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Anti-ADC immunogold labeling in hop internodes after seven days of culture. (A) Semi-thin section showing divisions in cortical (Ct) and cambial cells (Cb). (B) Ultra-thin section showing cortical cells undergoing division and surrounded by cells undergoing cell death (arrow). (C) Ultra-thin section showing labeling in the cytoplasm (cyt), nucleus (n) and plastids (p). Labeling is absent in vacuoles (v) and golgi vesicles (g). Bars: A = 100 µm; B = 2.5 µm; C = 500 nm.
