Cellulosic wall component produced by the golgi apparatus of Pleurochrysis scherffelii.
The Golgi apparatus of a marine chrysophycean alga Pleurochrysis scherffelii Pringsheim produces wall fragments (circular-to-ellipsoidal "scales") which are released to the periphery by an exocytotic process involving the fusion of cisternae and the plasma membrane. The cellulosic component of the scales is a complex network of fibrils (10 to 25 angstroms in diameter) that resist treatment with strong alkali. Untreated washed scales yield galactose, ribose, arabinose, and traces of glucose; alkali-purified scales yield much more glucose. The fibrillar scale constituent shows a positive iodine dichroism of the intact wall, a positive zinc chloride-iodine reaction, breakage sites characteristic of highly crystalline cellulose, and solubility in Schweizer's reagent.
D002482:Cellulose / Q000032:analysis*; D056890:Eukaryota / Q000166:cytology*; D006056:Golgi Apparatus / Q000378:metabolism*; D011134:Polysaccharides / Q000032:analysis
D011134:Polysaccharides; D002482:Cellulose