Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia

Autores
Masini, Ana Carla Ailín; Rovere, Adriana; Pirk, Gabriela Inés
Año de publicación
2014
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Cacti are characteristic plants in arid ecosystems, where they play an important ecological role. Many species are threatened because of habitat destruction and collection for commercial purposes. In South America, Argentina is one of the countries with the greatest cacti richness and endemisms. However, cacti have been scarcely studied, especially the southernmost species. Since the study of cacti’s reproductive biology would help to improve their conservation status, we studied basic physiological aspects of the germination of two endemic species of Argentina and Chile, Maihuenia patagonica (Phil.) Britton & Rose and Maihueniopsis darwinii (Hensl.) F. Ritter var. hickenii (Britton & Rose) R. Kiesling. Germination percentage (G), mean germination time (TMG) and time until germination (IG) of control seeds and seeds subjected to three pre-germinative treatments were evaluated. Treatments were cold moist stratification for 40 days, mechanical scarification with sand and sandpaper, and mechanical scarification with a scalpel. Laboratory assays were performed at 20/10 °C and 12 h light/12 h dark regime during 60 days. In M. patagonica germination in the stratification treatment did not differ from the control, but was higher in the scarification with scalpel. In M. darwinii var. hickenii germination only differed between the stratification and the scarification with scalpel. TMG and IG were higher in the stratification treatment than in the control for M. patagonica, whereas scarification treatments did not differ from the control. As for M. darwinii var. hickenii no differences were detected for TMG, but the IG was lower in the stratification than in the control. Probably both species presents some kind of dormancy, since germination percentages were low (M. patagonica between 8-27 % and M. darwinii var. hickenii between 17-26 %) but seeds presented high viability. Presence of physical dormancy is discarded because control seeds of both species germinated and the presence of non deep physiological dormancy is proposed. The latter was partially overcome by mechanical scarification in M. patagonica. These results are a new contribution to the study of cacti in South America and could help to develop in situ conservation strategies through the restoration of degraded areas.
Fil: Masini, Ana Carla Ailín. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Rovere, Adriana. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Pirk, Gabriela Inés. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Materia
ARID ZONES
DORMANCY
MAIHUENIOIDEAE
OPUNTIOIDEAE
PAYUNIA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc/2.5/ar/
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CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
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network_name_str CONICET Digital (CONICET)
spelling Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagoniaPre-germinative requirements of maihuenia patagonica and maihueniopsis darwinii, endemic cacti from PatagoniaMasini, Ana Carla AilínRovere, AdrianaPirk, Gabriela InésARID ZONESDORMANCYMAIHUENIOIDEAEOPUNTIOIDEAEPAYUNIAhttps://purl.org/becyt/ford/4.5https://purl.org/becyt/ford/4Cacti are characteristic plants in arid ecosystems, where they play an important ecological role. Many species are threatened because of habitat destruction and collection for commercial purposes. In South America, Argentina is one of the countries with the greatest cacti richness and endemisms. However, cacti have been scarcely studied, especially the southernmost species. Since the study of cacti’s reproductive biology would help to improve their conservation status, we studied basic physiological aspects of the germination of two endemic species of Argentina and Chile, Maihuenia patagonica (Phil.) Britton & Rose and Maihueniopsis darwinii (Hensl.) F. Ritter var. hickenii (Britton & Rose) R. Kiesling. Germination percentage (G), mean germination time (TMG) and time until germination (IG) of control seeds and seeds subjected to three pre-germinative treatments were evaluated. Treatments were cold moist stratification for 40 days, mechanical scarification with sand and sandpaper, and mechanical scarification with a scalpel. Laboratory assays were performed at 20/10 °C and 12 h light/12 h dark regime during 60 days. In M. patagonica germination in the stratification treatment did not differ from the control, but was higher in the scarification with scalpel. In M. darwinii var. hickenii germination only differed between the stratification and the scarification with scalpel. TMG and IG were higher in the stratification treatment than in the control for M. patagonica, whereas scarification treatments did not differ from the control. As for M. darwinii var. hickenii no differences were detected for TMG, but the IG was lower in the stratification than in the control. Probably both species presents some kind of dormancy, since germination percentages were low (M. patagonica between 8-27 % and M. darwinii var. hickenii between 17-26 %) but seeds presented high viability. Presence of physical dormancy is discarded because control seeds of both species germinated and the presence of non deep physiological dormancy is proposed. The latter was partially overcome by mechanical scarification in M. patagonica. These results are a new contribution to the study of cacti in South America and could help to develop in situ conservation strategies through the restoration of degraded areas.Fil: Masini, Ana Carla Ailín. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Rovere, Adriana. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Pirk, Gabriela Inés. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaEdiciones Univ2014-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/127077Masini, Ana Carla Ailín; Rovere, Adriana; Pirk, Gabriela Inés; Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia; Ediciones Univ; Gayana. Botánica; 71; 2; 12-2014; 188-1980016-53010717-6643CONICET DigitalCONICETspainfo:eu-repo/semantics/altIdentifier/url/https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-66432014000200002info:eu-repo/semantics/altIdentifier/doi/10.4067/S0717-66432014000200002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:53:03Zoai:ri.conicet.gov.ar:11336/127077instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:53:04.254CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
Pre-germinative requirements of maihuenia patagonica and maihueniopsis darwinii, endemic cacti from Patagonia
title Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
spellingShingle Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
