Nitrate is an important nitrogen source for Arctic tundra plants.

ABSTRACT: Plant nitrogen (N) use is a key component of the N cycle in terrestrial ecosystems. The supply of N to plants affects community species composition and ecosystem processes such as photosynthesis and carbon (C) accumulation. However, the availabilities and relative importance of different N forms to plants are not well understood. While nitrate (NO₃^-) is a major N form used by plants worldwide, it is discounted as a N source for Arctic tundra plants because of extremely low NO₃^- concentrations in Arctic tundra soils, undetectable soil nitrification, and plant-tissue NO₃^- that is typically below detection limits. Here we reexamine NO₃^- use by tundra plants using a sensitive denitrifier method to analyze p

SUBMITTER: Liu XY 

PROVIDER: S-EPMC5879661 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature