Half-lives and field soil concentrations of Alliaria petiolata secondary metabolites
Half-lives and field soil concentrations of Alliaria petiolata secondary metabolites
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DOI：
10.1016/j.chemosphere.2009.02.020
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发表时间：
2009-06-01
期刊：
影响因子：
8.8
通讯作者：
Cipollini, Don
中科院分区：
文献类型：
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作者：
Barto, E. Kathryn;Cipollini, Don
有柄蒜的化感作用潜力在实验室中已经得到了很好的证实，但这些过程在自然环境中的重要性仍然存在疑问，部分原因是我们对所谓的化感化合物的稳定性知之甚少。我们测定了几种由A. petiolata在无菌和非无菌土壤在两个温度。我们还试图定量的硫代葡萄糖苷和黄酮苷的水平产生的A。petiolata，在田间土壤中。黄酮苷在非灭菌土壤中的半衰期为3 ~ 12 h。即使在无菌土壤中，最长半衰期也仅为45.5 h。A. petiolata检测散装土壤提取物。在9个月的仿生土壤提取过程中，仅检测到一种化合物，异牡荆素-6“-O-β-D-吡喃葡萄糖苷。这些极低的场水平和较短的半衰期表明，A.有叶柄的植物的死亡可能是由于植物产生的化合物的降解，或其他未知的机制。(C)2009爱思唯尔有限公司保留所有权利。
The allelopathic potential of Alliaria petiolata is well established in the lab, but questions remain about the importance of these processes in natural settings, partly because we know so little about the stability of the purported allelopathic compounds. We determined the half-lives of several flavonoid glycosides produced by A. petiolata in sterile and non-sterile soil at two temperatures. We also attempted to quantify the levels of the glucosinolates and flavonoid glycosides produced by A. petiolata, in field soils. The flavonoid glycosides had half-lives in non-sterile soil ranging from 3 to 12 h. Even in sterile soil the longest half-life was only 45.5 h. None of the glucosinolates or flavonoid glycosides produced by A. petiolata were detected in bulk soil extracts. Only one compound, isovitexin-6 ''-O-beta-D-glucopyranoside, was detected during nine months of biomimetic soil extraction. These very low field levels and short half-lives suggest that the allelopathic effects of A. petiolata are likely either due to degradates of the compounds produced by the plant, or to other unknown mechanisms. (C) 2009 Elsevier Ltd. All rights reserved.