...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological research >Comparison of phenolic compounds and the effects of invasive and native species in East Asia: support for the novel weapons hypothesis
【24h】

Comparison of phenolic compounds and the effects of invasive and native species in East Asia: support for the novel weapons hypothesis

机译：东亚酚类化合物的比较以及入侵物种和本土物种的影响：支持新武器假说

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

One prediction of the novel weapons hypothesis (NWH) for the dominance of exotic invasive plant species is that the allelopathic effects of successful invaders will, in general, be more biochemically inhibitory to native species and microbes in invaded regions than the native plants themselves. However, no study has compared biochemical concentrations, compositions, or effects of large numbers of native species to those of large numbers of invasive species. In this context we tested the allelopathic and antimicrobial potentials of nine native plant species and nine invasive species in East Asia by comparing their broad phenolic contents and the effects of extracts made from each of the species on target plants and soil fungi. Three of the invasive species, including Eupatorium rugosum, had higher concentrations of total phenolic compounds than any of the native species, and the mean concentration of total phenolics for invasive species was 2.6 times greater than the mean for native species. Only scopoletin was novel to the invasive species, being found in all of nine invasive species, but not in the native species. More importantly, the effects of the total suites of phenolic compounds produced by invasive species differed from the effects of phenolics produced by natives. Extracts of invasive species reduced radicle growth of the three test plant species by 60-80%, but extracts of native species reduced radicle growth by only 30-50%. Extracts of invasive species reduced shoot growth of the three test species by 20-40%, but the overall effect of native species' extract was to stimulate shoot growth. The antimicrobial activity of invasive species was also significantly higher than that of native species. It should be noted that phenolics are just one component of a plant's potential allelopathic arsenal and non-phenolic compounds are likely to play a role in the total extract effect. For example, extracts of P. americana contained the lowest levels of phenolic compounds, but exhibited the strongest inhibition effect. We could not determine whether the greater inhibitory effects of the extracts from invasive species were due to novel combinations of chemicals or higher concentrations of chemicals, but our results are consistent with the predictions of the NWH.
机译：关于外来入侵植物物种优势的新型武器假说（NWH）的一项预测是，通常，成功入侵者的化感作用将比本地植物本身对生化物种和微生物在被入侵地区的生物化学抑制作用更大。然而，没有研究将大量天然物种的生化浓度，组成或作用与大量入侵物种的生化浓度，组成或作用进行比较。在此背景下，我们通过比较东亚地区9种本地植物物种和9种入侵物种的广泛酚含量以及每种物种提取物对目标植物和土壤真菌的影响，测试了其9种入侵植物的化感和抗菌潜力。包括紫茎泽兰在内的三种入侵物种的总酚类化合物浓度均高于任何本地物种，入侵物种的总酚类平均浓度比本地物种的平均浓度高2.6倍。在九种入侵物种中均发现了臭素对入侵物种而言是新颖的，但在本土物种中却没有发现。更重要的是，入侵物种产生的全部酚类化合物的效果不同于本地人产生的酚类化合物的效果。入侵物种的提取物使三种受试植物的胚根生长减少了60-80％，而天然物种的提取物仅使胚根生长减少了30-50％。入侵物种的提取物使三种受试物种的新芽生长降低了20-40％，但原生物种提取物的总体效果是刺激了新芽的生长。入侵物种的抗微生物活性也显着高于天然物种。应该注意的是，酚类只是植物潜在的化感砷中的一种，非酚类化合物很可能在总提取物中发挥作用。例如，美洲P.的提取物包含最低水平的酚类化合物，但是表现出最强的抑制作用。我们无法确定入侵物种提取物的更大抑制作用是否是由于化学物质的新颖组合或更高浓度的化学物质引起的，但我们的结果与NWH的预测相符。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号