A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America
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 r...
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ftconicet:oai:ri.conicet.gov.ar:11336/13257 2023-10-09T21:48:57+02:00 A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America Chiapella, Jorge Oscar DeBoer, Verónica Amico, Guillermo Cesar Kuhl, Joseph application/pdf http://hdl.handle.net/11336/13257 eng eng Botanical Society Of America info:eu-repo/semantics/altIdentifier/url/http://www.amjbot.org/content/98/8/1366.long info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.3732/ajb.1000495 http://hdl.handle.net/11336/13257 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 0002-9122 1537-2197 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Arctic Artic Deschampsia Morphology Dna https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.3732/ajb.1000495 2023-09-24T20:19:56Z 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. 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 Fil: DeBoer, ... Article in Journal/Newspaper Arctic Greenland Alaska CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Arctic Canada Greenland Argentina American Journal of Botany 98 8 1366 1380 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Arctic Artic Deschampsia Morphology Dna https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Arctic Artic Deschampsia Morphology Dna https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 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 |
topic_facet |
Arctic Artic Deschampsia Morphology Dna https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
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. 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 Fil: DeBoer, ... |
format |
Article in Journal/Newspaper |
author |
Chiapella, Jorge Oscar DeBoer, Verónica Amico, Guillermo Cesar Kuhl, Joseph |
author_facet |
Chiapella, Jorge Oscar DeBoer, Verónica Amico, Guillermo Cesar Kuhl, Joseph |
author_sort |
Chiapella, Jorge Oscar |
title |
A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America |
title_short |
A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America |
title_full |
A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America |
title_fullStr |
A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America |
title_full_unstemmed |
A morphological and molecular study in the Deschampsia cespitosa complex (Poaceae; Poeae; Airinae) in northern North America |
title_sort |
morphological and molecular study in the deschampsia cespitosa complex (poaceae; poeae; airinae) in northern north america |
publisher |
Botanical Society Of America |
url |
http://hdl.handle.net/11336/13257 |
geographic |
Arctic Canada Greenland Argentina |
geographic_facet |
Arctic Canada Greenland Argentina |
genre |
Arctic Greenland Alaska |
genre_facet |
Arctic Greenland Alaska |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www.amjbot.org/content/98/8/1366.long info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.3732/ajb.1000495 http://hdl.handle.net/11336/13257 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 0002-9122 1537-2197 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.3732/ajb.1000495 |
container_title |
American Journal of Botany |
container_volume |
98 |
container_issue |
8 |
container_start_page |
1366 |
op_container_end_page |
1380 |
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1779312002875785216 |