Current Review Molecular Genetics of Extracellular Polysaccharide Biosynthesis in Vascular Phytopathogenic Bacteria. D. L. Coplin. Department of Plant Pathology, The Ohio State University, Columbus 43210-1087. D. Cook(2). (1)Department of Plant Pathology, The Ohio State University, Columbus 43210-1087, and (2)Department of Plant Pathology, University of Wisconsin, Madison 53706 U.S.A. MPMI 3:271-279. Accepted 3 July 1990. Copyright 1990 The American Phytopathological Society.