Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features
PREMISE OF THE STUDY: Floral development can help to shed light on puzzling features across flowering plants. The enigmatic Amazonian monospecific genus Petaladenium of the legume family (Leguminosae) had rarely been collected and only recently became available for ontogenetic studies. The fimbriate...
| Autor principal: | Prenner, Gerhard |
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| Outros Autores: | Cardoso, Domingos, Zartman, Charles Eugene, Queiroz, Luciano P. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
American Journal of Botany
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/15878 |
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oai:repositorio:1-15878 |
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oai:repositorio:1-15878 Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features Prenner, Gerhard Cardoso, Domingos Zartman, Charles Eugene Queiroz, Luciano P. Anatomy Dicotyledon Ethanol Flowering Heterogeneity Legume Morphology Ontogeny Stomata Amazonia Fabaceae Magnoliophyta Papilionoidea Papilionoideae Anatomy And Histology Evolution Fabaceae Flower Genetics Growth, Development And Aging Biological Evolution Fabaceae Flowers PREMISE OF THE STUDY: Floral development can help to shed light on puzzling features across flowering plants. The enigmatic Amazonian monospecific genus Petaladenium of the legume family (Leguminosae) had rarely been collected and only recently became available for ontogenetic studies. The fimbriate-glandular wing petals of P. urceoliferum are unique among the more than 19 000 legume species. Ontogenetic data illuminate the systematic position of the genus and foster our understanding on floral evolution during the early diversification of the papilionoid legumes. METHODS: Flower buds were collected in the field, fixed in 70% ethanol, and investigated using scanning electron microscopy (SEM). Results were compared with existing material from early-diverging papilionoid legumes. KEY RESULTS: Formation of sepals and petals shows bidirectional tendencies. Stamens arise in two whorls, and the single carpel arises concomitantly with the outer stamen whorl. Gland formation starts early on the edges of the wing petals. The carpel reopens for a short time when the initiation of ovules is visible. Stomata at the base of the hypanthium indicate that the flower functions like other standard flag blossoms. CONCLUSIONS: The floral ontogeny confirms the close affinity of P. urceoliferum with the florally heterogeneous, early-diverging papilionoid Amburaneae clade. The results strengthen the theory of a distinct experimental phase among early-branching papilionoid legumes during which a wider range of floral morphologies arose. Polysymmetry, monosymmetry, variable organ numbers, and a wide range of ontogenetic patterns laid the foundation for a successful canalization toward the more restricted but well-adapted dorsiventral papilionoid flag blossom. © 2015 Botanical Society of America. 2020-05-19T20:34:04Z 2020-05-19T20:34:04Z 2015 Artigo https://repositorio.inpa.gov.br/handle/1/15878 10.3732/ajb.1500348 en Volume 102, Número 11, Pags. 1780-1793 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf American Journal of Botany |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Anatomy Dicotyledon Ethanol Flowering Heterogeneity Legume Morphology Ontogeny Stomata Amazonia Fabaceae Magnoliophyta Papilionoidea Papilionoideae Anatomy And Histology Evolution Fabaceae Flower Genetics Growth, Development And Aging Biological Evolution Fabaceae Flowers |
| spellingShingle |
Anatomy Dicotyledon Ethanol Flowering Heterogeneity Legume Morphology Ontogeny Stomata Amazonia Fabaceae Magnoliophyta Papilionoidea Papilionoideae Anatomy And Histology Evolution Fabaceae Flower Genetics Growth, Development And Aging Biological Evolution Fabaceae Flowers Prenner, Gerhard Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features |
| topic_facet |
Anatomy Dicotyledon Ethanol Flowering Heterogeneity Legume Morphology Ontogeny Stomata Amazonia Fabaceae Magnoliophyta Papilionoidea Papilionoideae Anatomy And Histology Evolution Fabaceae Flower Genetics Growth, Development And Aging Biological Evolution Fabaceae Flowers |
| description |
PREMISE OF THE STUDY: Floral development can help to shed light on puzzling features across flowering plants. The enigmatic Amazonian monospecific genus Petaladenium of the legume family (Leguminosae) had rarely been collected and only recently became available for ontogenetic studies. The fimbriate-glandular wing petals of P. urceoliferum are unique among the more than 19 000 legume species. Ontogenetic data illuminate the systematic position of the genus and foster our understanding on floral evolution during the early diversification of the papilionoid legumes. METHODS: Flower buds were collected in the field, fixed in 70% ethanol, and investigated using scanning electron microscopy (SEM). Results were compared with existing material from early-diverging papilionoid legumes. KEY RESULTS: Formation of sepals and petals shows bidirectional tendencies. Stamens arise in two whorls, and the single carpel arises concomitantly with the outer stamen whorl. Gland formation starts early on the edges of the wing petals. The carpel reopens for a short time when the initiation of ovules is visible. Stomata at the base of the hypanthium indicate that the flower functions like other standard flag blossoms. CONCLUSIONS: The floral ontogeny confirms the close affinity of P. urceoliferum with the florally heterogeneous, early-diverging papilionoid Amburaneae clade. The results strengthen the theory of a distinct experimental phase among early-branching papilionoid legumes during which a wider range of floral morphologies arose. Polysymmetry, monosymmetry, variable organ numbers, and a wide range of ontogenetic patterns laid the foundation for a successful canalization toward the more restricted but well-adapted dorsiventral papilionoid flag blossom. © 2015 Botanical Society of America. |
| format |
Artigo |
| author |
Prenner, Gerhard |
| author2 |
Cardoso, Domingos Zartman, Charles Eugene Queiroz, Luciano P. |
| author2Str |
Cardoso, Domingos Zartman, Charles Eugene Queiroz, Luciano P. |
| title |
Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features |
| title_short |
Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features |
| title_full |
Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features |
| title_fullStr |
Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features |
| title_full_unstemmed |
Flowers of the early-branching papilionoid legume Petaladenium urceoliferum display unique morphological and ontogenetic features |
| title_sort |
flowers of the early-branching papilionoid legume petaladenium urceoliferum display unique morphological and ontogenetic features |
| publisher |
American Journal of Botany |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/15878 |
| _version_ |
1787144328969191424 |
| score |
11.755432 |