TY - JOUR
AU1 - Murch, S. J.
AU2 - KrishnaRaj,  S.
AU3 - Saxena,  P. K.
AB - cv. Anthos) is presented. Isotope tracer experiments were performed on plantlets regenerated from thidiazuron-induced stem explants and grown on MS basal medium for 2 months. Radiolabel from 14 C-tryptophan was recovered as 14 C-indoleacetic acid, 14 C-tryptamine, 14 C-5-hydroxytryptophan, 14 C-serotonin and 14 C-melatonin in the treated St. John's wort plantlets. Chromatographic peak identity was confirmed by high performance liquid chromatography-mass spectrometry-mass spectrometry and quantification of melatonin by radioimmunoassay. Significantly more radiolabel was recovered in serotonin relative to melatonin under low light conditions with this ratio being reversed under increased lighting, indicating that the rate of flow through this biosynthetic pathway is regulated, at least in part, by light.
TI - Tryptophan is a precursor for melatonin and serotonin biosynthesis in in vitro regenerated St. John's wort (Hypericum perforatum L. cv. Anthos) plants
JF - Plant Cell Reports
DO - 10.1007/s002990000206
DA - 2000-06-01
UR - https://www.deepdyve.com/lp/springer-journals/tryptophan-is-a-precursor-for-melatonin-and-serotonin-biosynthesis-in-bGyD7zP10r
SP - 698
EP - 704
VL - 19
IS - 7
DP - DeepDyve
ER -