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Science 14 November 1969:
Vol. 166. no. 3907, pp. 894 - 896
DOI: 10.1126/science.166.3907.894
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Articles

Cellulosic Wall Component Produced by the Golgi Apparatus of Pleurochrysis scherffelii

R. Malcolm Brown Jr. 1, Werner W. Franke 1, Hans Kleinig 1, Heinz Falk 1, and Peter Sitte 1

1 Division of Cell Biology, Institute of Biology II, University of Freiburg i. Br. West Germany

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.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Science. ISSN 0036-8075 (print), 1095-9203 (online)