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Title: Plant nitrogen budget under elevated carbon dioxide level: Regulation by nitrogen absorption and assimilation. Progress report, October 1, 1995--July 31, 1996

Abstract

The overall objective is to assess root physiological and morphological characteristics that may alter plant N acquisition capacity in response to rising atmospheric CO{sub 2} concentration. There is increasing evidence that plant and ecosystem responses to elevated levels of CO{sub 2} will ultimately depend on availability and acquisition rate of other resources such as N. Therefore, knowledge of any changes in root capacity to acquire N is crucial in predicting plant and ecosystem responses to high CO{sub 2}. Here the authors are testing two major hypotheses: (1) elevated CO{sub 2} will enhance root N uptake kinetics and (2) CO{sub 2} enrichment will increase root preference for NO{sub 3}{sup {minus}} as opposed to NH{sub 4}{sup +}. High CO{sub 2} enhances root energy status which should in turn favor energy-intensive processes such as NO{sub 3}{sup {minus}} uptake and assimilation. The above hypotheses are being tested on a range of species from native and agricultural ecosystems using a combination of field, lab and growth chamber studies. The authors have demonstrated a considerable interspecies variation in root N uptake responses to CO{sub 2} enrichment and attempts are now underway to evaluate if such variations are correlated with different functional groups. A comprehensive growth model,more » using physiological and allocation parameters, has been largely completed and will be used to analyze the completed experimental data.« less

Authors:
;
Publication Date:
Research Org.:
New Mexico State Univ., Las Cruces, NM (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
656508
Report Number(s):
DOE/ER/62126-T1-Pt.2
ON: DE98007388; TRN: AHC29817%%63
DOE Contract Number:  
FG03-95ER62126
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1998]
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; PROGRESS REPORT; BIOLOGICAL EFFECTS; CARBON DIOXIDE; ECOLOGICAL CONCENTRATION; NITRATES; PLANT GROWTH; ROOTS; EXPERIMENTAL DATA; MATHEMATICAL MODELS

Citation Formats

BassiriRad, H, and Gutschick, V. Plant nitrogen budget under elevated carbon dioxide level: Regulation by nitrogen absorption and assimilation. Progress report, October 1, 1995--July 31, 1996. United States: N. p., 1998. Web. doi:10.2172/656508.
BassiriRad, H, & Gutschick, V. Plant nitrogen budget under elevated carbon dioxide level: Regulation by nitrogen absorption and assimilation. Progress report, October 1, 1995--July 31, 1996. United States. https://doi.org/10.2172/656508
BassiriRad, H, and Gutschick, V. 1998. "Plant nitrogen budget under elevated carbon dioxide level: Regulation by nitrogen absorption and assimilation. Progress report, October 1, 1995--July 31, 1996". United States. https://doi.org/10.2172/656508. https://www.osti.gov/servlets/purl/656508.
@article{osti_656508,
title = {Plant nitrogen budget under elevated carbon dioxide level: Regulation by nitrogen absorption and assimilation. Progress report, October 1, 1995--July 31, 1996},
author = {BassiriRad, H and Gutschick, V},
abstractNote = {The overall objective is to assess root physiological and morphological characteristics that may alter plant N acquisition capacity in response to rising atmospheric CO{sub 2} concentration. There is increasing evidence that plant and ecosystem responses to elevated levels of CO{sub 2} will ultimately depend on availability and acquisition rate of other resources such as N. Therefore, knowledge of any changes in root capacity to acquire N is crucial in predicting plant and ecosystem responses to high CO{sub 2}. Here the authors are testing two major hypotheses: (1) elevated CO{sub 2} will enhance root N uptake kinetics and (2) CO{sub 2} enrichment will increase root preference for NO{sub 3}{sup {minus}} as opposed to NH{sub 4}{sup +}. High CO{sub 2} enhances root energy status which should in turn favor energy-intensive processes such as NO{sub 3}{sup {minus}} uptake and assimilation. The above hypotheses are being tested on a range of species from native and agricultural ecosystems using a combination of field, lab and growth chamber studies. The authors have demonstrated a considerable interspecies variation in root N uptake responses to CO{sub 2} enrichment and attempts are now underway to evaluate if such variations are correlated with different functional groups. A comprehensive growth model, using physiological and allocation parameters, has been largely completed and will be used to analyze the completed experimental data.},
doi = {10.2172/656508},
url = {https://www.osti.gov/biblio/656508}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 1998},
month = {Tue Sep 01 00:00:00 EDT 1998}
}