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| Dublin Core |
PKP Metadata Items |
Metadata for this Document |
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| 1. |
Title |
Title of document |
ASSESSMENT OF N2 FIXATION BY THREE Arachis pintoi ECOTYPES USING THE ISOTOPE DILUTION TECHNIQUE |
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| 2. |
Creator |
Author's name, affiliation, country |
Braulio Valles de la Mora; Mexico |
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| 2. |
Creator |
Author's name, affiliation, country |
Georg Cadisch; Germany |
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| 3. |
Subject |
Discipline(s) |
Biology |
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| 3. |
Subject |
Keyword(s) |
Arachis pintoi ecotypes; reference plants; Bradyrhizobium strain; 15N isotope. |
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| 4. |
Description |
Abstract |
The nitrogen derived from N2 fixation was measured by the 15N isotope dilution method, in three Arachis pintoi (Ap) ecotypes: CIAT 17434, 18744 and 18748, using a Bradyrhizobium strain (BS) CIAT 3101, and native strains (NS) from Veracruz, Mexico, on greenhouse conditions. The reference plants were: a non-nodulating Arachis hypogaea, Brachiaria arrecta, Brachiaria brizantha and Cynodon nlemfuensis. Plant material received a 15N-enriched solution at 5 atom % 15N. Five harvests were done, where dry matter yield was highest (Pï‚£0.001) in Ap ecotypes+BS (53.9 ±5.2 g pot-1), vs Ap ecotypes+NS (19.7 ± 0.7 g pot-1). N yield (mg pot-1) of Ap ecotypes+NS was: 439 ± 19.6 mg pot-1 vs 1538 ± 117.0 mg pot-1 (Pï‚£0.001) from Ap ecotypes+BS. Values of atom% 15N in excess of legume shoots were lower (0.027 ± 0.01) with BS, compared to NS group (0.052 ± 0.002). The proportion of N2 fixed was greater than 0.5 in the three Ap ecotypes+ BS, using grasses as reference plant. Arachis pintoi ecotypes CIAT 17434 and CIAT 18744 fixed more N than ecotype CIAT 18748; and the improved Bradyrhizobium strain CIAT 3101 was more efficient to fix N2 than the native strains. |
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| 5. |
Publisher |
Organizing agency, location |
Universidad Autónoma de Yucatá¡n |
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| 6. |
Contributor |
Sponsor(s) |
CONACYT (MEXICO); UNAM (MEXICO) |
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| 7. |
Date |
(YYYY-MM-DD) |
2010-03-09
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| 8. |
Type |
Status & genre |
Peer-reviewed Article |
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| 8. |
Type |
Type |
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| 9. |
Format |
File format |
PDF, PDF (Español (España)) |
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| 10. |
Identifier |
Uniform Resource Identifier |
http://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/560 |
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| 10. |
Identifier |
Uniform Resource Name (URN) |
http://www.revista.ccba.uady.mx/urn:ISSN:1870-0462-tsaes.v12i3.560 |
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| 11. |
Source |
Title; vol., no. (year) |
Tropical and Subtropical Agroecosystems; Vol 12, No 3 (2010): (September - December) |
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| 12. |
Language |
English=en |
en |
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| 14. |
Coverage |
Geo-spatial location, chronological period, research sample (gender, age, etc.) |
Latin America |
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| 15. |
Rights |
Copyright and permissions |
Copyright (c)
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