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. 2009 Feb 1;23(3):373–384. doi: 10.1101/gad.497009

Figure 5.

Figure 5.

Apical polarization in the subepidermal layers of the shoot apical meristem. (A) Median longitudinal confocal section through a tomato vegetative meristem expressing AtPIN1:GFP (green). Note apical polarization at incipient primordia (I1, red arrows) toward a convergence point in the L1 (white star) and lateral (red arrow) and basipetal (white arrows) polarization in the initiating midvein of bulging primordia (P1). Red signal is plastid autofluorescence in the L1. (B) AtPIN1 immunolocalization in Arabidopsis vegetative shoot apical meristems. Median longitudinal section through I2 position, showing AtPIN1 apical polarization in subepidermal layers, toward a convergence point in the L1 (white star). (C) Longitudinal section through an older Arabidopsis midvein showing basal (white arrows) and lateral (red arrows) AtPIN1 subcellular localization. Bars, 20 μm.