Masini, Ana Carla Ailín
ARID ZONES
DORMANCY
MAIHUENIOIDEAE
OPUNTIOIDEAE
PAYUNIA
title_short Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
title_full Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
title_fullStr Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
title_full_unstemmed Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
title_sort Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia
dc.creator.none.fl_str_mv Masini, Ana Carla Ailín
Rovere, Adriana
Pirk, Gabriela Inés
author Masini, Ana Carla Ailín
author_facet Masini, Ana Carla Ailín
Rovere, Adriana
Pirk, Gabriela Inés
author_role author
author2 Rovere, Adriana
Pirk, Gabriela Inés
author2_role author
author
dc.subject.none.fl_str_mv ARID ZONES
DORMANCY
MAIHUENIOIDEAE
OPUNTIOIDEAE
PAYUNIA
topic ARID ZONES
DORMANCY
MAIHUENIOIDEAE
OPUNTIOIDEAE
PAYUNIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.5
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Cacti are characteristic plants in arid ecosystems, where they play an important ecological role. Many species are threatened because of habitat destruction and collection for commercial purposes. In South America, Argentina is one of the countries with the greatest cacti richness and endemisms. However, cacti have been scarcely studied, especially the southernmost species. Since the study of cacti’s reproductive biology would help to improve their conservation status, we studied basic physiological aspects of the germination of two endemic species of Argentina and Chile, Maihuenia patagonica (Phil.) Britton & Rose and Maihueniopsis darwinii (Hensl.) F. Ritter var. hickenii (Britton & Rose) R. Kiesling. Germination percentage (G), mean germination time (TMG) and time until germination (IG) of control seeds and seeds subjected to three pre-germinative treatments were evaluated. Treatments were cold moist stratification for 40 days, mechanical scarification with sand and sandpaper, and mechanical scarification with a scalpel. Laboratory assays were performed at 20/10 °C and 12 h light/12 h dark regime during 60 days. In M. patagonica germination in the stratification treatment did not differ from the control, but was higher in the scarification with scalpel. In M. darwinii var. hickenii germination only differed between the stratification and the scarification with scalpel. TMG and IG were higher in the stratification treatment than in the control for M. patagonica, whereas scarification treatments did not differ from the control. As for M. darwinii var. hickenii no differences were detected for TMG, but the IG was lower in the stratification than in the control. Probably both species presents some kind of dormancy, since germination percentages were low (M. patagonica between 8-27 % and M. darwinii var. hickenii between 17-26 %) but seeds presented high viability. Presence of physical dormancy is discarded because control seeds of both species germinated and the presence of non deep physiological dormancy is proposed. The latter was partially overcome by mechanical scarification in M. patagonica. These results are a new contribution to the study of cacti in South America and could help to develop in situ conservation strategies through the restoration of degraded areas.
Fil: Masini, Ana Carla Ailín. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Rovere, Adriana. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Pirk, Gabriela Inés. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
description Cacti are characteristic plants in arid ecosystems, where they play an important ecological role. Many species are threatened because of habitat destruction and collection for commercial purposes. In South America, Argentina is one of the countries with the greatest cacti richness and endemisms. However, cacti have been scarcely studied, especially the southernmost species. Since the study of cacti’s reproductive biology would help to improve their conservation status, we studied basic physiological aspects of the germination of two endemic species of Argentina and Chile, Maihuenia patagonica (Phil.) Britton & Rose and Maihueniopsis darwinii (Hensl.) F. Ritter var. hickenii (Britton & Rose) R. Kiesling. Germination percentage (G), mean germination time (TMG) and time until germination (IG) of control seeds and seeds subjected to three pre-germinative treatments were evaluated. Treatments were cold moist stratification for 40 days, mechanical scarification with sand and sandpaper, and mechanical scarification with a scalpel. Laboratory assays were performed at 20/10 °C and 12 h light/12 h dark regime during 60 days. In M. patagonica germination in the stratification treatment did not differ from the control, but was higher in the scarification with scalpel. In M. darwinii var. hickenii germination only differed between the stratification and the scarification with scalpel. TMG and IG were higher in the stratification treatment than in the control for M. patagonica, whereas scarification treatments did not differ from the control. As for M. darwinii var. hickenii no differences were detected for TMG, but the IG was lower in the stratification than in the control. Probably both species presents some kind of dormancy, since germination percentages were low (M. patagonica between 8-27 % and M. darwinii var. hickenii between 17-26 %) but seeds presented high viability. Presence of physical dormancy is discarded because control seeds of both species germinated and the presence of non deep physiological dormancy is proposed. The latter was partially overcome by mechanical scarification in M. patagonica. These results are a new contribution to the study of cacti in South America and could help to develop in situ conservation strategies through the restoration of degraded areas.
publishDate 2014
dc.date.none.fl_str_mv 2014-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/127077
Masini, Ana Carla Ailín; Rovere, Adriana; Pirk, Gabriela Inés; Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia; Ediciones Univ; Gayana. Botánica; 71; 2; 12-2014; 188-198
0016-5301
0717-6643
CONICET Digital
CONICET
url http://hdl.handle.net/11336/127077
identifier_str_mv Masini, Ana Carla Ailín; Rovere, Adriana; Pirk, Gabriela Inés; Requerimientos pregerminativos de maihuenia patagonica y maihueniopsis darwinii, cactáceas endémicas de patagonia; Ediciones Univ; Gayana. Botánica; 71; 2; 12-2014; 188-198
0016-5301
0717-6643
CONICET Digital
CONICET
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-66432014000200002
info:eu-repo/semantics/altIdentifier/doi/10.4067/S0717-66432014000200002
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Ediciones Univ
publisher.none.fl_str_mv Ediciones Univ
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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