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dc.contributor.author
Golluscio, Rodolfo  
dc.contributor.author
Irueta, Regina  
dc.contributor.author
Cipriotti, Pablo Ariel  
dc.date.available
2016-02-12T18:56:22Z  
dc.date.issued
2014-06  
dc.identifier.citation
Golluscio, Rodolfo; Irueta, Regina; Cipriotti, Pablo Ariel; The elusive quantifi cation of nitrogen fi xation in xeric shrubs: The case of Adesmia volckmanni, a Patagonian leguminous shrub; Elsevier; Journal of Arid Environments; 111; 6-2014; 22-26  
dc.identifier.issn
0140-1963  
dc.identifier.uri
http://hdl.handle.net/11336/4174  
dc.description.abstract
The comparison of 15N natural abundance (δ15N) between fixing and non-fixing reference species, is the most feasible method for nitrogen fixation studies in xeric shrubs. However, it assumes that both species use the same sources of soil N, the δ15N of such source is clearly different from zero, and the difference between the δ15N of both species is ≥ 5‰. On the other hand, the analysis of the difference between the δ15N of nodules and leaves (Δδ15Nn−l) does not require a reference species. To evaluate the effect of water availability on nitrogen fixation, we analyzed the variation of δ15N and Δδ15Nn−l in watered and unwatered plants of Adesmia volckmanni Phil. (Fabaceae) and Mulinum spinosum (Cav.) Pers. (Apiaceae), formerly proposed as non-fixing reference species. However, we found that M. spinosum was not valid as reference species to study N fixation in Adesmia volckmann because its δ15N was closer to zero than that of the presumably fixing species, suggesting they use different soil N sources. In addition, water availability did not affect biological fixation after watering because both leaf δ15N and Δδ15Nn−l of A. volckmanni did not change either as soil dried up along the growing season nor in response to watering. However, the presence of nodules itself, the δ15N closer to zero than in a former dry year, and the Δδ15Nn−l (+ 1.23‰) suggest that biological fixation could have occurred before watering, probably during early spring.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/  
dc.subject
Elusive Measurement  
dc.subject
Nitrogen Fixation  
dc.subject
Xeric Shrubs  
dc.subject
Adesmia Volckmanni  
dc.subject.classification
Agricultura  
dc.subject.classification
Agricultura, Silvicultura y Pesca  
dc.subject.classification
CIENCIAS AGRÍCOLAS  
dc.title
The elusive quantifi cation of nitrogen fi xation in xeric shrubs: The case of Adesmia volckmanni, a Patagonian leguminous shrub  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2016-03-30 10:35:44.97925-03  
dc.journal.volume
111  
dc.journal.pagination
22-26  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Golluscio, Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Producción Animal; Argentina  
dc.description.fil
Fil: Irueta, Regina. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Producción Animal; Argentina  
dc.description.fil
Fil: Cipriotti, Pablo Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; Argentina  
dc.journal.title
Journal of Arid Environments  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0140196314001633  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jaridenv.2014.07.006  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/issn/0140-1963