Nitrate is an important nitrogen source for Arctic tundra plants

How terrestrial plants use N and respond to soil N loading is central to evaluating and predicting changing ecosystem structure and function with climate warming and N pollution. Here, evidence from NO3− in plant tissues has uncovered the uptake and assimilation of soil NO3− by Arctic tundra plants,...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences
Main Authors: Liu, Xue-Yan, Koba, Keisuke, Koyama, Lina A., Hobbie, Sarah E., Weiss, Marissa S., Inagaki, Yoshiyuki, Shaver, Gaius R., Giblin, Anne E., Hobara, Satoru, Nadelhoffer, Knute J., Sommerkorn, Martin, Rastetter, Edward B., Kling, George W., Laundre, James A., Yano, Yuriko, Makabe, Akiko, Yano, Midori, Liu, Cong-Qiang
Format: Text
Language:English
Published: National Academy of Sciences 2018
Subjects:
Biological Sciences
Arctic
Tundra
Alaska
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5879661/
http://www.ncbi.nlm.nih.gov/pubmed/29540568
https://doi.org/10.1073/pnas.1715382115
Description
Summary:How terrestrial plants use N and respond to soil N loading is central to evaluating and predicting changing ecosystem structure and function with climate warming and N pollution. Here, evidence from NO3− in plant tissues has uncovered the uptake and assimilation of soil NO3− by Arctic tundra plants, which has long been assumed negligible. Soil NO3− contributed about one-third of the bulk N used by tundra plants of northern Alaska. Accordingly, the importance of soil NO3− for tundra plants should be considered in future studies on N and C cycling in Arctic ecosystems where C sequestration is strongly determined by N availability.

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