TY - JOUR ID - 2179 TI - Evidence for the direct 2β‐ and 3β‐hydroxylation of [2H2]GA20‐13‐O‐[6′‐2H2]glucoside in seedlings of Phaseolus coccineus JO - Physiol. Plant. PY - 2002 SP - 144-147 AU - Schneider, G. AU - Fuchs, P. AU - Schmidt, J. AU - VL - 116 UR - DO - 10.1034/j.1399-3054.2002.1160202.x AB - [17‐2H2]GA20‐13‐O‐[6′‐2H2]glucoside was synthesized and applied to seedlings of Phaseolus coccineus L. After incubation for 72 h the conjugate metabolites were purified and shown by LC‐ESI‐tandem‐MS and GC‐MS to be [17‐2H2]GA1‐13‐O‐[6′‐2H2]glucoside and [17‐2H2]GA29‐13‐O‐[6′‐2H2]glucoside. This is the first evidence for the conversion of intact GA‐O‐glucosides, and represents an additional metabolic pathway of the gibberellin metabolism in P. coccineus L. The results indicate that intact GA‐O‐glucosides are accepted by 2‐ and 3‐oxidases in the plant. A2 - C1 - Bioorganic Chemistry ER -