC Plant Biology 2011 11:176   doi:10.1186/1471-2229-11-176