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Golgi vesicles of uncommon morphology and wall formation in the red alga,Polysiphonia

Golgi vesicles of uncommon morphology and wall formation in the red alga,Polysiphonia

Authors :
Eva Konrad Hawkins
Source :
Protoplasma. 80:1-14
Publication Year :
1974
Publisher :
Springer Science and Business Media LLC, 1974.

Abstract

Golgi bodies of immature carposporangia ofPolysiphonia sp. are composed of a polarized stack of six to ten curved cisternae. The cisternae are surrounded by 50–200 nm diameter slightly granular vesicles. Hypertrophied, fibrillar Golgi cisternae occur in mature carposporangia. Secretory vesicles originate from ends of cisternae and by complete vesiculation of terminal cisternae; 0.6–1.2 μm diameter, fibrous vesicles, many with electron dense nucleoids are abundant throughout the cytoplasm of mature sporangia. Vesicles expand, fuse with each other and cluster around starch granules. Some vesicles secrete their content into the spore wall. Morphological analyses of starch granules as well as topographical relations between vesicles, starch granules and the adjacent cytoplasm suggest that these Golgi vesicles function like lysosomes. The significance of these observations is discussed in relation to the composition of plant cell walls and cellular expansion.

Details

ISSN :
16156102 and 0033183X
Volume :
80
Database :
OpenAIRE
Journal :
Protoplasma
Accession number :
edsair.doi.dedup.....2c9a3161d67f81d7134d7efbe7819382
Full Text :
https://doi.org/10.1007/bf01666347