Effects of plant biomass on denitrifying genes in subsurface-flow constructed wetlands
Jazyk angličtina Země Velká Británie, Anglie Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
24565872
DOI
10.1016/j.biortech.2014.01.137
PII: S0960-8524(14)00162-X
Knihovny.cz E-zdroje
- Klíčová slova
- Cattail litter, Denitrifying genes, Nitrate removal, Subsurface flow constructed wetlands (SSF CWs), Typha latifolia,
- MeSH
- Bacteria enzymologie genetika MeSH
- bakteriální geny * MeSH
- biologické modely MeSH
- biomasa * MeSH
- denitrifikace genetika MeSH
- mokřady * MeSH
- nitrátreduktasa genetika metabolismus MeSH
- RNA ribozomální 16S genetika MeSH
- rostliny mikrobiologie MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- nitrátreduktasa MeSH
- RNA ribozomální 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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