1. Department of Chemistry, Centre de Recherche en Toxicologie de l'Environnement, University of Quebec, Succursale Centre Ville, Case Postale 8888, Montreal, Quebec, Canada H3C 3P8 (P.L., D.K., P.J., D.D., R.P.); and
2. Department of Plant Anatomy, Eötvös University, Puskin Street 11–13, Budapest, H–1088, Hungary (B.B.)