Over a 12-week period, new growth was collected at different intervals
from Camptotheca acuminata trees to determine whether a leaf harvest
strategy would be an efficient means for the production of the alkaloi
d camptothecin, Because camptothecin accumulates in young leaves and b
ecause the harvesting of young tissue stimulates axillary bud outgrowt
h, this strategy increased the harvestable amount of camptothecin from
trees in a nondestructive manner.