2,6-二氯苯甲酰胺降解氨杆菌属的种间相互作用。MSH1 与常驻沙滤菌：改善 BAM 矿化活动的相互合作相互作用的适应症,Environmental Science & Technology

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2,6-二氯苯甲酰胺降解氨杆菌属的种间相互作用。MSH1 与常驻沙滤菌：改善 BAM 矿化活动的相互合作相互作用的适应症
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2022-01-04 , DOI: 10.1021/acs.est.1c06653
Johanna Vandermaesen ₁ , Siyao Du ₁ , Aisling J Daly ₂ , Jan M Baetens ₂ , Benjamin Horemans ₁ , Bernard De Baets ₂ , Nico Boon ₃ , Dirk Springael ₁

Affiliation

生物强化通常涉及入侵过程，需要在目标环境的常驻社区中建立和活动外来微生物。与常驻微生物的相互作用，无论是对抗性的还是合作性的，都被认为会影响入侵。然而，很少有研究检查入侵者与其目标环境的常驻物种之间相互作用的可变性，并且没有一项研究将其视为生物修复背景。氨杆菌属sp。MSH1 矿化地下水微污染物 2,6-二氯苯甲酰胺 (BAM)，被提议用于饮用水生产中使用的砂滤器的生物强化，以避免 BAM 污染。我们研究了沙子微观世界中双重和三重物种组合中 MSH1 和 13 沙滤器常驻细菌之间相互作用的性质。居民影响了 MSH1 介导的 BAM 矿化，但并不总是影响 MSH1 细胞密度，这表明对细胞生理学的影响而不是对细胞数量的影响。剥削性竞争解释了大部分影响（70%），但也发现了干扰竞争的迹象。两个居民改善了双物种集合中的 BAM 矿化，显然是在相互合作中，并否决了其他人在三物种系统中的负面影响。结果表明，沙滤群落包含增加 MSH1 适应度的物种。这为通过与源自并适应目标环境的“辅助”细菌共同接种来协助生物强化打开了大门。

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Interspecies Interactions of the 2,6-Dichlorobenzamide Degrading Aminobacter sp. MSH1 with Resident Sand Filter Bacteria: Indications for Mutual Cooperative Interactions That Improve BAM Mineralization Activity

Bioaugmentation often involves an invasion process requiring the establishment and activity of a foreign microbe in the resident community of the target environment. Interactions with resident micro-organisms, either antagonistic or cooperative, are believed to impact invasion. However, few studies have examined the variability of interactions between an invader and resident species of its target environment, and none of them considered a bioremediation context. Aminobacter sp. MSH1 mineralizing the groundwater micropollutant 2,6-dichlorobenzamide (BAM), is proposed for bioaugmentation of sand filters used in drinking water production to avert BAM contamination. We examined the nature of the interactions between MSH1 and 13 sand filter resident bacteria in dual and triple species assemblies in sand microcosms. The residents affected MSH1-mediated BAM mineralization without always impacting MSH1 cell densities, indicating effects on cell physiology rather than on cell number. Exploitative competition explained most of the effects (70%), but indications of interference competition were also found. Two residents improved BAM mineralization in dual species assemblies, apparently in a mutual cooperation, and overruled negative effects by others in triple species systems. The results suggest that sand filter communities contain species that increase MSH1 fitness. This opens doors for assisting bioaugmentation through co-inoculation with “helper” bacteria originating from and adapted to the target environment.

更新日期：2022-01-18

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