Elevated Atmospheric CO₂ and Nitrogen Fertilization Affect the Abundance and Community Structure of Rice Root-Associated Nitrogen-Fixing Bacteria.

ABSTRACT: Elevated atmospheric CO₂ (eCO₂) results in plant growth and N limitation, yet how root-associated nitrogen-fixing bacterial communities respond to increasing atmospheric CO₂ and nitrogen fertilization (eN) during the growth stages of rice is unclear. Using the nifH gene as a molecular marker, we studied the combined effect of eCO₂ and eN on the diazotrophic community and abundance at two growth stages in rice (tillering, TI and heading, HI). Quantitative polymerase chain reaction (qPCR) showed that eN had no obvious effect on nifH abundance in rice roots under either ambient CO₂ (aCO₂) or eCO₂ treatment at the TI stage; in contrast, at the HI, nifH copy numbers were increased under eCO_2</

SUBMITTER: Liu J 

PROVIDER: S-EPMC8103900 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature