Effects of plant biomass on denitrifying genes in subsurface-flow constructed wetlands
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
24565872
DOI
10.1016/j.biortech.2014.01.137
PII: S0960-8524(14)00162-X
Knihovny.cz E-resources
- Keywords
- Cattail litter, Denitrifying genes, Nitrate removal, Subsurface flow constructed wetlands (SSF CWs), Typha latifolia,
- MeSH
- Bacteria enzymology genetics MeSH
- Genes, Bacterial * MeSH
- Models, Biological MeSH
- Biomass * MeSH
- Denitrification genetics MeSH
- Wetlands * MeSH
- Nitrate Reductase genetics metabolism MeSH
- RNA, Ribosomal, 16S genetics MeSH
- Plants microbiology MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Nitrate Reductase MeSH
- RNA, Ribosomal, 16S MeSH
The effect of Typha latifolia and its litter on density and abundance of three denitrifying genes (nirS, nirK and nosZ) were investigated in six laboratory-scale SSF CW microcosms. Results showed that the copy numbers of nirS, nirK and nosZ in wetland microcosms were ranged between 10(8)-10(9), 10(6)-10(7) and 10(7)-10(8) copies g(-1), respectively. The presence of T. latifolia encouraged the growth of nirK containing bacteria. Addition of cattail litter could greatly stimulate the growth of bacteria containing nirS and nosZ gene. Path analysis illustrated that the presence of plants and litters had no significant direct impact on denitrifying genes, while it affected the denitrifying genes via alteration of dissolved oxygen and carbon sources.
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