The population dynamics of bacterial community was investigated in three Agricultural soils, designated as Loamy sand (A), Peaty coarse (B) and Loamy coarse sand (C) in North-East, Nigeria. The soil chemical propertie...The population dynamics of bacterial community was investigated in three Agricultural soils, designated as Loamy sand (A), Peaty coarse (B) and Loamy coarse sand (C) in North-East, Nigeria. The soil chemical properties were characterized to fully understand their nature. Metagenomic approach was used to extract soil DNA using the fast DNA Spin Kit extraction technique. The PCR-electrophoresed DNA bands were excised and subjected to a full scale Denaturing Gradient Gel Electrophoresis (DGGE) analysis. DGGE fingerprinting for the PCR-16S rDNA product revealed a diverse profile of complex population of bacterial community in the study area. The study shows that more bacterial community can be fully investigated using molecular techniques rather than traditional culture method. The implication of the results obtained is discussed.展开更多
应用PCR—DGGE技术对某微生物肥料的质量进行了跟踪监测,并结合分离培养和克隆文库分析对其菌种组成进行了检测。结果表明,同一生产批次3个不同包装样品的细菌和真菌DGGE(denaturing gradient gel eleetrophoresis)图谱相似性为80%...应用PCR—DGGE技术对某微生物肥料的质量进行了跟踪监测,并结合分离培养和克隆文库分析对其菌种组成进行了检测。结果表明,同一生产批次3个不同包装样品的细菌和真菌DGGE(denaturing gradient gel eleetrophoresis)图谱相似性为80%-100%,3个不同生产批次之间DGGE图谱相似性为80%-88%,表明该微生物肥料的菌种组成的稳定性较好。但分离培养和克隆文库分析结果显示样品的菌种组成与产品标签说明之间存在较大差异。对于产品标注的6种微生物组成,只有Lactobacillus属的微生物可与之对应,其他检测到的Bacillus、Monascus、Brevibacillus、Psudomonas和Penicillium属的微生物并未包括在产品说明中。研究表明用分子生态学方法可以比较客观准确的对微生物肥料质量进行评估和峪测。展开更多
为了解麦洼牦牛肠道细菌群落结构组成和功能及其动态变化过程,同时获得具有潜在益生菌活性和应用可能性的肠道菌株,采用不同的培养基在不同的培养条件下分离麦洼牦牛肠道细菌并进行16S r DNA分子鉴定,同时采用变性梯度凝胶电泳(denaturi...为了解麦洼牦牛肠道细菌群落结构组成和功能及其动态变化过程,同时获得具有潜在益生菌活性和应用可能性的肠道菌株,采用不同的培养基在不同的培养条件下分离麦洼牦牛肠道细菌并进行16S r DNA分子鉴定,同时采用变性梯度凝胶电泳(denaturing gradient gel electrophoresis,DGGE)技术分析不同年龄麦洼牦牛肠道细菌的群落结构和功能及其差异。结果表明,从不同年龄麦洼牦牛大肠内容物中共分离到90株细菌,其中3株归为放线菌门(Actinobacteria),64株为厚壁菌门(Firmicutes),23株为变形菌门(Proteobacteria);分离到的34株芽孢杆菌属(Bacillus)和14株乳酸杆菌属(Lactobacillus)细菌具有潜在益生菌活性,可作为微生物饲料添加剂补饲麦洼牦牛;对DGGE图谱的UPGMA聚类、PCA和多样性指数分析显示,不同年龄的麦洼牦牛肠道细菌的群落结构有差异,相同年龄的个体相似度较高,而不同年龄的个体相似度较小,较大年龄(2.5和3.5岁)的牦牛肠道菌群多样性大于较小年龄个体(0.5和1.5岁),且分布更均匀,肠道菌群随宿主年龄变化是一个动态变化并趋于稳定的过程;DGGE条带的物种鉴定结果表明,大部分条带为未(能)培养细菌,PCR-DGGE与分离培养法结合可以很好地表征麦洼牦牛肠道菌群的结构和功能。展开更多
文摘The population dynamics of bacterial community was investigated in three Agricultural soils, designated as Loamy sand (A), Peaty coarse (B) and Loamy coarse sand (C) in North-East, Nigeria. The soil chemical properties were characterized to fully understand their nature. Metagenomic approach was used to extract soil DNA using the fast DNA Spin Kit extraction technique. The PCR-electrophoresed DNA bands were excised and subjected to a full scale Denaturing Gradient Gel Electrophoresis (DGGE) analysis. DGGE fingerprinting for the PCR-16S rDNA product revealed a diverse profile of complex population of bacterial community in the study area. The study shows that more bacterial community can be fully investigated using molecular techniques rather than traditional culture method. The implication of the results obtained is discussed.
文摘应用PCR—DGGE技术对某微生物肥料的质量进行了跟踪监测,并结合分离培养和克隆文库分析对其菌种组成进行了检测。结果表明,同一生产批次3个不同包装样品的细菌和真菌DGGE(denaturing gradient gel eleetrophoresis)图谱相似性为80%-100%,3个不同生产批次之间DGGE图谱相似性为80%-88%,表明该微生物肥料的菌种组成的稳定性较好。但分离培养和克隆文库分析结果显示样品的菌种组成与产品标签说明之间存在较大差异。对于产品标注的6种微生物组成,只有Lactobacillus属的微生物可与之对应,其他检测到的Bacillus、Monascus、Brevibacillus、Psudomonas和Penicillium属的微生物并未包括在产品说明中。研究表明用分子生态学方法可以比较客观准确的对微生物肥料质量进行评估和峪测。
文摘为了解麦洼牦牛肠道细菌群落结构组成和功能及其动态变化过程,同时获得具有潜在益生菌活性和应用可能性的肠道菌株,采用不同的培养基在不同的培养条件下分离麦洼牦牛肠道细菌并进行16S r DNA分子鉴定,同时采用变性梯度凝胶电泳(denaturing gradient gel electrophoresis,DGGE)技术分析不同年龄麦洼牦牛肠道细菌的群落结构和功能及其差异。结果表明,从不同年龄麦洼牦牛大肠内容物中共分离到90株细菌,其中3株归为放线菌门(Actinobacteria),64株为厚壁菌门(Firmicutes),23株为变形菌门(Proteobacteria);分离到的34株芽孢杆菌属(Bacillus)和14株乳酸杆菌属(Lactobacillus)细菌具有潜在益生菌活性,可作为微生物饲料添加剂补饲麦洼牦牛;对DGGE图谱的UPGMA聚类、PCA和多样性指数分析显示,不同年龄的麦洼牦牛肠道细菌的群落结构有差异,相同年龄的个体相似度较高,而不同年龄的个体相似度较小,较大年龄(2.5和3.5岁)的牦牛肠道菌群多样性大于较小年龄个体(0.5和1.5岁),且分布更均匀,肠道菌群随宿主年龄变化是一个动态变化并趋于稳定的过程;DGGE条带的物种鉴定结果表明,大部分条带为未(能)培养细菌,PCR-DGGE与分离培养法结合可以很好地表征麦洼牦牛肠道菌群的结构和功能。