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首页> 美国卫生研究院文献>The Scientific World Journal >Fungal and Bacterial Communities in the Rhizosphere of Pinus tabulaeformis Related to the Restoration of Plantations and Natural Secondary Forests in the Loess Plateau Northwest China
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Fungal and Bacterial Communities in the Rhizosphere of Pinus tabulaeformis Related to the Restoration of Plantations and Natural Secondary Forests in the Loess Plateau Northwest China

机译：黄土高原油松人工林根际的真菌和细菌群落与人工林和天然次生林的恢复有关

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摘要

Chinese pine (Pinus tabulaeformis Carr.) is widely planted for restoration in destroyed ecosystems of the Loess Plateau in China. Although soil microbial communities are important subsurface components of the terrestrial ecosystems, little is known about fungal and bacterial communities in the rhizosphere of planted and natural P. tabulaeformis forests in the region. In this study, fungal and bacterial communities in the rhizosphere of P. tabulaeformis were analyzed by nested PCR-DGGE (denaturing gradient gel electrophoresis). Diversity analysis revealed that the values of the Shannon-Wiener index (H) and the Simpson index (D) of fungal communities were higher in natural secondary forests than in plantations except for the 3-year-old site. Moreover, the values of species richness, H, and D of the bacterial communities were also higher in the former. Totally, 18 fungal and 19 bacterial DGGE band types were successfully retrieved and sequenced. The dominant fungi in the rhizosphere of P. tabulaeformis belonged to the phylum of Basidiomycota, while the dominant bacteria belonged to the phylum of Proteobacteria. Principal component analysis indicated that fungal and bacterial species were more unitary in plantations than in natural secondary forests, and the majority of them were more likely to appear in the latter. Correlation analysis showed no significant correlation between the fungal and bacterial community diversities.
机译：油松（Pinus tabulaeformis Carr。）在中国黄土高原被破坏的生态系统中被广泛种植。尽管土壤微生物群落是陆地生态系统的重要地下组成部分，但对该地区人工和天然油松林的根际真菌和细菌群落知之甚少。在这项研究中，通过嵌套式PCR-DGGE（变性梯度凝胶电泳）分析了油松根际的真菌和细菌群落。多样性分析表明，除了3年生林地以外，天然次生林中真菌群落的香农-维纳指数（H）和辛普森指数（D）的值均高于人工林。此外，前者中细菌群落的物种丰富度，H和D值也较高。总共成功检索了18种真菌和19种细菌DGGE带类型并进行了测序。油松根际的优势真菌属于担子菌门，而优势细菌则属于变形杆菌门。主成分分析表明，与天然次生林相比，人工林中的真菌和细菌种类更单一，而大多数次生林中更容易出现。相关分析表明真菌和细菌群落多样性之间无显着相关性。

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