Total PA titers in tobacco plants. The size of the circles designates the PA values in different organs of the plant. The white portions of circles correspond to the amount of S-PAs, the blue portions to the SH-PAs, and the black portions to the PH-PAs. The size of the circle in the apical meristem corresponds to 3,180 nmol g−1 FW and includes the white, blue, and black portions corresponding, in turn, to 466, 2,590, and 124 nmol g−1 FW, respectively. The sizes of circles (and the respective portions) in the other plant organs are proportionally depicted.