Allelopathic pathways, isolation and identification of an allelopathic substance from Solidago canadensis L.

作者：Zhang, Dongyu; Ye, Yonghao; Li, Jun; Dong, Liyao^*

来源：Allelopathy Journal, 2014, 33(2): 201-211.

• Allelopathy
• decomposition residue
• leachates
• n-hexadecanoic acid
• radish
• Raphanus sativus
• root exudation
• Solidago canadensis
• Triticum aestivum
• volatiles
• wheat

Solidago canadensis L. is an invasive allelopathic weed in many crops and weeds; however, the mode of release of its allelochemicals are not clear. We studied 4-pathways of allelochemicals release: volatiles, leachates from stems and leaves, root exudation and decomposition of its residue. S. canadensis was used as donor and wheat (Triticum aestivum L.) and radish (Raphanus sativus L.) as recipient plants. Petri dishes with filter paper and sand culture methods were used to study volatiles, leaching from stems and leaves and decomposed residue. The S. canadensis seedlings were grown with 1/4 Hoagland nutrients solution to examine the root exudation. The results suggested that leachates from stems and leaves and decomposed residue of S. canadensis were allelopathic to seed germination and seedling growth of Wheat (Triticum aestivum) and Radish (Raphanus sativus). In addition, an allelopathic substance n-hexadecanoic acid, was isolated and identified from methanol extracts of S. canadensis. This compound inhibited the seedling growth of wheat (Triticum aestivum) and the inhibition increased with concentration.

• 出版日期2014-4
• 单位南京农业大学