title: Soil transformation of 2(3H)-benzoxazolone of rye into phytotoxic 2-amino-3H-phenoxazin-3-one.
abstract: Nonsterile soil transforms the rye metabolite 2(3H)-benzoxazolone (BOA) into 2-amino-3H-phenoxazin-3-one, which is an order of magnitude more toxic to barnyard grass than benzoxazolone. Benzoxazolone was recovered unchanged from sterile soil. However,o-aminophenol is converted to aminophenoxazinone by both sterile and nonsterile soil in the presence of air. Aminophenoxazinone is probably produced by microbial hydrolysis of benzoxazolone intoo-aminophenol, which is oxidized to aminophenoxazinone in both sterile and nonsterile soil. No 2,2'-oxo-1,1'-azobenzene was found in any incubations of soil with benzoxazolone,o-aminophenol, oro-azophenol.
authors.affiliation: Department of Botany, North Carolina State University, Box 7612, 27695-7612, Raleigh, North Carolina.
authors.forename: R W
authors.initials: RW
authors.lastname: Gagliardo
authors.forename: W S
authors.initials: WS
authors.lastname: Chilton