The volatile oil content of cassumunar ginger significantly
decreased when the light intensity was decreased to 50% and
25%. Plants grown in full sunlight gave the highest yield of
volatile oil (15.34 mL/kg) as compared with those grown under
50% (10.13 mL/kg) and 25% light (7.87 mL/kg). The gradual decrease
of volatile oil content with decreasing light intensity may be the
result of a higher rate of photosynthesis in full sunlight than in
low light.