Abstract
Coated vesicles occur in differentiating cotton fibres during primary and secondary wall formation. The coated vesicles are often associated with the plasmalemma, or with membranes at the secreting face of dictyosomes, corresponding positionally to GERL. During secondary wall formation the number of dictyosome-associated coated vesicles seems to be smaller than during primary wall formation. When sections are stained for periodateoxidizable polysaccharides (Thiery reaction) the membrane of plasmalemma-associated coated vesicles is intensely stained. The membrane of dictyosome-associated coated vesicles is only weakly stained. On the basis of the present evidence it is not possible to clearly decide, whether the staining in plasmalemma-associated coated vesicles is due to obliquely cut membrane or to vesicle contents. The vesicle coat material is not stained. Possible functions of coated vesicles in differentiating cotton fibres are discussed.
Published Version
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