Current Review: Siderophores in Microbial Interactions on Plant Surfaces. Joyce E. Loper. U.S. Department of Agriculture, Agricultural Research Service, Horticultural Crops Research Laboratory, Corvallis, OR 97330. Jeffrey S. Buyer(2). U.S. Department of Agriculture, Agricultural Research Service, (2)Soil Microbial Systems Laboratory, Beltsville, MD 20705 U.S.A. MPMI 4:5-13. Accepted 21 September 1990. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1991.