The metabolism of C-labeled isatin and anthranilate in pisum stem sections.

Isatin, previously shown to promote growth in green and etiolated pea stems, is converted mainly to anthranilate in those tissues; small quantities of isatate are also formed. Fed anthranilate is converted mainly to its beta-d-glucoside; smaller amounts are metabolized to anthranilamide, tryptophan and kynurenine. These data provide some basis for understanding the growth promoting activity of isatin.