Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Acta Scientiarum Biological Sciences |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/935 |
Resumo: | The leaf architecture, defined as the tri-dimensional organization of the leaves on the stem axis, influences the plant capacity to intercept sun light. This study investigated the leaf architecture of Impatiens walleriana, a species of the understorey of forests, to evaluate the existence of variation among distinctive positions of the leaves and identify the morphological characteristics that influence the leaf overlapping and, consequently, the process of light capture. Thirty plants, under the same light condition, were collected in a remnant of “Floresta Ombrófila Mista” (25º25’S e 49º17’W), in Curitiba, Paraná. Leaf width, leaf length, lamina thickness, leaf area, petiole length, leaf angles, and divergence angles were measured. The mean values of leaf angles, divergence angles, and petiole length varied significantly in relation to leaf position. Apparently, leaf overlapping is minimized by the synergic effect of leaf angles, divergence angles, elliptic form of the lamina, and long petioles, which, together, allow for a spatial organization around the stem axis, where most leaves can receive the difuse light at the understorey forest. These morphological characteristics, associated with reproductive strategies, appear to be responsible for this species´ success on the colonization of disturbed understorey, replacing native vegetation. |
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Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935Arquitetura foliar de Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935folhas de sombrafilotaxia espiraladamorfologia foliarbeijinhoMorfologia VegetalThe leaf architecture, defined as the tri-dimensional organization of the leaves on the stem axis, influences the plant capacity to intercept sun light. This study investigated the leaf architecture of Impatiens walleriana, a species of the understorey of forests, to evaluate the existence of variation among distinctive positions of the leaves and identify the morphological characteristics that influence the leaf overlapping and, consequently, the process of light capture. Thirty plants, under the same light condition, were collected in a remnant of “Floresta Ombrófila Mista” (25º25’S e 49º17’W), in Curitiba, Paraná. Leaf width, leaf length, lamina thickness, leaf area, petiole length, leaf angles, and divergence angles were measured. The mean values of leaf angles, divergence angles, and petiole length varied significantly in relation to leaf position. Apparently, leaf overlapping is minimized by the synergic effect of leaf angles, divergence angles, elliptic form of the lamina, and long petioles, which, together, allow for a spatial organization around the stem axis, where most leaves can receive the difuse light at the understorey forest. These morphological characteristics, associated with reproductive strategies, appear to be responsible for this species´ success on the colonization of disturbed understorey, replacing native vegetation.A arquitetura foliar, definida como a organização tridimensional das folhas no caule, influencia a capacidade da planta em interceptar a luz solar. Este estudo investigou a arquitetura das folhas de Impatiens walleriana que ocorre nos subosques de Floresta Ombrófila Mista para avaliar se existe variação na arquitetura em relação à posição das folhas no eixo caulinar, identificar as características morfológicas que influenciam a sobreposição das folhas e, consequentemente, o processo de captura de luz. Foram coletados 30 indivíduos na mesma condição luminosa, num fragmento de Floresta Ombrófila Mista, Curitiba, Estado do Paraná. Largura, comprimento, espessura, área foliar, comprimento do pecíolo, ângulo foliar e ângulo de divergência foram mensurados. Os valores médios do comprimento do pecíolo e dos ângulos foliares e de divergência variaram significativamente com a posição foliar. Aparentemente, o auto-sombreamento foliar é minimizado pelo efeito sinérgico do ângulo de divergência, do ângulo foliar, da forma elíptica da lâmina e dos pecíolos longos, que, em conjunto, permitem que a maioria das folhas possa receber a luz difusa disponível no interior da floresta. Essas características morfológicas, juntamente com as estratégias reprodutivas, parecem influenciar o sucesso da espécie na colonização de subosques perturbados, substituindo a vegetação nativa.Universidade Estadual De Maringá2009-04-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEstudos morfológicosapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/93510.4025/actascibiolsci.v31i1.935Acta Scientiarum. Biological Sciences; Vol 31 No 1 (2009); 29-34Acta Scientiarum. Biological Sciences; v. 31 n. 1 (2009); 29-341807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/935/935Boeger, Maria ReginaGarcia, Sikandra-Lis Fonseca PaulinelliSoffiatti, Patriciainfo:eu-repo/semantics/openAccess2022-11-23T17:33:02Zoai:periodicos.uem.br/ojs:article/935Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:02Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 Arquitetura foliar de Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 |
title |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 |
spellingShingle |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 Boeger, Maria Regina folhas de sombra filotaxia espiralada morfologia foliar beijinho Morfologia Vegetal |
title_short |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 |
title_full |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 |
title_fullStr |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 |
title_full_unstemmed |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 |
title_sort |
Leaf architecture of Impatiens walleriana Hook. f. (Balsaminaceae) - DOI: 10.4025/actascibiolsci.v31i1.935 |
author |
Boeger, Maria Regina |
author_facet |
Boeger, Maria Regina Garcia, Sikandra-Lis Fonseca Paulinelli Soffiatti, Patricia |
author_role |
author |
author2 |
Garcia, Sikandra-Lis Fonseca Paulinelli Soffiatti, Patricia |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Boeger, Maria Regina Garcia, Sikandra-Lis Fonseca Paulinelli Soffiatti, Patricia |
dc.subject.por.fl_str_mv |
folhas de sombra filotaxia espiralada morfologia foliar beijinho Morfologia Vegetal |
topic |
folhas de sombra filotaxia espiralada morfologia foliar beijinho Morfologia Vegetal |
description |
The leaf architecture, defined as the tri-dimensional organization of the leaves on the stem axis, influences the plant capacity to intercept sun light. This study investigated the leaf architecture of Impatiens walleriana, a species of the understorey of forests, to evaluate the existence of variation among distinctive positions of the leaves and identify the morphological characteristics that influence the leaf overlapping and, consequently, the process of light capture. Thirty plants, under the same light condition, were collected in a remnant of “Floresta Ombrófila Mista” (25º25’S e 49º17’W), in Curitiba, Paraná. Leaf width, leaf length, lamina thickness, leaf area, petiole length, leaf angles, and divergence angles were measured. The mean values of leaf angles, divergence angles, and petiole length varied significantly in relation to leaf position. Apparently, leaf overlapping is minimized by the synergic effect of leaf angles, divergence angles, elliptic form of the lamina, and long petioles, which, together, allow for a spatial organization around the stem axis, where most leaves can receive the difuse light at the understorey forest. These morphological characteristics, associated with reproductive strategies, appear to be responsible for this species´ success on the colonization of disturbed understorey, replacing native vegetation. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-04-14 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Estudos morfológicos |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/935 10.4025/actascibiolsci.v31i1.935 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/935 |
identifier_str_mv |
10.4025/actascibiolsci.v31i1.935 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/935/935 |
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 |
Universidade Estadual De Maringá |
publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Biological Sciences; Vol 31 No 1 (2009); 29-34 Acta Scientiarum. Biological Sciences; v. 31 n. 1 (2009); 29-34 1807-863X 1679-9283 reponame:Acta Scientiarum Biological Sciences instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum Biological Sciences |
collection |
Acta Scientiarum Biological Sciences |
repository.name.fl_str_mv |
Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
||actabiol@uem.br |
_version_ |
1799317391939731456 |