Lloyd Austin W, Percival David, Yurgel Svetlana N
Department of Plant, Food, and Environmental Sciences, Dalhousie University, Truro, NS B2N 5E3, Canada.
Microorganisms. 2021 Jun 23;9(7):1366. doi: 10.3390/microorganisms9071366.
Lowbush blueberries ( sp.) are perennial crops produced throughout eastern Canada and Maine through management of wild populations. Given the constraints of this cropping system, the application of fungicides is critical to reducing disease pressure and ensuring consistent yields. However, as plant health is intertwined with soil health, it is important to consider the impact of fungicides on microbial communities. To understand the effects of fungicides in this context, bacterial and fungal microbial communities from fungicide-treated plots, as well as untreated control plots (UTG) were analyzed using amplicon sequencing. The fungicides, considered collectively as a combined treatment group (CTG), lead to a loss in fungal richness. One family, Clavariaceae, had an increased abundance under prothioconazole relative to UTG. This finding may be significant as taxa in Clavariaceae have been thought to potentially form ericoid mycorrhizae with . Five functional pathways and 74 enzymes differed significantly in relative abundance between CTG and UTG including enzymes associated with soil nutrient cycles. Most notably, enzymes corresponding to the breakdown of halogen-organic compounds had an increased abundance in CTG, suggesting bacterial fungicide degradation. Some enzymes associated with soil nutrient cycles differed significantly, possibly implying changes to nutrient pathways due to fungicide treatment.
矮丛蓝莓（Vaccinium angustifolium Ait.）是通过对野生种群进行管理而在加拿大东部和缅因州各地种植的多年生作物。鉴于这种种植系统的限制，施用杀菌剂对于减轻病害压力和确保稳定产量至关重要。然而，由于植物健康与土壤健康相互交织，因此考虑杀菌剂对微生物群落的影响非常重要。为了了解在这种情况下杀菌剂的影响，使用扩增子测序分析了来自杀菌剂处理地块以及未处理对照地块（UTG）的细菌和真菌微生物群落。这些杀菌剂作为一个联合处理组（CTG）共同考虑，导致真菌丰富度下降。相对于UTG，一个科，即珊瑚菌科，在丙硫菌唑处理下丰度增加。这一发现可能具有重要意义，因为珊瑚菌科中的分类群被认为可能与……形成石楠状菌根。CTG和UTG之间有五条功能途径和74种酶在相对丰度上存在显著差异，包括与土壤养分循环相关的酶。最值得注意的是，与卤代有机化合物分解相对应的酶在CTG中丰度增加，表明细菌对杀菌剂的降解作用。一些与土壤养分循环相关的酶存在显著差异，这可能意味着由于杀菌剂处理而导致养分途径发生变化。
