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首页> 外文期刊>Soil Biology & Biochemistry >Host parasite soil communities and environmental constraints: Modelling of soil functions involved in interactions between plant-parasitic nematodes and Pasteuria penetrans
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Host parasite soil communities and environmental constraints: Modelling of soil functions involved in interactions between plant-parasitic nematodes and Pasteuria penetrans

机译：寄主寄生虫土壤群落和环境限制：涉及植物寄生线虫和巴氏巴斯德氏菌相互作用的土壤功能模型

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摘要

Nematodes belonging to the genus Meloidogyne are the most ubiquitous and widespread plant-parasitic nematodes. They occur worldwide, are polyphagous and can parasitize most cultivated plants leading to reduced crop yields. They are especially harmful in developing countries because of the lack of suitable and feasible management strategies. Among all the control practices (chemicals, physical techniques, cultural practices, resistance), the use of natural enemies as biological control agents is the most recently developed. Pasteuria penetrans which is an obligate Gram-positive, endospore-forming bacterium, is perhaps the most promising plant-parasitic nematode biocontrol agent. Despite much research conducted on prey predator interactions (host parasite specificity, mechanisms of attachment, field efficacy), the influence of the soil environment on host parasite interactions is poorly understood even when the soil appears to be the key factor. Beyond common studies on the influence of climatic conditions on the attachment of endospores of P. penetrans to nematodes, more knowledge about the systemic interactions between plants, soil water dynamics, soil texture and structure, and other biota on the parasitism of nematodes by P. penetrans would improve their utilization as biological control agents. The aim of this review is to analyze the literature dealing with the influence of the soil on nematode P. penetrans interactions in order to suggest a helpful conceptual model based on partitioning the Pasteuria population in sub-populations according to their soil habitat (dispersible and non-dispersible aggregates, microporosity, macroporosity), not all of them being available for attachment and infection on nematodes. Such concerns should be taken into account by epidemiologists for improving biological management strategies based on the use of this bacterium. (c) 2010 Elsevier Ltd. All rights reserved.
机译：属于根结线虫属的线虫是最普遍和广泛分布的植物寄生线虫。它们在全球范围内发生，多食性，可寄生于大多数栽培植物，导致农作物减产。由于缺乏合适和可行的管理策略，它们在发展中国家尤其有害。在所有控制措施（化学，物理技术，文化习俗，抵抗力）中，使用天敌作为生物控制剂是最近开发的。巴斯德氏杆菌巴斯德氏菌是专性的革兰氏阳性，内生孢子形成细菌，可能是最有前途的植物寄生线虫生物防治剂。尽管对猎物与天敌的相互作用（寄主寄生虫特异性，附着机制，田间功效）进行了大量研究，但即使土壤似乎是关键因素，也很少了解土壤环境对寄主寄生虫相互作用的影响。除了关于气候条件对P. penetrans的内生孢子附着到线虫上的影响的常规研究之外，P。还对植物之间的系统相互作用，土壤水分动力学，土壤质地和结构以及其他生物群对线虫的寄生性有更多的了解。 penetrans将改善其作为生物防治剂的利用。这篇综述的目的是分析有关土壤对线虫P.transe相互作用的影响的文献，以便提出一个有用的概念模型，该模型基于巴斯德氏菌种群根据其土壤生境（可分散和不活动的种群）进行分区。 -可分散的聚集体，微孔，大孔），并非所有的聚集体都可用于线虫的附着和感染。流行病学家应考虑到这种担忧，以便基于这种细菌的使用来改善生物学管理策略。 （c）2010 Elsevier Ltd.保留所有权利。

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