在系统分离鉴定胜红蓟化感物质的基础上,揭示了胜红蓟释放化感物质的途径和环境响应机制。发现营养缺乏、植物竞争和病虫害等自然胁迫因子能使胜红蓟产生化学响应抵御逆境;而面对机械损伤和除草剂等人为胁迫因子则不产生相应的响应机制。证实引种到柑橘园的胜红蓟向土壤中释放 Based on the systematical separation and identification of the allelochemicals of the red thistle, the mechanism and the environmental response mechanism of the red thistle to release the allelochemicals were revealed. It was found that natural stress factors such as nutrient deficiency, plant competition and plant diseases and insect pests could make the chemical response of R. solanacear secrete against adversity. However, there was no corresponding response mechanism to human stress factors such as mechanical damage and herbicide. The red thistle introduced into the citrus orchard proved to be released into the soil