The Relationships between the Dictyosomes and the Forms of Endoplasmic Reticulum in Plant Cells with Different Export Programs

Publisher Website
Google Scholar
Abstract
The relationship between dictyosomes and the endoplasmic reticulum (ER) in a variety of plant tissues [Zea mays cv. Golden Bantam, Phaseolus vulgaris cv. Canadian Wonder and Dionaea muscipula] was investigated by conventional and high-voltage EM. The Zn I/OsO4 (Z10) technique was used to stain selectively the ER and cisternal membranes. No connections occurred between either the dictyosomes and the cisternal or tubular forms of the ER in the carbohydrate-secreting cells of maize root caps, bean leaf palisade tissue and elongating bean roots. In the protein-secreting gland cells of D. muscipula, connections between the tubular ER and dictyosome cisternae were present across the cisternal stack. Connections between the ER and the plasmalemma of these gland cells were present. The endomembrane concept of plant cells is discussed.