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

FIGURE 2.

FIGURE 2

Fluorescence microscopy of cross section of basal region of representative stem of tobacco plants grown in high irradiance (A–F; full sunlight) and shade (G–L; 8.5% of sunlight) environments and submitted to distinct gibberellin regimes. Scale bar = 100 μm. 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 fibers (Scale bar = 50 μm). For abbreviations of treatments, see Figure 1. Stained by safranin and astra blue in fluorescence microscopy under excitation violet light (400 nm).