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Transmission electron micrographs of tomato pedicel and localization of polygalacturonase (PG) in abscission zone cells by immunogold labeling (proximal end, 24 h). (a) and (b): cortex; (c) and (d): vascular region; (e) and (f): vacuole; (g) and (h): cell nucleus; (b), (d), (f), and (h) are enlarged photos for the rectangles region in (a), (c), (e), and (g), respectively.
