Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to Brazil
Abstract Lychnophorinae comprises 19 genera and 117 species. Its representatives are found mostly in the rocky grasslands (“campos rupestres”) of Minas Gerais, Bahia, and Goiás States, Brazil. This study presents a palynological investigation of 10 species belonging to the genus Piptolepis, endemic...
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Academia Brasileira de Ciências
2022-01-01
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| Series: | Anais da Academia Brasileira de Ciências |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000100903&tlng=en |
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| author | RAQUEL M.B. SOUZA-SOUZA GRACE K.R. DE SOUSA ROBERTO L. ESTEVES CLAUDIA B.F. MENDONÇA VANIA GONÇALVES-ESTEVES |
| author_facet | RAQUEL M.B. SOUZA-SOUZA GRACE K.R. DE SOUSA ROBERTO L. ESTEVES CLAUDIA B.F. MENDONÇA VANIA GONÇALVES-ESTEVES |
| author_sort | RAQUEL M.B. SOUZA-SOUZA |
| collection | DOAJ |
| description | Abstract Lychnophorinae comprises 19 genera and 117 species. Its representatives are found mostly in the rocky grasslands (“campos rupestres”) of Minas Gerais, Bahia, and Goiás States, Brazil. This study presents a palynological investigation of 10 species belonging to the genus Piptolepis, endemic to the rocky grasslands of the Espinhaço Mountains, in Minas Gerais State. The plant material used in this investigation was obtained from specimens deposited in Brazilian herbaria. Pollen grains were processed by the acetolysis method, measured, described, and photomicrographed in light microscopy and scanning electron microscopy. Morphological observations revealed Piptolepis pollen to be large, prolate spheroidal in most species, 3-colporate, ectoapertures long, sexine subechinolophate or sublophate. Endoapertures vary from almost circular, lalongate or lalongate, with a median constriction observed only in three species. Three types of spines were identified: prostrate and disorganized, elongated and narrow, and conical, erect, apex acute in the other species. This first palynological study of Piptolepis species allowed the separation of representatives of the genus using pollen keys. The most significant characters were pollen shape, ornamentation, endoaperture, and presence of median constriction in the endoaperture. The findings presented here do not support the infrageneric classification of Piptolepis, as pollen characters were not unique to any section. |
| first_indexed | 2024-12-18T02:49:53Z |
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| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-12-18T02:49:53Z |
| publishDate | 2022-01-01 |
| publisher | Academia Brasileira de Ciências |
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| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-8009ac42b33749479e866584e50da8082022-12-21T21:23:29ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902022-01-0194110.1590/0001-3765202220201244Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to BrazilRAQUEL M.B. SOUZA-SOUZAhttps://orcid.org/0000-0001-6658-7957GRACE K.R. DE SOUSAhttps://orcid.org/0000-0001-8509-2204ROBERTO L. ESTEVEShttps://orcid.org/0000-0002-2884-9538CLAUDIA B.F. MENDONÇAhttps://orcid.org/0000-0003-4219-6147VANIA GONÇALVES-ESTEVEShttps://orcid.org/0000-0002-2803-6027Abstract Lychnophorinae comprises 19 genera and 117 species. Its representatives are found mostly in the rocky grasslands (“campos rupestres”) of Minas Gerais, Bahia, and Goiás States, Brazil. This study presents a palynological investigation of 10 species belonging to the genus Piptolepis, endemic to the rocky grasslands of the Espinhaço Mountains, in Minas Gerais State. The plant material used in this investigation was obtained from specimens deposited in Brazilian herbaria. Pollen grains were processed by the acetolysis method, measured, described, and photomicrographed in light microscopy and scanning electron microscopy. Morphological observations revealed Piptolepis pollen to be large, prolate spheroidal in most species, 3-colporate, ectoapertures long, sexine subechinolophate or sublophate. Endoapertures vary from almost circular, lalongate or lalongate, with a median constriction observed only in three species. Three types of spines were identified: prostrate and disorganized, elongated and narrow, and conical, erect, apex acute in the other species. This first palynological study of Piptolepis species allowed the separation of representatives of the genus using pollen keys. The most significant characters were pollen shape, ornamentation, endoaperture, and presence of median constriction in the endoaperture. The findings presented here do not support the infrageneric classification of Piptolepis, as pollen characters were not unique to any section.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000100903&tlng=enrocky grasslandsLychnophorinaeMinas Geraispalynotaxonomypollen |
| spellingShingle | RAQUEL M.B. SOUZA-SOUZA GRACE K.R. DE SOUSA ROBERTO L. ESTEVES CLAUDIA B.F. MENDONÇA VANIA GONÇALVES-ESTEVES Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to Brazil Anais da Academia Brasileira de Ciências rocky grasslands Lychnophorinae Minas Gerais palynotaxonomy pollen |
| title | Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to Brazil |
| title_full | Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to Brazil |
| title_fullStr | Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to Brazil |
| title_full_unstemmed | Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to Brazil |
| title_short | Importance of palynology in the taxonomy of Piptolepis Sch.Bip. (Asteraceae: Lychnophorinae), a genus endemic to Brazil |
| title_sort | importance of palynology in the taxonomy of piptolepis sch bip asteraceae lychnophorinae a genus endemic to brazil |
| topic | rocky grasslands Lychnophorinae Minas Gerais palynotaxonomy pollen |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000100903&tlng=en |
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