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首页> 外文期刊>African Journal of Biotechnology >Diversity of isolates performing Fe(III) reduction from paddy soil fed by different organic carbon sources
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Diversity of isolates performing Fe(III) reduction from paddy soil fed by different organic carbon sources

机译：不同有机碳源给稻田土壤还原Fe（III）的分离菌多样性

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This study examined microbial?diversity of Fe(III)-reducing bacteria isolates in paddy soils amended with ferrihydrite and different organic carbon (C) sources. Results show?that?Fe(III) reduction rate and Fe(II) accumulation in soil enrichments amended with glucose were the greatest followed by pyruvate, lactate, acetate and control. ARDRA (amplified ribosomal deoxyribonucleic acid restriction analysis) analysis showed 161 Fe(III)-reducing bacteria strains isolated from associated soil enrichment cultures fell into seven groups.?Dominant populations in soil enrichments shifted according to amended organic C substrate.?Paenibacillus?spp. and?Clostridum?spp. occurred in all soil enrichment cultures.?Solibacillus?spp. and?Lysinibacillus?spp. were enriched by acetate, while?Bacillus?spp. was dominant in pyruvate-amended soil enrichments.?Azotobacter?spp. was detected in all soil enrichments except those amended with glucose, which were mainly consisted of?Pseudomonas?spp. Data analysis indicated the highest Fe(III)-reducing bacterial diversity occurring in acetate and lactate-amended soil enrichments, and glucose-amended enrichments characterized with most predominant species. In summary, this study?demonstratesa high diversity of microbial Fe(III)-reducing?bacterial populations and their response to different organic C sources in paddy soils. Their versatile C metabolism plays an important role in Fe-C cycling.
机译：这项研究检查了在铁土矿和不同有机碳（C）源改良的水稻土中，分离铁（III）的细菌分离株的微生物多样性。结果表明，用葡萄糖改良的土壤富集物中的Fe（III）还原速率和Fe（II）积累最大，其次是丙酮酸，乳酸，乙酸盐和对照。 ARDRA（核糖体脱氧核糖核酸限制性酶切扩增分析）分析表明，从相关土壤富集培养物中分离出的161个还原Fe（III）细菌菌株分为7组。土壤富集的主要种群根据修正的有机C底物而变化。和？Clostridum？spp。发生在所有土壤富集培养中。和？Lysinibacillus？spp。富含乙酸，而芽孢杆菌属。在丙酮酸改良的土壤富集中占主导地位。在所有土壤富集中都检测到了除葡萄糖补充剂之外的葡萄糖，葡萄糖主要由？假单胞菌？spp组成。数据分析表明，醋酸盐和乳酸改良的土壤富集以及葡萄糖修饰的富集具有最高的主要物种特征，减少Fe（III）的细菌多样性最高。总而言之，本研究证明了水稻土中微生物减少Fe（III）的细菌种群的多样性及其对不同有机碳源的响应。它们的多功能碳代谢在Fe-C循环中起重要作用。

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