Methanotrophs Contribute to Nitrogen Fixation in Emergent Macrophytes.

ABSTRACT: Root-associated aerobic methanotroph plays an important role in reducing methane emissions from wetlands. In this study, we examined the activity of methane-dependent nitrogen fixation and active nitrogen-fixing bacterial communities on the roots of Typha angustifolia and Scirpus triqueter using a ¹⁵N-N₂ feeding experiment and a cDNA-based clone library sequence of the nifH gene, respectively. A ¹⁵N-N₂ feeding experiment showed that the N₂ fixation rate of S. triqueter (1.74 μmol h^-1 g^-1 dry weight) was significantly higther than that of T. angustifolia (0.48 μmol h^-1 g^-1 dry weight). The presence of CH₄ significantly increased the incorporation o

SUBMITTER: Cui J 

PROVIDER: S-EPMC9036440 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature