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. 2018 Sep 20;9:1391. doi: 10.3389/fpls.2018.01391

FIGURE 3.

FIGURE 3

Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) of transversal section of representative basal region of stem of tobacco plants grown in high irradiance (A–F; full sunlight; Scale bar = 500 μm) and shade (G–L; 8.5% of sunlight; Scale bar = 100 μm) environments and submitted to distinct gibberellin regimes Control (A,G), GA10 (B,H), GA100 (C,I), PAC (D,J), GA10P (E,K) and GA100P (F,L). Box sections for representative image in details these cell wall thickness (Scale bar for SEM = 20 μm) and (Scale bar for TEM = 2 μm for full sunlight and 1 μm for low light). For abbreviations of treatments, see Figure 1. Arrows indicate details of cell wall of fiber-like cells.