Isolation and Identification of Potential Allelochemicals from Aerial Parts of Avena fatua L. and Their Allelopathic Effect on Wheat

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• 作者：Xingang Liu ; Fajun Tian ; Yingying Tian ; Yanbing Wu ; Fengshou Dong ; Jun Xu ; Yongquan Zheng
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2016
• 出版时间：May 11, 2016
• 年：2016
• 卷：64
• 期：18
• 页码：3492-3500
• 全文大小：520K
• 年卷期：0
• ISSN：1520-5118

文摘

Five compounds (syringic acid, tricin, acacetin, syringoside, and diosmetin) were isolated from the aerial parts of wild oats (Avena fatua L.) using chromatography columns of silica gel and Sephadex LH-20. Their chemical structures were identified by means of electrospray ionization and high-resolution mass spectrometry as well as ¹H and ¹³C nuclear magnetic resonance spectroscopic analyses. Bioassays showed that the five compounds had significant allelopathic effects on the germination and seedling growth of wheat (Triticum aestivum L.). The five compounds inhibited fresh wheat as well as the shoot and root growth of wheat by approximately 50% at a concentration of 100 mg/kg, except for tricin and syringoside for shoot growth. The results of activity testing indicated that the aerial parts of wild oats had strong allelopathic potential and could cause different degrees of influence on surrounding plants. Moreover, these compounds could be key allelochemicals in wild-oat-infested wheat fields and interfere with wheat growth via allelopathy.