บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of water stress and post-harvest handling on artemisinin content in the leaves of Artemisia annua L.

Charles, D. J.; Simon, J. E.; Shock, C. C.; Feibert, E. B. G.; Smith, R. M.;

New crops. Proceedings of the Second National Symposium: New crops, exploration, research and commercialization, Indianapolis, Indiana, October 6-9, 1991. Year: 1993 Pages: 640-643 Ref: 10 ref.

1993

บทคัดย่อ

Effect of water stress and post-harvest handling on artemisinin content in the leaves of Artemisia annua L.

A. annua is a highly aromatic herb which has potential value as a source of artemisinin (a secondary metabolite with antimalarial properties) and essential oils. Field trials were conducted in Ontario, Oregon (USA), in 1989 and 1990, to study the effects of water stress, harvest date and postharvest drying techniques on artemisinin concentration in the leaves of A. annua plants (raised in a greenhouse and transplanted on a silt loam at about 4 weeks after sowing). Harvest date had a significant effect on the artemisinin concentration in air-dried leaves, with the highest concentration of 0.15% recorded for the harvest on 26 July. Water stress during the 2 weeks prior to harvest reduced artemisinin concentrations. Among 6 drying techniques (sun, air-dried inside or outside, and forced air heat at 30, 50 or 80 deg C) and 5 durations (0, 12, 24, 36 or 48 h), artemisinin contents were best retained when plants were dried under ambient conditions, compared with forced air, except when dried at 80 deg for the shortest period (12 h).