Evidence for direct organic nitrogen uptake by plants using specific tracer proteins

2001 ◽  
pp. 212-213 ◽  
Author(s):  
N. Koga ◽  
M. Yamagata ◽  
S. Matsumoto ◽  
N. Ae
Keyword(s):  
Nitrogen Uptake ◽  
Organic Nitrogen ◽  
Organic Nitrogen Uptake

scholarly journals Organic nitrogen uptake is a significant contributor to nitrogen economy of subtropical epiphytic bryophytes

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Liang Song ◽  
Hua-Zheng Lu ◽  
Xing-Liang Xu ◽  
Su Li ◽  
Xian-Meng Shi ◽  
...  
Keyword(s):  
Nitrogen Uptake ◽  
Organic Nitrogen ◽  
Nitrogen Economy ◽  
Significant Contributor ◽  
Organic Nitrogen Uptake

Dissolved inorganic and organic nitrogen uptake in the coastal North Sea: A seasonal study

2014 ◽  
Vol 147 ◽  
pp. 78-86 ◽  
Author(s):  
Alessia Moneta ◽  
Bart Veuger ◽  
Pieter van Rijswijk ◽  
Filip Meysman ◽  
Karline Soetaert ◽  
...  
Keyword(s):  
North Sea ◽  
Nitrogen Uptake ◽  
Organic Nitrogen ◽  
Seasonal Study ◽  
Inorganic And Organic Nitrogen ◽  
Inorganic And Organic ◽  
Organic Nitrogen Uptake

Organic nitrogen uptake and growth by the chrysophyte Aureococcus anophagefferens during a brown tide event

1997 ◽  
Vol 129 (2) ◽  
pp. 377-387 ◽  
Author(s):  
G. M. Berg ◽  
P. M. Glibert ◽  
M. W. Lomas ◽  
M. A. Burford
Keyword(s):  
Nitrogen Uptake ◽  
Organic Nitrogen ◽  
Brown Tide ◽  
Aureococcus Anophagefferens ◽  
Organic Nitrogen Uptake

scholarly journals Modeling the effects of organic nitrogen uptake by plants on the carbon cycling of boreal forest and tundra ecosystems

2013 ◽  
Vol 10 (12) ◽  
pp. 7943-7955 ◽  
Author(s):  
Q. Zhu ◽  
Q. Zhuang
Keyword(s):  
Boreal Forest ◽  
Carbon Cycling ◽  
Nitrogen Uptake ◽  
Plant Uptake ◽  
Boreal Forests ◽  
Organic Nitrogen ◽  
Tundra Ecosystem ◽  
Ecosystem Production ◽  
Tundra Ecosystems ◽  
Organic Nitrogen Uptake

Abstract. Boreal forest and tundra are the major ecosystems in the northern high latitudes in which a large amount of carbon is stored. These ecosystems are nitrogen-limited due to slow mineralization rate of the soil organic nitrogen. Recently, abundant field studies have found that organic nitrogen is another important nitrogen supply for boreal forest and tundra ecosystems. In this study, we incorporated a mechanism that allowed boreal plants to uptake small molecular amino acids into a process-based biogeochemical model, the Terrestrial Ecosystem Model (TEM), to evaluate the impact of organic nitrogen uptake on ecosystem carbon cycling. The new version of the model was evaluated for both boreal forest and tundra sites. We found that the modeled organic nitrogen uptake accounted for 36–87% of total nitrogen uptake by plants in tundra ecosystems and 26–50% for boreal forests, suggesting that tundra ecosystem might have more relied on the organic form of nitrogen than boreal forests. The simulated monthly gross ecosystem production (GPP) and net ecosystem production (NEP) tended to be larger with the new version of the model since the plant uptake of organic nitrogen alleviated the soil nitrogen limitation especially during the growing season. The sensitivity study indicated that the most important factors controlling the plant uptake of organic nitrogen was the soil amino acid diffusion coefficient (De) in our model, suggesting that the organic nitrogen uptake by plants is likely to be regulated by the edaphic characteristics of diffusion. The model uncertainty due to uncertain parameters associated with organic nitrogen uptake of the tundra ecosystem was larger than the boreal forest ecosystems. This study suggests that considering the organic nitrogen uptake by plants is important to carbon modeling of boreal forest and tundra ecosystems.

