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Ultrastructural analysis of the fusion profiles between dense vesicles (DVs) and plasma membrane (PM) in wortmannin-treated developing mung bean seeds. Developing mung bean cotyledons at 16 DAF and 12 DAF were treated with wortmannin then chemically fixed and embedded in Spurr’s resin for EM observations. Panels 1–4 show examples of possible fusion profiles between DVs and the PM. Arrows indicate examples of possible DV–PM fusions. DAF, days after flowering. Scale bars=500 nm.
