Pollen analysis of representatives of the tribes Ampelopsideae, Cayratieae and Parthenocisseae and evolutionary history of Vitaceae genera

Cartaxo-Pinto, Simone; Jackes, Betsy R.; Marinho, Elysiane de Barros; Gonçalves-Esteves, Vânia; Mendonça, Cláudia Barbieri Ferreira

doi:10.1080/01916122.2021.1998240

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…Unacetolysed pollen grains were mounted on stubs with carbon tape (Cartaxo-Pinto et al 2022) and examined using a FEI Quanta 450 field-emission scanning electron microscope at the Nanotechnology Characterization Center (CENANO), National Institute of Technology, Brazil.…”

Section: Methodsmentioning

confidence: 99%

Palynotaxonomy of species of Dendrophorbium (Asteraceae: Senecioneae) occurring in Brazil

Martins,

Souza-Souza,

Leite

et al. 2023

Palynology

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This article presents a pollen study of 13 species of Dendrophorbium (Asteraceae: Senecioneae) occurring in Brazil. Dendrophorbium has species distributed in the South and Southeast regions of the Brazilian territory that were previously grouped in Senecio Myriocephalus sect. and later Dendrophorbium was elevated to the rank of genus, considering the section Myriocephalus as a synonym of Dendrophorbium. The aim of this study is to advance knowledge of the pollen characteristics of the genus and thus contribute to the taxonomy of the group. The botanical material was collected from specimens deposited in national herbaria. Floral buds were acetolysed for light microscopic analysis. Pollen sediments were mounted on slides with glycerinated gelatin and analyzed under a light microscope. Measurements were taken of the diameters and thickness of exine layers of pollen grains. Examination showed pollen grains to be monadic, isopolar, medium-sized, oblate-spheroidal to pro-late-spheroidal, and 3-colporate. The endoaperture has median constriction in most species, except in D. pellucidinerve. The sexine is thicker than the nexine and echinate, with large perforations at the base of echinae. The exine is caveate. Based on the results, it can be concluded that the pollen grains of the 13 Dendrophorbium species are homogeneous and can be differentiated by aperture shape and dimensions and echinus characteristics.

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Section: Methodsmentioning

confidence: 99%

Palynotaxonomy of species of Dendrophorbium (Asteraceae: Senecioneae) occurring in Brazil

Martins,

Souza-Souza,

Leite

et al. 2023

Palynology

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“…Two factors were considered in the analysis: the percentage of information (variables) needed to form groups and the final number of groups. A dendrogram was constructed using Euclidean distances (Caccavari et al 2008) and Ward's linkage method (Cartaxo-Pinto et al 2022b).…”

Section: Methodsmentioning

confidence: 99%

Palynological diversity of some species of Coussareeae (Rubiaceae) from the Atlantic Forest, Brazil

et al. 2022

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Coussareeae is a neotropical tribe with a complex taxonomic history. Several authors considered it very close to the tribe Psychotrieae owing to similarities in their morphological characteristics, such as solitary ovules. The tribe Coussareeae constitutes the largest basal clade of the subfamily Rubioideae, and most of its genera are well represented in Brazil. The tribe is resolved into three suprageneric clades, including the Coccocypselum and Coussarea-Faramea clades, whose representatives are found in Brazil. This study aimed to ascertain whether pollen attributes corroborate the currently proposed phylogeny and systematics of the tribe. For this, pollen grains of 33 species belonging to the Coccocypselum and Coussarea-Faramea clades were analyzed. Specimens were obtained from herbaria, treated by the acetolysis method, measured, photographed, and described using light and scanning electron microscopy. Morphological analysis showed that pollen grains were medium (25-50 mm) or large (50-100 mm) in size; isopolar or apolar; 2-porate, 3-porate, or 3-colporate; and oblate spheroidal, suboblate, prolate spheroidal, or subprolate. Ornamentation varied among clade representatives. Multivariate analysis of quantitative data revealed that pollen diameter, apocolpium side, pore diameter, colpus length, and endoaperture width were the most significant characters. It can be seen from the results that the studied clades are formed by palynologically distinct genera in terms of polarity, aperture type, and ornamentation. Palynology confirms the proposed taxonomic classification.

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“…Palynological analysis can be used in research on pollination, pollen dispersion, paleoecology, melissopalynology and forensics. Furthermore, it has fundamental importance in the study of ecological and evolutionary characteristics and phylogenetic relationships of different groups of plants (Cancelli et al 2005; Cui et al 2019; Mezzonato-Pires et al 2019; Gonçalves-Esteves et al 2022; Quamar et al 2022; Cartaxo-Pinto et al 2022a, 2022b, 2022c, 2023). The study of pollen grains is a useful tool for elucidating the taxonomy of several botanical families, and circumscribing genera and subgeneric categories (Gonçalves-Esteves et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Cartaxo-Pinto,

Vieira,

Nascimento

et al. 2023

Palynology

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Calea comprises 157 species that occur in the Neotropics. The genus is organized into eight subgenera and 18 sections. Calea sect. Meyeria consists of eight species occurring exclusively in south-central Brazil. In this study, pollen grains from these eight species were sampled from herborized flower buds in pre-anthesis. Pollen samples were acetolyzed, measured, and photographed under a light microscope. Unacetolyzed pollen grains were examined under a scanning electron microscope. The results were used to characterize pollen morphology and construct a palynotaxonomic key for Calea sect. Meyeria. The analyzed pollen grains were monads, isopolar, usually medium-sized, oblate spheroidal, tricolporate, with lalongate endoaperture, the sexine echinate and thicker than the nexine, and six spines in the apocolpium region. The eight species have very similar pollen grains, but some characters are informative for this section, namely pollen size, polar area, sexine ornamentation, and endoaperture characteristics. Despite the similarity of the pollen grains, palynological analysis was able to contribute to the delimitation of Calea species, providing new information for species distinction within Calea sect. Meyeria.

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Pollen analysis of representatives of the tribes Ampelopsideae, Cayratieae and Parthenocisseae and evolutionary history of Vitaceae genera

Cited by 4 publications

References 39 publications

Palynotaxonomy of species of Dendrophorbium (Asteraceae: Senecioneae) occurring in Brazil

Palynotaxonomy of species of Dendrophorbium (Asteraceae: Senecioneae) occurring in Brazil

Palynological diversity of some species of Coussareeae (Rubiaceae) from the Atlantic Forest, Brazil

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

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