| Title: | Vertical Leaching of Allelochemicals Affecting Their Bioactivity and the Microbial Community of Soil |
| Author(s): | Xiao Z; Le C; Xu Z; Gu Z; Lv J; Shamsi IH; |
| Address: | "College of Environmental and Resource Sciences, double daggerCollege of Biosystems Engineering and Food Science, and section signKey Laboratory of Crop Germplasm Resource, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University , Hangzhou, Zhejiang 310058, People's Republic of China" |
| ISSN/ISBN: | 1520-5118 (Electronic) 0021-8561 (Linking) |
| Abstract: | "Leaching of allelochemicals in soil is one of the fundamental processes that determines allelopathic activities but is often overlooked. In the present study, the vertical leaching of seven putative allelochemicals as well as one pesticide and one herbicide was investigated using polyvinyl chloride columns combined with a bioassay approach. The results indicated that the leachability of pretilachlor and imidacloprid were the best (Lf > 0.8), followed by vanillin and coumarin (Lf > 0.6). The leachability of daidzein, menthol, and m-tyrosine were medium (0.3 < Lf < 0.6). The lowest leachability has been observed on p-coumaric and p-hydroxybenzoic acids (Lf < 0.3). The chemicals were classified into three clusters according to the phospholipid fatty acid profile (i.e., vanillin in one cluster, coumarin and menthol in the second cluster, and the rest in the third cluster). Bioactivities of the chemicals changed dramatically. Germination of lettuce seeds was suppressed by imidacloprid and pretilachlor, and the suppression was concentration-dependent. The bioactivity of most of the allelochemicals were progressively decreased with the downward movement of chemicals. The results indicated that leaching mediated the microbial communities and the interactions of chemical-microorganism and modified the bioavailability of allelochemicals in soil" |
| Keywords: | Bacteria/classification/*drug effects/genetics/isolation & purification Lettuce/drug effects/growth & development Pheromones/chemistry/*pharmacology Seeds/drug effects/growth & development Soil/chemistry *Soil Microbiology Pvc allelochemicals interaction; |
| Notes: | "MedlineXiao, Zhongxiang Le, Chang Xu, Zhenghao Gu, Zhefeng Lv, Junfei Shamsi, Imran Haider eng 2017/08/12 J Agric Food Chem. 2017 Sep 13; 65(36):7847-7853. doi: 10.1021/acs.jafc.7b01581. Epub 2017 Aug 28" |
