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首页> 外文期刊>Trends in Plant Science >Model systems in ecology: dissecting the endophyte-grass literature
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Model systems in ecology: dissecting the endophyte-grass literature

机译：生态学中的模型系统：解剖内生草文学

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Model systems can facilitate and focus research efforts but ill-chosen or inapt ones can distract or impede scientific progress. In this Opinion article, we pose the question: how can the literature provide appropriate general conclusions if the model systems upon which the literature is based are unrepresentative of the relevant biological diversity? A good example of this problem is the endophyte-grass symbiosis, which is considered to be a classic example of mutualistic interactions. Meta-analysis of the primary literature demonstrates that the conceptual framework for endophyte-grass interactions has largely been based on endophyte-plant-herbivore studies of two agricultural grass species, tall fescue and perennial ryegrass. Consistent with conventional wisdom, the meta-analysis indicates that endophytes slightly increase grass resistance to herbivores. By contrast, endophytes appear not to affect plant performance or competitive ability. The positive effects of endophytes appear to be dependent on genetic variation in the host and endophyte, and on nutrient availability in soils. Thus, the agronomic grass model systems fail to capture the breadth of variability inherent in wild grass-endophyte populations and communities.
机译：模型系统可以促进和集中研究工作，但是选择不当或不适当的系统可能会分散或阻碍科学进展。在这篇观点文章中，我们提出一个问题：如果文献所基于的模型系统不能代表相关的生物多样性，那么文献如何提供适当的一般性结论？一个很好的例子就是内生植物-草共生，它被认为是相互影响的经典例子。对主要文献的荟萃分析表明，内生植物-草相互作用的概念框架主要基于对两种高高羊茅和多年生黑麦草的两种农业草种的内生植物-草食动物研究。与传统观点一致，荟萃分析表明内生植物会稍微增加草对草食动物的抗性。相比之下，内生菌似乎不影响植物性能或竞争能力。内生菌的积极作用似乎取决于宿主和内生菌的遗传变异，以及土壤中的养分利用率。因此，农艺草模型系统无法捕获野草-内生植物种群和群落固有的变异性广度。

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