Department of Biology, College of Science, Baghdad University, Baghdad, Iraq.
J Chem Ecol. 1983 Jun;9(6):761-74. doi: 10.1007/BF00988781.
We previously reported thatPolygonum aviculare has a strong allelopathic action againstCynodon dactylon (L.) Pers. and other test species. Moreover, we found that several phenolic compounds appeared to be important allelochemics in this activity. We have now isolated other potential inhibitors fromP. aviculare residues and soil underPolygonum stands, and none of these occurred in soil underC. dactylon stands. GC-MS analysis revealed that these additional inhibitors are long-chain fatty acids with 14-22 carbons. Nine were identified inP. aviculare residues and seven in soil underP. aviculare. Sodium salts of all the identified fatty acids inhibited seedling growth ofC. dactylon and at least some test strains of the nitrogen-fixing bacteria,Azotobacter andRhizobium.
我们之前曾报道过，菰对狗尾草（L.）珀斯和其他测试物种具有强烈的化感作用。此外，我们发现几种酚类化合物似乎是这种活性中的重要化感物质。我们现在已经从菰的残体和菰属植物下的土壤中分离出了其他潜在的抑制剂，而这些抑制剂在狗尾草属植物下的土壤中都没有出现。GC-MS 分析表明，这些额外的抑制剂是具有 14-22 个碳原子的长链脂肪酸。在菰属残体中鉴定出 9 种，在菰属植物下的土壤中鉴定出 7 种。所有鉴定出的脂肪酸的钠盐都抑制了狗尾草幼苗的生长，至少抑制了一些固氮细菌（固氮菌和根瘤菌）的生长。
