1. Department of Horticulture and Crop Science, The Ohio State University, Ohio Agricultural Research and Development Center, 1680 Madison Avenue, Wooster, Ohio 44691; Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota 57007; Department of Chemistry, The Ohio State University—Mansfield, 1760 University Drive, Mansfield, Ohio 44906; and Department of Chemistry, University of Akron, Akron, Ohio 44325