Morphology, germination, and geographic distribution of Pentaclethra macroloba (Fabaceae): a hyperdominant Amazonian tree
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad de Costa Rica
2021
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| _version_ | 1876470846831198208 |
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| author | Adelson Rocha-Dantas |
| author_facet | Adelson Rocha-Dantas |
| contents | Morphology, germination, and geographic distribution of Pentaclethra macroloba (Fabaceae): a hyperdominant Amazonian tree Adelson Rocha-Dantas Marcelino Carneiro-Guedes Caroline-da-Cruz Vasconcelos Jaynna-Gonar Lôbo-Isacksson Dayane-Nathália Barbosa-Pastana Ana-Cláudia Lira-Guedes Maria-Teresa Fernandez-Piedade Biología management pracaxi oil conservation tidal flooding Neotropical tree Introduction: Pentaclethra macroloba is a hyperdominant tree in the Amazon estuary of great socioeconomic importance for the region because the oil from its seeds is a powerful herbal medicine. Objective: We aimed to characterize the morphological structure, the morphological adaptations in response to the daily flooding of the Amazon estuary and the biogeographic area of P. macroloba. Methods: Detailed description of the external morphology, from germination to the adult tree, was obtained from individuals located in floodplain forest, Northeast Amazonia. The occupation area and the geographical extension of P. macroloba were determined from point of geographical coordinates of botanical samples deposited in the digital collections of Mobot and SpeciesLink. Results: Adult individuals have adapted structures in response to daily flooding, such as: adventitious roots to increase respiratory efficiency and lenticels in the trunk, serving as a connection point for oxygen transport between the root and the aerial part. Dried fruit favours the activation of the explosive dehiscence mechanism, allowing the seed to be expelled long distance. Deltoid shape of the seed allows water fluctuation and more efficient dispersal. Seedling is phanerocotylar hypogeal and with one pair of reserve cotyledons that provide the seedling an extra source of energy to escape the flood. Germination rate was 78 % and the speed was 0.2 seeds.day-1. Circular buffer method revealed the presence of 123 subpopulations of P. macroloba distributed in a radius of 5 699 943 km² across the Neotropical region. Conclusions: Much of the morphological structures of P. macroloba are adaptive and evolutionary responses to the periodically flooded environment of the Amazon estuary, showing that these environments select the trees, best adapted, to inhabit the flood. P. macroloba has a wide geographical area denotes the plasticity of adapting to different environments, which may justify its monodominance in some regions. 2021 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44967852015 https://www.redalyc.org/journal/449/44967852015/ https://www.redalyc.org/journal/449/44967852015/html/ https://www.redalyc.org/journal/449/44967852015/44967852015.epub https://www.redalyc.org/journal/449/44967852015/movil 10.15517/rbt.v69i1.43446 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1 Vol.69 |
| format | Artículo científico |
| id | redalyc_44967852015 |
| institution | Redalyc |
| language | en |
| publishDate | 2021 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Morphology, germination, and geographic distribution of Pentaclethra macroloba (Fabaceae): a hyperdominant Amazonian tree Adelson Rocha-Dantas Biología management pracaxi oil conservation tidal flooding Neotropical tree Morphology, germination, and geographic distribution of Pentaclethra macroloba (Fabaceae): a hyperdominant Amazonian tree Adelson Rocha-Dantas Marcelino Carneiro-Guedes Caroline-da-Cruz Vasconcelos Jaynna-Gonar Lôbo-Isacksson Dayane-Nathália Barbosa-Pastana Ana-Cláudia Lira-Guedes Maria-Teresa Fernandez-Piedade Biología management pracaxi oil conservation tidal flooding Neotropical tree Introduction: Pentaclethra macroloba is a hyperdominant tree in the Amazon estuary of great socioeconomic importance for the region because the oil from its seeds is a powerful herbal medicine. Objective: We aimed to characterize the morphological structure, the morphological adaptations in response to the daily flooding of the Amazon estuary and the biogeographic area of P. macroloba. Methods: Detailed description of the external morphology, from germination to the adult tree, was obtained from individuals located in floodplain forest, Northeast Amazonia. The occupation area and the geographical extension of P. macroloba were determined from point of geographical coordinates of botanical samples deposited in the digital collections of Mobot and SpeciesLink. Results: Adult individuals have adapted structures in response to daily flooding, such as: adventitious roots to increase respiratory efficiency and lenticels in the trunk, serving as a connection point for oxygen transport between the root and the aerial part. Dried fruit favours the activation of the explosive dehiscence mechanism, allowing the seed to be expelled long distance. Deltoid shape of the seed allows water fluctuation and more efficient dispersal. Seedling is phanerocotylar hypogeal and with one pair of reserve cotyledons that provide the seedling an extra source of energy to escape the flood. Germination rate was 78 % and the speed was 0.2 seeds.day-1. Circular buffer method revealed the presence of 123 subpopulations of P. macroloba distributed in a radius of 5 699 943 km² across the Neotropical region. Conclusions: Much of the morphological structures of P. macroloba are adaptive and evolutionary responses to the periodically flooded environment of the Amazon estuary, showing that these environments select the trees, best adapted, to inhabit the flood. P. macroloba has a wide geographical area denotes the plasticity of adapting to different environments, which may justify its monodominance in some regions. 2021 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44967852015 https://www.redalyc.org/journal/449/44967852015/ https://www.redalyc.org/journal/449/44967852015/html/ https://www.redalyc.org/journal/449/44967852015/44967852015.epub https://www.redalyc.org/journal/449/44967852015/movil 10.15517/rbt.v69i1.43446 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1 Vol.69 |
| title | Morphology, germination, and geographic distribution of Pentaclethra macroloba (Fabaceae): a hyperdominant Amazonian tree |
| topic | Biología management pracaxi oil conservation tidal flooding Neotropical tree |
| url | https://www.redalyc.org/articulo.oa?id=44967852015 https://www.redalyc.org/journal/449/44967852015/ https://www.redalyc.org/journal/449/44967852015/html/ https://www.redalyc.org/journal/449/44967852015/44967852015.epub https://www.redalyc.org/journal/449/44967852015/movil |