Reproductive phenology of Araucaria angustifolia in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Florestal Brasileira (Online) |
Texto Completo: | https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1605 |
Resumo: | The study of reproductive phenology is important in order to determine the proportion of individuals that contributes to the effective gamete pool in a population and to support programs on pollen and seed collection for use in conservation and breeding programs. In araucaria (Araucaria angustifoliaBert. (O. Ktze.), more intensive studies on reproductive biology and phenology are necessary to elucidate the reproductive aspects in different regions. Field observations in an araucaria provenance test planted in Southern Brazil were recorded. The observations were taken when the stand was between 14 and 16 years old. The results showed that its reproductive cycle is relatively long. The most critical stages, including pollination, occur between September and December and the less critical between May and July, when the temperatures are lower. Pollination occurs during a short period and is significantly variable among trees and from year to year. The proportion of sexually mature trees was small at the time of assessment and this limited the effective population size. In spite of the young age of stand, there were significant differences in seed production among provenances. Further observations are necessary encompassing more advanced ages. |
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Reproductive phenology of Araucaria angustifolia in BrazilFenologia reprodutiva da Araucaria angustifolia no BrasilDioiciaPinheiro-do-paranáConservaçãoMelhoramento genético florestalDioiecyParaná-pineGene conservationForest tree improvementThe study of reproductive phenology is important in order to determine the proportion of individuals that contributes to the effective gamete pool in a population and to support programs on pollen and seed collection for use in conservation and breeding programs. In araucaria (Araucaria angustifoliaBert. (O. Ktze.), more intensive studies on reproductive biology and phenology are necessary to elucidate the reproductive aspects in different regions. Field observations in an araucaria provenance test planted in Southern Brazil were recorded. The observations were taken when the stand was between 14 and 16 years old. The results showed that its reproductive cycle is relatively long. The most critical stages, including pollination, occur between September and December and the less critical between May and July, when the temperatures are lower. Pollination occurs during a short period and is significantly variable among trees and from year to year. The proportion of sexually mature trees was small at the time of assessment and this limited the effective population size. In spite of the young age of stand, there were significant differences in seed production among provenances. Further observations are necessary encompassing more advanced ages.O estudo da fenologia reprodutiva indica a proporção de indivíduos que contribuem efetivamente na reprodução, além de oferecer informações básicas para a conservação e melhoramento genéticos florestais. Informações sobre a biologia reprodutiva da araucária (Araucaria angustifolia Bert. (O. Ktze.)) são necessárias para elucidar o comportamento reprodutivo em diferentes regiões de ocorrência da espécie. Este trabalho teve por objetivo efetuar observações em teste de procedência de araucária em Colombo-PR no período entre 14 e 16 anos de idade. Os resultados confirmaram que seu ciclo reprodutivo é relativamente longo. Os estágios mais críticos, incluindo a liberação de pólen e a polinização, ocorrem entre setembro e dezembro e os menos críticos entre maio e julho, coincidindo com as temperaturas amenas. A polinização ocorreu durante um curto período de tempo, que variou significativamente entre árvores de ano para ano. A proporção de árvores reprodutivas foi baixa, implicando na redução do tamanho efetivo da população. Mesmo sendo o plantio relativamente jovem, diferenças notórias foram observadas na produção de sementes entre procedências. Recomendam-se observações adicionais em idades mais avançadas para que se possa tirar conclusões definitivas sobre a produção de sementes em árvores de diferentes procedências e a proporção de sexo na população.Embrapa Florestas2003-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1605Pesquisa Florestal Brasileira; n. 47 (2003): jul./dez.; 19-32Pesquisa Florestal Brasileira; No. 47 (2003): jul./dez.; 19-321983-26051809-3647reponame:Pesquisa Florestal Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1605/636Sousa, Valderês Aparecida deHattemer, Hans H.info:eu-repo/semantics/openAccess2018-03-22T17:55:17Zoai:pfb.cnpf.embrapa.br/pfb:article/1605Revistahttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/PUBhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/oaipfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br1983-26051809-3647opendoar:2018-03-22T17:55:17Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Reproductive phenology of Araucaria angustifolia in Brazil Fenologia reprodutiva da Araucaria angustifolia no Brasil |
title |
Reproductive phenology of Araucaria angustifolia in Brazil |
spellingShingle |
Reproductive phenology of Araucaria angustifolia in Brazil Sousa, Valderês Aparecida de Dioicia Pinheiro-do-paraná Conservação Melhoramento genético florestal Dioiecy Paraná-pine Gene conservation Forest tree improvement |
title_short |
Reproductive phenology of Araucaria angustifolia in Brazil |
title_full |
Reproductive phenology of Araucaria angustifolia in Brazil |
title_fullStr |
Reproductive phenology of Araucaria angustifolia in Brazil |
title_full_unstemmed |
Reproductive phenology of Araucaria angustifolia in Brazil |
title_sort |
Reproductive phenology of Araucaria angustifolia in Brazil |
author |
Sousa, Valderês Aparecida de |
author_facet |
Sousa, Valderês Aparecida de Hattemer, Hans H. |
author_role |
author |
author2 |
Hattemer, Hans H. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Sousa, Valderês Aparecida de Hattemer, Hans H. |
dc.subject.por.fl_str_mv |
Dioicia Pinheiro-do-paraná Conservação Melhoramento genético florestal Dioiecy Paraná-pine Gene conservation Forest tree improvement |
topic |
Dioicia Pinheiro-do-paraná Conservação Melhoramento genético florestal Dioiecy Paraná-pine Gene conservation Forest tree improvement |
description |
The study of reproductive phenology is important in order to determine the proportion of individuals that contributes to the effective gamete pool in a population and to support programs on pollen and seed collection for use in conservation and breeding programs. In araucaria (Araucaria angustifoliaBert. (O. Ktze.), more intensive studies on reproductive biology and phenology are necessary to elucidate the reproductive aspects in different regions. Field observations in an araucaria provenance test planted in Southern Brazil were recorded. The observations were taken when the stand was between 14 and 16 years old. The results showed that its reproductive cycle is relatively long. The most critical stages, including pollination, occur between September and December and the less critical between May and July, when the temperatures are lower. Pollination occurs during a short period and is significantly variable among trees and from year to year. The proportion of sexually mature trees was small at the time of assessment and this limited the effective population size. In spite of the young age of stand, there were significant differences in seed production among provenances. Further observations are necessary encompassing more advanced ages. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-12-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1605 |
url |
https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1605 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1605/636 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Embrapa Florestas |
publisher.none.fl_str_mv |
Embrapa Florestas |
dc.source.none.fl_str_mv |
Pesquisa Florestal Brasileira; n. 47 (2003): jul./dez.; 19-32 Pesquisa Florestal Brasileira; No. 47 (2003): jul./dez.; 19-32 1983-2605 1809-3647 reponame:Pesquisa Florestal Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Florestal Brasileira (Online) |
collection |
Pesquisa Florestal Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br |
_version_ |
1783370936708235264 |