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Evidence that elevated CO2 levels can indirectly increase rhizosphere denitrifier activityWe examined the influence of elevated CO2 concentration on denitrifier enzyme activity in wheat rhizoplanes by using controlled environments and solution culture techniques. Potential denitrification activity was from 3 to 24 times higher on roots that were grown under an elevated CO2 concentration of 1,000 micromoles of CO2 mol-1 than on roots grown under ambient levels of CO2. Nitrogen loss, as determined by a nitrogen mass balance, increased with elevated CO2 levels in the shoot environment and with a high NO3- concentration in the rooting zone. These results indicated that aerial CO2 concentration can play a role in rhizosphere denitrifier activity.
Document ID
20040112197
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Smart, D. R.
(University of California Davis 95616, United States)
Ritchie, K.
Stark, J. M.
Bugbee, B.
Date Acquired
August 21, 2013
Publication Date
November 1, 1997
Publication Information
Publication: Applied and environmental microbiology
Volume: 63
Issue: 11
ISSN: 0099-2240
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NCC2-139
CONTRACT_GRANT: 9237101-7976
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Support Systems
Non-NASA Center

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