Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamada-oka, Suita, Japan.
Microbes Environ. 2010;25(1):22-7. doi: 10.1264/jsme2.me09166.
The atmospheric movement of arid soil can play an important role in the movement of microorganisms attached to soil microparticles. Bacterial community structures in Asian dust collected at Beijing were investigated using the 16S rRNA gene sequence and compared to those in arid soil, a possible source of the dust. Asian dust samples contained 2.5×10(7) to 3.5×10(9) copies of the 16S rRNA gene gram(-1). Therefore, more than 10(13) bacterial cells (km)(-2) per month were estimated to arrive in Beijing via Asian dust. Terminal restriction fragment length polymorphism analysis revealed that the bacterial community structures in Asian dust samples differed greatly according to the scale of the dust event. The bacterial communities from major dust events were similar to those from an arid region of China.
干燥土壤的大气运动可以在附着在土壤微粒上的微生物的运动中发挥重要作用。本研究采用 16S rRNA 基因序列对在北京采集的亚洲沙尘中收集的细菌群落结构进行了调查，并与可能的沙尘源——干旱土壤中的细菌群落结构进行了比较。亚洲沙尘样品中含有 2.5×10(7)至 3.5×10(9)个 16S rRNA 基因拷贝数/克。因此，估计每月有超过 10(13)个细菌细胞/(km)(-2)通过亚洲沙尘到达北京。末端限制性片段长度多态性分析显示，亚洲沙尘样品中的细菌群落结构根据沙尘事件的规模而有很大差异。主要沙尘事件中的细菌群落与中国干旱地区的细菌群落相似。
