α‐N‐MALONYL‐D‐TRYPTOPHAN IN SEEDLING WHEAT ROOTS

Summary The most prominent Ehrlich reactor present in the acid ethyl acetate fraction of extracts of seedling wheat roots is identified as α‐N‐malonyl‐D‐tryptophan. This compound is synthesized by roots fed with 14C‐labelled D‐tryptophan. The compound was without a significant effect on the growth of cultured excised wheat roots over the range 3.45 × 10−12 to 3.45 × 10−6 M.