let's start by taking a look at the tree bark and its reported contents of psycho-active tryptamines.
In samples of six-year-old micropropagated MT in Morelos, Mexico, concentration of DMT in tree bark was found to be significant, particularly during the dry, cool season (0,35% of DMT in january) when compared to the humid, warm season (0,11% in june). The bark of wild trees in Chiapas, México, was reported to have concentrations of 0,2% DMT in the same research, but the season of harvest was not specified (2).
In another study, samples of inner bark stem collected between August and September in several locations in the State of Sergipe, Northeastern Brazil, were analyzed by developing MSPD combined with GC-MS (6). The concentrations found give a mean of 0,31% DMT for inner stem bark samples obtained from humid coastal regions, and 0,58% (ranging from 0,15% to as high as 0,93%) for the samples from semi-arid regions in the same state. This agrees with our findings of apparently high concentration of actives in the stem bark of MT under water stress, and reinforces the correlation between lower humidity levels (either due to season or to regional characteristics) and higher alkaloid yields in the tree bark.