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首页> 外文期刊>Plant and Soil >Assessment of the relationship between geologic origin of soil, rhizobacterial community composition and soil receptivity to tobacco black root rot in Savoie region (France)
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Assessment of the relationship between geologic origin of soil, rhizobacterial community composition and soil receptivity to tobacco black root rot in Savoie region (France)

机译：评估萨瓦省（法国）土壤的地质成因，根瘤菌群落组成与土壤对烟黑根腐病的敏感性之间的关系

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In Morens (Switzerland), soils formed on morainic deposits (which contain vermiculite clay and display particular tobacco rhizobacterial community) are naturally suppressive to Thielaviopsis basicola-mediated tobacco black root rot, but this paradigm was never assessed elsewhere. Here, we tested the relation between geology and disease suppressiveness in neighboring Savoie (France). Two morainic and two sandstone soils from Savoie were compared based on disease receptivity (T. basicola inoculation tests on tobacco), clay mineralogy (X-ray diffraction), tobacco rhizobacterial community composition (16S rRNA gene-based taxonomic microarray) and phlD (+) Pseudomonas populations involved in 2,4-diacetylphloroglucinol production (real-time PCR and tRFLP). Unlike in Morens, in Savoie the morainic soils were receptive to disease whereas T. basicola inoculation did not increase disease level in the sandstone soils. Vermiculite was not present in Savoie soils. The difference in rhizobacterial community composition between Savoie morainic and sandstone soils was significant but modest, and there was little agreement in bacterial taxa discriminating soils of different disease receptivity levels when comparing Morens versus Savoie soils. Finally, phlD (+) rhizosphere pseudomonads were present at levels comparable to those in Morens soils, but with different diversity patterns. The morainic model of black root rot suppressiveness might be restricted to the particular type of moraine occurring in the Morens region, and the low disease receptivity of sandstone soils in neighboring Savoie might be related to other plant-protection mechanisms.
机译：在莫雷恩斯（瑞士），在沉积层上形成的土壤（含有ver石粘土，并显示出特定的烟草根瘤菌群落）自然抑制了巴氏杆菌介导的烟草黑根腐烂，但这种模式从未在其他地方进行过评估。在这里，我们测试了邻近的萨瓦省（法国）的地质与疾病抑制之间的关系。根据疾病的接受性（烟草对巴氏杆菌的接种试验），粘土矿物学（X射线衍射），烟草根瘤菌群落组成（基于16S rRNA基因的分类芯片）和phlD（+），比较了萨瓦省的两种土壤和两种砂岩土壤。 ）参与2,4-二乙酰基间苯三酚生产的假单胞菌种群（实时PCR和tRFLP）。与莫恩斯不同，在萨瓦省，多雨的土壤易受疾病的侵害，而接种基础伯氏菌并没有增加砂岩土壤的病害水平。萨瓦省土壤中不存在石。萨摩亚土壤和砂岩土壤之间的根瘤菌群落组成差异显着但适中，并且在比较莫伦斯土壤与萨瓦伊土壤时，区分不同疾病接受水平的细菌分类群土壤几乎没有一致性。最后，phlD（+）根际假单胞菌的存在水平可与莫伦斯土壤中的水平相当，但具有不同的多样性模式。黑根腐烂抑制的分子模型可能仅限于莫恩斯地区发生的特定类型的冰ora，而邻近萨瓦省的砂岩土壤对病害的低接受性可能与其他植物保护机制有关。

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