Pollen morphology of the Brazilian species of Bernardia Houst. ex Mill. and Tragia L. (Euphorbiaceae, Acalyphoideae)

Santos, Mirane de Oliveira; Lima, Luciene Cristina Lima e; Sales, Margareth Ferreira de; Silva, Juliana Santos

doi:10.1590/0102-33062019abb0115

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…(2007), Gonçalves &Lorenzi (2011), andBeentje (2016). Pollen morphology data were gathered from literature (Punt, 1962;Nowicke & al., 1999;Santos & al., 2019) and complemented with new data collected in this study for Adenophaedra megalophylla (Müll.Arg.) Müll.Arg.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Bahiana, a new Euphorbiaceae (Acalyphoideae) genus from seasonally dry forest in northeastern Brazil, corroborated by molecular and morphological evidence

Carrión

Santos

Cordeiro

et al. 2022

TAXON

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After discovering an unknown Euphorbiaceae with an unusual combination of morphological characters, molecular phylogenetic analyses were conducted to evaluate the phylogenetic position of the plant. Results of the analyses support the recognition of a resolved lineage sister to a clade comprising Caryodendron, which is sister to the Adenophaedra + Bernardia clade in subfamily Acalyphoideae. The phylogenetic position of this taxon is also supported by morphology, justifying the description of a new genus and species, Bahiana pyriformis, from the Caatinga seasonally dry forest, in Bahia State, Brazil. We compare morphological characters and discuss the phylogenetic relationships of these four genera, here treated as the Bernardia clade, as well as the possible relationship this clade has with genus Avellanita and tribe Plukenetieae.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Bahiana, a new Euphorbiaceae (Acalyphoideae) genus from seasonally dry forest in northeastern Brazil, corroborated by molecular and morphological evidence

Carrión

Santos

Cordeiro

et al. 2022

TAXON

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“…Similarly, based on pollen morphology, six species of this subfamily in Caatinga Brazil have been analyzed to delimit Acalyphoideae from the taxonomically complex and homogeneous Euphorbioideae (De Souza et al, 2017). Most of the representative tribes of the Acalyphoideae have been studied (Santos et al, 2019; Yang et al, 2020) to contribute the palynological knowledge of these groups. The pollen traits are more variable in the Acalyphoideae as compared to the subfamily Euphorbioideae (De Souza et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Pollen morphology and its implication in the taxonomy of some selected taxa of the bi and tri‐ovulate Euphorbiaceae of the Hainan Island by using multiple microscopic techniques

Bahadur

Taj²,

Long

et al. 2022

Microscopy Res & Technique

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The family Euphorbiaceae is one of the most taxonomically complex and diverse family among the angiosperm. Therefore, this study aims to document the pollen morphology of the Euphorbiaceae taxa collected from different geographical regions of the Hainan Island South China, to strengthen the taxonomy and support the subfamilial classification. The Euphorbiaceae includes 23 species and 10 genera of the biovulate subfamily Phyllanthoideae and tri-ovulate Crotonoideae, Euphorbioideae, and Acalyphoideae were examined under light and scanning electron microscopy. The principal component analysis was performed by using six variables to show variation and relationships between the species. A significant variation was found in the pollen morphology (exine and colpus sculpturing). The croton-type pattern of the pollen was found the diagnostic trait of the Crotonoideae. The Euhphorboideae taxa were mostly homogenous however, variation was found in the muri pattern. The Acalyphoideae, have fossulate scabrate and verrucate exine sculpturing that can delimit from the rest of sub-families. The Phyllanthoideae, showed reticulate exine, tri to tetra-colporate having various colpus morphology. The maximum pollen size was found in Croton hirtus (59.49 Â 60.86 μm) and minimum in Acalypha indica (10.86 Â 73 μm). Similarly, the maximum colpus width was observed in Euphorbia pulcherrima (8.3 μm). Hence pollen traits have relevance in the taxonomy and phylogenetic of the family to define species boundaries at various taxonomic levels. This study can support and strengthen the taxonomy of subfamilies and fill the palynological gap of these taxa in Hainan Island and will contribute to future systematic studies of the Euphorbiaceae. Highlights• Some selected taxa of the four subfamilies including Crotonoideae, Euphorbioideae, Acalyphoideae, and Phyllanthoideae (Euphorbiaceae) were collected from different geographical regions of the Hainan Island.• The pollen of these taxa was observed under both light and scanning electron microscopy.

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A palynological atlas of the Cerrado-Caatinga ecotone in northeastern Brazil

Silva,

Araújo,

Ledru

2024

Review of Palaeobotany and Palynology

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Pollen morphology of the Brazilian species of Bernardia Houst. ex Mill. and Tragia L. (Euphorbiaceae, Acalyphoideae)

Cited by 3 publications

References 17 publications

Bahiana, a new Euphorbiaceae (Acalyphoideae) genus from seasonally dry forest in northeastern Brazil, corroborated by molecular and morphological evidence

Bahiana, a new Euphorbiaceae (Acalyphoideae) genus from seasonally dry forest in northeastern Brazil, corroborated by molecular and morphological evidence

Pollen morphology and its implication in the taxonomy of some selected taxa of the bi and tri‐ovulate Euphorbiaceae of the Hainan Island by using multiple microscopic techniques

A palynological atlas of the Cerrado-Caatinga ecotone in northeastern Brazil

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