Fig. 5 Effects of putrescine and the polyamine inhibitor, DFMA, on redox status (a) and glutathione reductase activity
(b) during the conversion of PLBs of D. officinale to shoots. Open circle Control, filled circle putrescine 1.5 mM, filled square
DFMA 1.0 mM, open square putrescine ? DFMA. GSH Reduced glutathione, GSSG oxidized glutathione