Department of Agricultural Chemistry Faculty of Agriculture, Hokkaido University, Kitau, 060, Sapporo, Japan.
J Chem Ecol. 1992 Nov;18(11):1941-54. doi: 10.1007/BF00981918.
The ethyl acetate extracts ofRorippa indica Hiern. contained hirsutin, arabin, camelinin, and three novel ω-methylsulfonylalkyl isothiocyanates (n=8, 9, and 10). These compounds severely inhibited lettuce (Lactucasaliva) hypocotyl and root growth at 0.1 mM or above. The precursor glucosinolates of hirsutin, arabin, and camelinin were isolated. Presence of the three ω-methylsulfonylalkylglucosinolates, along with other glucosinolates in the roots were verified by the isolation and identification of their desulfoderivatives. Using the continuous root exudate trapping apparatus and GC-MS, hirsutin and the threeω-methlylsulfonylalkyl isothiocyanates were detected in the root exudates ofR. indica, suggesting that these isothiocyanates are the primary candidate of allelopathic compounds contributing to the aggressiveness of this cruciferous weed.
独行菜的乙酸乙酯提取物中含有岩藻糖、阿拉伯糖、骆驼宁和三种新型的ω-甲基磺酰基烷基异硫氰酸酯（n=8、9 和 10）。这些化合物在 0.1mM 或以上浓度时，严重抑制了莴苣（生菜）下胚轴和根的生长。分离得到了岩藻糖、阿拉伯糖和骆驼宁的前体硫代葡萄糖苷。通过分离和鉴定它们的脱硫衍生物，证实了这三种ω-甲基磺酰基烷基硫代葡萄糖苷以及根中的其他硫代葡萄糖苷的存在。利用连续根分泌物捕集装置和 GC-MS，在独行菜的根分泌物中检测到了岩藻糖和三种ω-甲基磺酰基烷基异硫氰酸酯，这表明这些异硫氰酸酯是导致这种十字花科杂草具有侵略性的主要化感化合物候选物。
