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Shifts in reclamation management strategies shape the role of exopolysaccharide and lipopolysaccharide-producing bacteria during soil formation.
Microbial Biotechnology ( IF 4.8 ) Pub Date : 2020-01-09 , DOI: 10.1111/1751-7915.13532 Miljenka Vuko 1, 2 , Barbara Cania 1 , Cordula Vogel 3 , Susanne Kublik 1 , Michael Schloter 1, 2 , Stefanie Schulz 1
Microbial Biotechnology ( IF 4.8 ) Pub Date : 2020-01-09 , DOI: 10.1111/1751-7915.13532 Miljenka Vuko 1, 2 , Barbara Cania 1 , Cordula Vogel 3 , Susanne Kublik 1 , Michael Schloter 1, 2 , Stefanie Schulz 1
Affiliation
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Polymeric substances produced by microbes play a key role for the development of soil aggregates. Here, we investigated the dynamics of bacterial families contributing to the formation of exopolysaccharides and lipopolysaccharides, major constituents of polymeric substances, at a managed land reclamation site of a post‐mining area. We collected soil samples from the initial and the agricultural management phase and expected a peak in the abundance of bacteria capable for exopolysaccharide and lipopolysaccharide production at the points of the biggest disturbances. We used shotgun metagenomic sequencing in combination with measurements of exopolysaccharide concentrations. Our results underline the importance of exopolysaccharide and lipopolysaccharide‐producing bacteria after nutrient input combined with structural disturbance events, caused here by the initial planting of alfalfa and the introduction of a tillage regime together with organic fertilization in the agricultural management phase. Moreover, the changes in management caused a shift in the exopolysaccharide/lipopolysaccharide‐producing community. The initial phase was dominated by typical colonizers of oligotrophic environments, specifically nitrogen fixers (Rhizobiaceae, Comamonadaceae, Hyphomicrobiaceae), while bacteria common in agricultural soils, such as Sphingomonadaceae, Oxalobacteraceae and Nitrospiraceae, prevailed in the agricultural management phase.
中文翻译：
复垦管理策略的转变塑造了胞外多糖和产脂多糖细菌在土壤形成过程中的作用。
微生物产生的聚合物对于土壤团聚体的发育起着关键作用。在这里，我们研究了在矿区管理的土地复垦场地中有助于形成胞外多糖和脂多糖（聚合物的主要成分）的细菌家族的动态。我们从初始阶段和农业管理阶段收集了土壤样本，并预计在最大干扰点能够产生胞外多糖和脂多糖的细菌丰度达到峰值。我们使用鸟枪法宏基因组测序结合胞外多糖浓度的测量。我们的结果强调了养分输入与结构扰动事件相结合后胞外多糖和脂多糖产生细菌的重要性，这是由于最初种植苜蓿以及在农业管理阶段引入耕作制度和有机施肥而引起的。此外，管理的变化引起了胞外多糖/脂多糖产生群落的转变。初始阶段以贫营养环境的典型定植菌为主，特别是固氮菌（根瘤菌科、丛毛单胞菌科、丝微菌科），而农业土壤中常见的细菌，如鞘氨醇单胞菌科、草酸杆菌科和硝化螺旋菌科在农业管理阶段占主导地位。
更新日期：2020-01-09
中文翻译：
复垦管理策略的转变塑造了胞外多糖和产脂多糖细菌在土壤形成过程中的作用。
微生物产生的聚合物对于土壤团聚体的发育起着关键作用。在这里，我们研究了在矿区管理的土地复垦场地中有助于形成胞外多糖和脂多糖（聚合物的主要成分）的细菌家族的动态。我们从初始阶段和农业管理阶段收集了土壤样本，并预计在最大干扰点能够产生胞外多糖和脂多糖的细菌丰度达到峰值。我们使用鸟枪法宏基因组测序结合胞外多糖浓度的测量。我们的结果强调了养分输入与结构扰动事件相结合后胞外多糖和脂多糖产生细菌的重要性，这是由于最初种植苜蓿以及在农业管理阶段引入耕作制度和有机施肥而引起的。此外，管理的变化引起了胞外多糖/脂多糖产生群落的转变。初始阶段以贫营养环境的典型定植菌为主，特别是固氮菌（根瘤菌科、丛毛单胞菌科、丝微菌科），而农业土壤中常见的细菌，如鞘氨醇单胞菌科、草酸杆菌科和硝化螺旋菌科在农业管理阶段占主导地位。
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