Summary
The effects of colchicine and cytochalasin B on the structure of dictyosomes of maize root tips were studied. Colchicine did not significantly affect dictyosome structure or change the distribution of dictyosome-derived secretory vesicles. Cytochalasin B did not significantly change dictyosome structure or intercisternal fibers, but did alter markedly the distribution of the secretory vesicles in both the epidermal and outer cap cells. With cytochalasin B, the vesicles accumulated in a region close to their site of formation and did not migrate to the cell surface. The results show that a cytochalasin B-sensitive subcellular component is involved in the vectorial movement of secretory vesicles from sites of formation at dictyosomes to sites of fusion at the cell surface.
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Mollenhauer, H.H., Morré, D.J. Cytochalasin B, but not colchicine, inhibits migration of secretory vesicles in root tips of maize. Protoplasma 87, 39–48 (1976). https://doi.org/10.1007/BF01623957
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DOI: https://doi.org/10.1007/BF01623957