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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Role of allelopathy of Phragmites australis in its invasion processes
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Role of allelopathy of Phragmites australis in its invasion processes

机译：芦苇化感作用在其侵袭过程中的作用

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Allelopathy is one of the mechanisms that help to explain the invasion success of some plant species. Invasion of Phragmites australis through allelopathy is not robust enough to provide reliable information that could integrate the existing knowledge to sound on-ground reality. This study analysed the chemical characteristics of soil and water and monitored both over four seasons taking into consideration the phenological cycle of P. australis in the field. A series of bioassays has been conducted to test phytotoxicity using field concentrations of allelochemicals on different plant species in laboratory. Significant changes in soil and water chemistry were observed in invaded area compared to uninvaded area. Soil-water (rhizosphere and surface) and whole plant-leachate significantly inhibited germination and alpha-amylase activity of Lactuca sativa as well as the adventitious root formation of Phaseolus aureus. Seasonal impact on allelopathic interference of P. australis in terms of germination and growth of L. sativa, Melaleuca ericifolia, and Poa labillardierei showed distinct but inconsistent variation. Soil biota played an important role in reducing the phytotoxicity in natural soil. In addition, P. australis infested soil showed a lower arbuscular mycorrhizal fungus inoculum potential in terms of Zea mays roots colonization. A synthesis from field studies and associated laboratory experiments may provide a more logical understanding towards invasion mechanisms of P. australis through allelopathy, leading to more realistic management decisions. (C) 2016 Elsevier B.V. All rights reserved.
机译：化感作用是有助于解释某些植物入侵成功的机制之一。通过化感作用侵袭南方芦苇不足以提供可靠的信息，这些信息可以将现有知识整合到合理的地面现实中。这项研究分析了土壤和水的化学特征，并在四个季节内对两个季节进行了监测，并考虑了野外野菜的物候周期。在实验室中，已经进行了一系列生物测定，以使用现场化学物质对不同植物物种上的化感物质进行植物毒性测试。与未入侵区域相比，入侵区域的土壤和水化学变化显着。土壤水（根际和地表）和整个植物浸出液显着抑制了紫花苜蓿的发芽和α-淀粉酶活性以及金黄色菜豆的不定根形成。季节变化对南美白对虾的化感作用的影响，从L. sativa，Mellaleuca ericifolia和Poa labillardierei的发芽和生长表现出明显但不一致的变化。土壤生物群在减少天然土壤的植物毒性中起着重要作用。此外，就玉米根的定殖而言，侵染澳大利亚土壤的土壤显示出较低的丛枝菌根真菌接种物潜力。野外研究和相关实验室实验的综合结果可能会提供更合理的理解，以了解化感作用对南方疫病的侵袭机制，从而导致更现实的管理决策。 （C）2016 Elsevier B.V.保留所有权利。

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