Radioactive meta -carboxytyrosine was synthesized and administered to detached leaves of Reseda odorata, Lunaria annua, Reseda luteola , and to Wedgewood iris ( Iris tingitana X Iris xithium ). Phenylalanine- 14 C was fed similarly. There was a small but significant conversion of meta -carboxytyrosine to 3-carboxy-4-hydroxyphenyl-glycine by iris leaves; the only other leaves that brought about the conversion were R. odorata , and they produced up to four times as much as did iris leaves. Phenylalanine was converted to meta -carboxyphenylalanine by R. odorata and iris.
