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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/86/5/AJ0860050782
Last checked: 12/14/2016
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| Publication Type:
| Refereed |
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| Author(s): | Cheng, Weixin;
Coleman, David C.;
Carroll, C. Ronald;
Hoffman, Carol A. |
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| Author Affiliation: | Institute of Ecology, Univ. of Georgia, Athens, GA 30602 |
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| Title: | Investigating short-term carbon flows in rhizospheres of different plant species, using isotopic trapping |
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| Source: | Agronomy Journal. Vol. 86, No. 5, September/October 1994, p. 782-788. |
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| Publishing Information: | Washington: American Society of Agronomy |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Carbon isotope ratio; Respiration; Triticum aestivum; Festuca arundinacea; Ecosystems; Carbon-14
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| Abstract/Contents: | "Many difficulties exist in studying rhizosphere carbon flows in situ because of limited methodologies. Current photosynthate allocation to root respiration, rhizosphere microbial respiration and soluble root exudates in the rhizosphere microbial respiration and soluble root exudates in the rhizosphere of winter wheat (Triticum aestivumL.), tall fescue (Festuca arundinaceaSchreb.), and buffalo gourd (Cucurbita foetidissimaHBK) were investigated using an isotopic trapping procedure. Plants were grown in containers with 165g of sandy clay loam soil for 3 wk before the the time of (14)C pulse labeling. Most root exudates were utilized by the microbes in the immediate rhizosphere and released as (14)CO[2]. Only a small amount of exudates was found in the bulk soil (2.7, 2.5, and 3.7% in the control treatments of wheat, tall fescue, and buffalo gourd respectively). The isotopic trapping mechanism was valid for all three species even though the patterns of total rhizosphere respiration (measured as total (14)C[2]) rates during the initial 8 h of tracing for the three plant species were different in peak time and peak height. The isotopic trapping procedure can be used in rhizosphere studies for various plant species in principle. Some modifications to the procedure may be needed for different plant-soil systems." |
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| Language: | English |
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| References: | 25 |
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| Note: | Equations
Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cheng, W., D. C. Coleman, C. R. Carroll, and C. A. Hoffman. 1994. Investigating short-term carbon flows in rhizospheres of different plant species, using isotopic trapping. Agron. J. 86(5):p. 782-788. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/86/5/AJ0860050782
Last checked: 12/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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