Department of Agricultural Chemistry, Faculty of Agriculture, Hokkaido University, 060, Sapporo, Japan.
J Chem Ecol. 1992 May;18(5):683-91. doi: 10.1007/BF00994606.
Both the neutral and acidic fractions of the acetone extract of yellow fieldcress (Kireha-inugarashi,Rorippa sylvestris Besser) inhibited lettuce seed germination. Salicylic,p-hydroxybenzoic, vanillic, and syringic acid were identified in the acidic fraction. In the neutral fraction, hirsutin (8-methylsulfinyloctyl isothiocyanate), 4-methoxyindole-3-acetonitrile, and pyrocatechol were identified. Bioassay using a root exudate recirculating system showedR. sylvestris during flowering inhibited the lettuce seedling growth. Hirsutin (13μg/plant/day) and pyrocatechol (9.3μg/plant/day) were the major compounds released into the rhizosphere. Several combinations of pyrocatechol,p-hydroxybenzoic acid, vanillic acid, and hirsutin reduced lettuce seedling growth. These compounds seemed to be allelochemicals.
黄花山芥丙酮提取物的中性和酸性部分均抑制了莴苣种子的萌发。在酸性部分鉴定出了水杨酸、对羟基苯甲酸、香草酸和丁香酸。在中性部分鉴定出了毛叶亭（8-甲亚磺酰基辛基异硫氰酸酯）、4-甲氧基吲哚-3-乙腈和邻苯二酚。利用根分泌物循环系统进行的生物测定表明，开花期的山芥抑制了莴苣幼苗的生长。毛叶亭（每天每株 13μg）和邻苯二酚（每天每株 9.3μg）是释放到根际的主要化合物。邻苯二酚、对羟基苯甲酸、香草酸和毛叶亭的几种组合降低了莴苣幼苗的生长。这些化合物似乎是化感物质。
