Page 468 - Applied Pharmacognosy
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Examples of the ontogenetic variation of some metabolites
Examples Ontogenetic variation
Volatile oils of Mentha piperita
High proportion of pulegone in young
plants; replaced by menthone and menthol
as leaves mature.
Alkaloids of Papaver somniferum Morphine content of capsule is highest
2 – 3 weeks after flowering; but the other
alkaloids (codeine, thebaine, narcotine &
papaverine) reach their maxima somewhat
earlier.
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