Comparative Study of Ovatifolin Antioxidant and Growth Inhibition Activities

详细信息    查看全文

• 作者：C. L. Cespedes ; M. Hoeneisen ; M. Bittner ; J. Becerra ; and M. Silva
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2001
• 出版时间：September 2001
• 年：2001
• 卷：49
• 期：9
• 页码：4243 - 4251
• 全文大小：128K
• 年卷期：v.49,no.9(September 2001)
• ISSN：1520-5118

文摘

A comparative study on the effect of arturin (1), ovatifolin (3), deacetylovatifolin (5), and their1-acetoxyarturin (2), 8-acetoxyovatifolin (4), 1,10-epoxyovatifolin (6), and 11,13-dihydroovatifolin(7) derivatives, isolated from Podanthus ovatifolius and Podanthus mitiqui, on the seedling growth,germination, and respiration of several monocot and dicot weedy target species was carried out. Inaddition to the inhibitory activity on the bleaching of crocin induced by alkoxyl radicals, thesecompounds also displayed scavenging properties toward DPPH in TLC autographic and spectrophotometric assays. The results indicate that ovatifolin (3), deacetylovatifolin (5), epoxyovatifolin(6), dihydroovatifolin (7), and the CH₂Cl₂ extract interfere with pre-emergence of seedlings at thelevel of respiration. These compounds appear to have selective effects on the radicle and shoot growthof Physalis ixocarpa and Trifolium pratense. Their allelopathic effects are comparable to those ofparthenolide, a know natural growth inhibitor.Keywords: Podanthus ovatifolius; P. mitiqui; ovatifolin; germacrane; sesquiterpene lactone;Asteraceae; phytogrowth inhibition; seed respiration; radical scavengers; DPPH