Changes in soil microbial community structure with planting years and cultivars of tree peony (Paeonia suffruticosa)
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- 作者：Dong Xue (1)
Xiangdong Huang (1) - 关键词：Microbial community ; Paeonia suffruticosa ; Paeoniaceae ; Plant age ; Tree peony cultivars
- 刊名：World Journal of Microbiology and Biotechnology
- 出版年：2014
- 出版时间：February 2014
- 年：2014
- 卷：30
- 期：2
- 页码：389-397
- 全文大小：371 KB
- 作者单位：Dong Xue (1)
Xiangdong Huang (1)
1. Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang, 471023, China - ISSN：1573-0972
文摘
To understand the effects of planting tree peony (Paeonia suffruticosa) on soil microbial community structure, soil samples were collected from the tree peony gardens with three peony cultivars and three planting years, and adjacent wasteland at Luoyang, Henan Province of China. Soil microbial communities were analyzed by the polymerase chain reaction-denaturing gradient gel electrophoresis (PCR–DGGE) of partial 16S rDNA and sequencing methods. With the succeeding development of tree peony garden ecosystems, soil pH, organic C, total P, and available P increased. Soil total N, the cell numbers of bacteria, fungi, and actinomycetes, the Shannon’s diversity index (H), richness (S), and Evenness (E H ) first showed an increasing trend after wasteland was reclaimed and then a decreasing trend became apparent after 5?years of planting. Principal component analysis based on DGGE banding patterns showed that the microbial community structures were influenced by tree peony cultivars and planting years, and the influences of planting years were greater than those of tree peony cultivars. Sequence analysis of the DGGE bands revealed that the dominant bacteria in tree peony garden soils belonged to Proteobacteria, Bacteroidetes, Actinobacteria, Firmicutes, Acidobacteria, Planctomycetes, Euryarchaeota, and Unclassified-bacteria. Moreover, some bacteria closely related to Bradyrhizobium, Sphingopyxis, Novosphingobium, and Sphingomonas, which have been associated with nitrogen fixation and recalcitrant compounds degradation, disappeared with the increasing planting years of tree peony. The bacteria had similarity of 100?% compared with Pseudomonas mandelii which was a denitrifying bacteria, and increased gradually with increasing planting years of tree peony.