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首页> 美国卫生研究院文献>Pathogens >Soil Chemical Properties Barely Perturb the Abundance of Entomopathogenic Fusarium oxysporum: A Case Study Using a Generalized Linear Mixed Model for Microbial Pathogen Occurrence Count Data
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Soil Chemical Properties Barely Perturb the Abundance of Entomopathogenic Fusarium oxysporum: A Case Study Using a Generalized Linear Mixed Model for Microbial Pathogen Occurrence Count Data

机译：土壤化学性质几乎不会干扰昆虫致病性尖孢镰刀菌的丰度：使用广义线性混合模型的微生物病原菌发生计数数据的案例研究

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Fusarium oxysporum exhibits insect pathogenicity—however, generalized concerns of releasing phytopathogens within agroecosystems marred its entomopathogenicity-related investigations. In a previous study, soils were sampled from Douro vineyards and adjacent hedgerows. In this study, 80 of those soils were analyzed for their chemical properties and were subsequently co-related with the abundance of entomopathogenic F. oxysporum, after insect baiting of soils with Galleria mellonella and Tenebrio molitor larvae. The soil chemical properties studied were organic matter content; total organic carbon; total nitrogen; available potassium; available phosphorus; exchangeable cations, such as K+, Na+, Ca2+, and Mg2+; pH; total acidity; degree of base saturation; and effective cation exchange capacity. Entomopathogenic F. oxysporum was found in 48 soils, i.e., 60% ± 5.47%, of the total soil samples. Out of the 1280 insect larvae used, 93, i.e., 7.26% ± 0.72%, were found dead by entomopathogenic F. oxysporum. Stepwise deletion of non-significant variables using a generalized linear model was followed by a generalized linear mixed model (GLMM). A higher C:N (logarithmized) (p < 0.001) and lower exchangeable K+ (logarithmized) (p = 0.008) were found significant for higher fungal abundance. Overall, this study suggests that entomopathogenic F. oxysporum is robust with regard to agricultural changes, and GLMM is a useful statistical tool for count data in ecology.
机译：尖孢镰刀菌（Fusarium oxysporum）表现出昆虫致病性，但是，人们普遍关注在农业生态系统内释放植物病原体的担心破坏了其昆虫病原性相关研究。在先前的研究中，土壤是从杜罗（Douro）葡萄园和附近的树篱中取样的。在这项研究中，分析了其中的80种土壤的化学特性，随后在用马勒菌和黄粉虫幼虫诱食土壤后，将它们与昆虫病原菌的丰富度相关联。研究的土壤化学性质是有机质含量。总有机碳；总氮有效钾有效磷可交换阳离子，例如K + ，Na + ，Ca 2 + 和Mg 2 + ； pH值总酸度基础饱和度；和有效的阳离子交换能力。在48个土壤中发现了致病性氧化葡萄孢，即总土壤样品的60％±5.47％。在使用的1280只昆虫幼虫中，有93例，即7.26％±0.72％，是由昆虫致病性尖孢镰刀菌杀死的。使用广义线性模型逐步删除非重要变量，然后是广义线性混合模型（GLMM）。发现较高的C：N（对数）（p <0.001）和较低的可交换K + （对数）（p = 0.008）对于较高的真菌丰度具有重要意义。总体而言，这项研究表明，昆虫致病性镰刀菌在农业变化方面很稳健，而GLMM是用于统计生态学数据的有用统计工具。

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