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dc.contributor.author
Chiapella, Jorge Oscar
dc.contributor.author
DeBoer, Verónica
dc.contributor.author
Amico, Guillermo Cesar
dc.contributor.author
Kuhl, Joseph
dc.date.available
2017-02-21T17:28:56Z
dc.date.issued
2011-08
dc.identifier.citation
Chiapella, Jorge Oscar; DeBoer, Verónica; Amico, Guillermo Cesar; Kuhl, Joseph; A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America; Botanical Society Of America; American Journal Of Botany; 98; 8; 8-2011; 1366-1380
dc.identifier.issn
0002-9122
dc.identifier.uri
http://hdl.handle.net/11336/13257
dc.description.abstract
Premise of the study: In the North American Arctic, the existence of one or several taxa closely related to Deschampsia cespitosa var. cespitosa has remained a puzzle for many years. Extreme morphological variation, lack of clear limits between alleged forms, and an extended geographic range often render identification keys incomplete, and raise the question of how many species this taxon represents. Methods: Morphological and molecular analysis, including multivariate statistics, ITS and the cpDNA marker trnK-rps16, was conducted on D. cespitosa var. cespitosa and related taxa using 201 herbarium specimens from northern North America (Alaska, Canada, and Greenland). Fifty-three morphological centeracters were recorded from all specimens, while sequences were retrieved from 167 specimens. Key results: Results show that Deschampsia cespitosa (L.) P. Beauv. var. cespitosa, D. cespitosa subsp. alpina (L.) Tzvelev, D. cespitosa subsp. beringensis (Hultén) W. E. Lawr., D. brevifolia R. Br., D. cespitosa (L.) P. Beauv. subsp. glauca (Hartm.) C. Hartm., D. mackenzieana Raup, D. cespitosa subsp. orientalis Hultén, and D. pumila (Griseb.) Ostenf. differed significantly in a few morphological variables, but molecularly are a closely related group with several sequences and haplotypes that are nearly identical. Conclusions: Overall, the evidence points to the existence of a single species, Deschampsia cespitosa. The occurrence of slightly different morphological types related to specific geographical distributions allows recognition of three additional taxa at the infraspecific level, D. cespitosa subsp. alpina, D. cespitosa subsp. beringensis, and D. brevifolia. All studied taxa showed morphological variation in a gradient, suggesting the existence of phenotypic plasticity.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Botanical Society Of America
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Arctic Artic
dc.subject
Deschampsia
dc.subject
Morphology
dc.subject
Dna
dc.subject.classification
Ciencias de las Plantas, Botánica
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-02-15T14:09:11Z
dc.identifier.eissn
1537-2197
dc.journal.volume
98
dc.journal.number
8
dc.journal.pagination
1366-1380
dc.journal.pais
Estados Unidos
dc.journal.ciudad
St. Louis
dc.description.fil
Fil: Chiapella, Jorge Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina. Universidad Nacional de Córdoba; Argentina
dc.description.fil
Fil: DeBoer, Verónica. U. S. Department of Agriculture, Agricultural Research Service, Subarctic Agricultural Research Unit; Estados Unidos. Scientific Crime Detection Laboratory; Estados Unidos
dc.description.fil
Fil: Amico, Guillermo Cesar. Universidad Nacional del Comahue. Centro Regional Universitario; Argentina
dc.description.fil
Fil: Kuhl, Joseph. U. S. Department of Agriculture, Agricultural Research Service, Subarctic Agricultural Research Unit; Estados Unidos
dc.journal.title
American Journal Of Botany
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.amjbot.org/content/98/8/1366.long
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.3732/ajb.1000495
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