Endogenous gibberellins (GAs) in the young leaves and xylem sap of tea plants (Camellia sinensis L.) were analyzed by GC-MS. The following GAs were identified by comparing their mass spectra and KRIs with those of authentic specimens: GA9 and GA20 in the leaves; GA9, GA12, GA15, GA20, GA44, GA51 and GA53 in the xylem sap.
