Elevated CO₂ and nitrate levels increase wheat root-associated bacterial abundance and impact rhizosphere microbial community composition and function.

ABSTRACT: Elevated CO₂ stimulates plant growth and affects quantity and composition of root exudates, followed by response of its microbiome. Three scenarios representing nitrate fertilization regimes: limited (30 ppm), moderate (70 ppm) and excess nitrate (100 ppm) were compared under ambient and elevated CO₂ (eCO₂, 850 ppm) to elucidate their combined effects on root-surface-associated bacterial community abundance, structure and function. Wheat root-surface-associated microbiome structure and function, as well as soil and plant properties, were highly influenced by interactions between CO₂ and nitrate levels. Relative abundance of total bacteria per plant increased at eCO₂ under excess nitrate. Elevated CO₂ significantly influenced

SUBMITTER: Usyskin-Tonne A 

PROVIDER: S-EPMC8115143 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature