Elevated atmospheric CO₂ concentration triggers redistribution of nitrogen to promote tillering in rice.

ABSTRACT: Elevated atmospheric CO₂ concentration (eCO₂) often reduces nitrogen (N) content in rice plants and stimulates tillering. However, there is a general consensus that reduced N would constrain rice tillering. To resolve this contradiction, we investigated N distribution and transcriptomic changes in different rice plant organs after subjecting them to eCO₂ and different N application rates. Our results showed that eCO₂ significantly promoted rice tillers (by 0.6, 1.1, 1.7, and 2.1 tillers/plant at 0, 75, 150, and 225 kg N ha^-1 N application rates, respectively) and more tillers were produced under higher N application rates, confirming that N availability constrained tillering in the early stages of growth. Although N content declined in

SUBMITTER: Zhou J 

PROVIDER: S-EPMC10168068 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature