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Contribution to the taxonomic elucidation of the Geonoma maxima complex (Arecaceae) in Central Amazonia, Brazil.
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- Author(s): de Souza, Maria Cristina ; de Mendonça, Maria Silvia; Hopkins, Michael John Gilbert; Pinheiro, Fabio; Salatino, Antonio; Brasileiro-Vidal, Ana Christina; Vasconcelos, Santelmo; Ferreira, Evandro Jose Linhares
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Botany. 2023, Vol. 101 Issue 12, p560-569. 10p.- Subject Terms:
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- Subject Terms:
- Abstract: Geonoma maxima (Poit.) Kunth is an example of a species complex, among many others restricted to Neotropical rain forests, which contribute to their high species diversity. Using environmental, morphological, karyological, and molecular data, we aim to test the taxonomic circumscription of 3 of the 11 G. maxima subspecies defined in the latest taxonomic treatment. We evaluated 217 samples of G. maxima complex from Ducke Reserve in the state of Amazonas, Brazil. Environmental preferences were significant at the 0.1% level. Subspecies maxima occurred in the slope, subsp. chelidonura in the floodplain, and subsp. spixiana in the plateau. Leaf morphology and height were different for each subspecies, but not leaf anatomy. The karyotypes of subspp. chelidonura and maxima were symmetrical with 2n = 28 chromosomes, 16 metacentric and 12 submetacentric. Molecular analysis revealed two groups, one comprised subspp. maxima and chelidonura, and the other formed exclusively by subsp. spixiana. At Ducke Reserve, it is clear that the three subspecies are easily recognizable morphologically and ecologically, and it is likely that they do not interbreed locally. However, if these subspecies are analyzed on a larger geographic scale, it may not be possible to separate them. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Botany is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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