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Title: Micromorphology of the upper anthecium in Mesosetum Steud. and related genera (Poaceae, Arthropogoninae) and its taxonomic applications
Authors: Silva, Anádria Stéphanie da
Ribeiro, André Rodolfo de Oliveira
Sousa, Mayco Werllen dos Santos
Fagg, Christopher William
Falcão, Rosana
Oliveira, Regina Célia de
Assunto:: Gramínea
Botânica - morfologia
Botânica - classificação
Issue Date: Jan-2015
Citation: SILVA, Anádria Stéphanie da et al. Micromorphology of the upper anthecium in Mesosetum Steud. and related genera (Poaceae, Arthropogoninae) and its taxonomic applications. Rodriguésia, Rio de Janeiro, v. 66, n. 2, p. 645-657, jan./jun. 2015. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602015000200645&lng=en&nrm=iso>. Acesso em: 21 mar. 2018. doi: http://dx.doi.org/10.1590/2175-7860201566227.
Abstract: Mesosetum is a Neotropical genus with 25 species, and 21 of them occur in Brazil. Mesosetum forms a clade closely related with Keratochlaena rigidifolia and Tatianyx arnacites. The objective of this work was to establish the taxonomic value of the upper anthecium micromorphology for the group. A total of 96 specimens, representing all Mesosetum species (except M. wrightii), K. rigidifolia and T. arnacites were examined under a scanning electron microscope (SEM). PCA and UPGMA analysis were applied using the micromorphologicalcharacters. Fifithteen useful taxonomic characters were identified. We highlight the following characters to distinguish the Mesosetum species: the presence, type and distribution of papillae on the abaxial surface of the upper lemma; the presence of unicellular macrohairs and bicellular microhairs; presence or absence of silica cells and the structure of the germination lid. The present work shows that the micromorphological characters identified are important taxonomically at the specific level, allowing the species identification in many cases.
Licença:: Rodriguésia - This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License which permits unrestricted non-commercial use, distribution, and reproduction in any medium provided the original work is properly cited (CC BY NC 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602015000200645&lng=en&nrm=iso. Acesso em: 21 mar. 2018.
DOI: http://dx.doi.org/10.1590/2175-7860201566227
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