Community Structure of CO 2 -fixing Soil Bacteria from Different Land Use Types in Karst Areas

Carbon dioxide (CO )-fixing bacteria are important microbial communities of the soil carbon cycle. It is important to study their community structure characteristics in karst areas to understand the carbon-sequestration mechanism of the soil ecosystem. The top soil samples of paddy fields, maize fie...

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Bibliographic Details
Published inHuanjing kexue Vol. 40; no. 1; p. 412
Main Authors Zhang, Shuang-Shuang, Jin, Zhen-Jiang, Jia, Yuan-Hang, Li, Qiang
Format Journal Article
LanguageChinese
Published China 08.01.2019
Subjects
karst area
cbbLR gene
CO2-fixing bacteria
high-throughput sequencing
Bradyrhizobium
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Summary:Carbon dioxide (CO )-fixing bacteria are important microbial communities of the soil carbon cycle. It is important to study their community structure characteristics in karst areas to understand the carbon-sequestration mechanism of the soil ecosystem. The top soil samples of paddy fields, maize fields, and citrus orchards were collected in a karst area, mixed zone, and non-karst area at the Maocun karst experimental site in Guilin.The community abundance, composition, and diversity of CO -fixing bacteria were analyzed using high-throughput sequencing technology with as indicating gene. The results show that most of the CO -fixing bacteria can only be classified as the shallow taxonomic group including bacteria and actinomycetes. The -Proteobacteria of Proteobacteria was the dominant class in the three areas. Facultative autotrophic bacteria dominated by rhizobia were the main CO -fixing bacteria. The abundances of Burkholderiales, , , HH103, bv. were higher in the karst area than in the other two areas. Howe
ISSN:0250-3301