scholarly journals Organic nitrogen uptake of Scots pine seedlings is independent of current carbohydrate supply

2013 ◽  
Vol 33 (6) ◽  
pp. 590-600 ◽  
Author(s):  
L. Gruffman ◽  
S. Palmroth ◽  
T. Nasholm
Keyword(s):  
Scots Pine ◽  
Nitrogen Uptake ◽  
Organic Nitrogen ◽  
Pine Seedlings ◽  
Organic Nitrogen Uptake

scholarly journals Organic nitrogen uptake by arbuscular mycorrhizal fungi in a boreal forest

2012 ◽  
Vol 55 ◽  
pp. 7-13 ◽  
Author(s):  
Matthew D. Whiteside ◽  
Michelle A. Digman ◽  
Enrico Gratton ◽  
Kathleen K. Treseder
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Boreal Forest ◽  
Nitrogen Uptake ◽  
Mycorrhizal Fungi ◽  
Organic Nitrogen ◽  
Arbuscular Mycorrhizal ◽  
Organic Nitrogen Uptake

scholarly journals Modeling the effects of organic nitrogen uptake by plants on the carbon cycling of boreal ecosystems

2013 ◽  
Vol 10 (8) ◽  
pp. 13455-13490 ◽  
Author(s):  
Q. Zhu ◽  
Q. Zhuang
Keyword(s):  
Boreal Forest ◽  
Nitrogen Uptake ◽  
Plant Uptake ◽  
Boreal Forests ◽  
Organic Nitrogen ◽  
Boreal Ecosystems ◽  
Ecosystem Carbon ◽  
Tundra Ecosystem ◽  
Ecosystem Production ◽  
Organic Nitrogen Uptake

Abstract. Boreal forest and tundra are the major ecosystems in the northern high latitudes in which a large amount of carbon is stored. These ecosystems are nitrogen-limited due to slow mineralization rate of the soil organic nitrogen. Recently, abundant field studies have found that organic nitrogen is another important nitrogen supply for boreal ecosystems. In this study, we incorporated a mechanism that allowed boreal plants to uptake small molecular amino acids into a process-based biogeochemical model, the Terrestrial Ecosystem Model (TEM), to evaluate the impact of organic nitrogen uptake on ecosystem carbon cycling. The new version of the model was evaluated at both boreal forest and tundra sites. We found that the modeled organic nitrogen uptake accounted for 36–87% of total nitrogen uptake by plants in tundra ecosystems and 26–50% for boreal forests, suggesting that tundra ecosystem might have more relied on the organic form of nitrogen than boreal forests. The simulated monthly gross ecosystem production (GPP) and net ecosystem production (NEP) tended to be larger with the new version of the model since the plant uptake of organic nitrogen alleviated the soil nitrogen limitation especially during the growing season. The sensitivity study indicated that the most important factors controlling the plant uptake of organic nitrogen were the maximum root uptake rate (Imax) and the radius of the root (r0) in our model. The model uncertainty due to uncertain parameters associated with organic nitrogen uptake at tundra ecosystem was larger than at boreal forest ecosystems. This study suggests that considering the organic nitrogen uptake by plants is important to boreal ecosystem carbon modeling.

Inter-specific variability in organic nitrogen uptake of three temperate grassland species

2003 ◽  
Vol 166 (5) ◽  
pp. 606-611 ◽  
Author(s):  
Alexandra Weigelt ◽  
Rosalind King ◽  
Roland Bol ◽  
Richard D. Bardgett
Keyword(s):  
Nitrogen Uptake ◽  
Organic Nitrogen ◽  
Temperate Grassland ◽  
Grassland Species ◽  
Organic Nitrogen Uptake
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