Pollen morphology of Crotonoideae (Euphorbiaceae) from Seasonally Dry Tropical Forests, Northeastern Brazil

Souza, Lidian R. de; Carneiro‐Torres, Daniela Santos; Saba, Marileide Dias; Santos, Francisco de Assis Ribeiro dos

doi:10.1007/s00606-016-1300-z

Cited by 8 publications

(14 citation statements)

References 29 publications

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“…The pollen morphology of Brasiliocroton includes characteristics that correspond to the general pattern in Crotoneae, mainly for polarity, ornamentation pattern of the exine and aperture type (Nowicke 1994;Souza et al 2016). Nowicke (1994) affirmed that the presence of inaperaturate pollen grains is restricted to eudicotyledons, predominant in Crotonoideae, rare in other taxa of Euphorbiaceae, and could support the monophylly of inaperaturate tribes of the family.…”

Section: Discussionmentioning

confidence: 79%

“…For Croton, the sister group, pila with psilate (Carreira et al 1996), striate (Nowicke 1994;Carreira et al 1996;Lima et al 2007) and plicate (Souza et al 2016) surfaces have been reported. Further, the apices can be rounded (Nowicke 1994) or, less frequently, pointed (Carreira et al 1996).…”

Section: Discussionmentioning

confidence: 97%

“…In B. mamoninha the pila were mostly subtriangular and in B. muricatus they were subcircular to circular. Souza et al (2016) studied the pollen morphology of four genera of Crotonoideae and also observed variations in pilum shape. Further, when using this character, the authors could group the representatives of the genus Manihot since they all had notably triangular pila.…”

Section: Discussionmentioning

confidence: 99%

“…To standardize the sample, measurements were made from 25 randomly selected pollen grains from at least five slides. The morphometric parameters, such as sexine and nexine thickness, diameter of the rosettes, diameter of the pila and diameter of the central space of the rosette, were measured as illustrated by Souza et al (2016); ten randomly selected pollen grains were measured.…”

Section: Pollen Descriptionmentioning

confidence: 99%

“…Palynologically, the family Euphorbicaeae has been well investigated and studies have found great morphological diversity for the pollen of its representatives (Erdtman 1952 ;Punt 1962;Allem 1993;Nowicke 1994;Lobreau-Callen & Cervera 1997;Souza et al 2016). The eurypalynous character allows for morphopalynological inferences that can contribute to taxonomic decisions and understanding relationships between taxa (Erdtman 1952).…”

Section: Introductionmentioning

confidence: 99%

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Pollen morphology and exine ultrastructure of Brasiliocroton P.E. Berry & Cordeiro (Euphorbiaceae)

2019

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The present study aimed to morphologically characterize the pollen grains of species of Brasiliocroton mamoninha and B. muricatus in order to expand palynological knowledge of the group and provide additional micromorphological information useful for studies of the relationships within Crotoneae. Polleniferous material was acetolysed and described using light, scanning electron and transmission microscopy. The pollen grains of the two species of Brasiliocroton were apolar, spherical, inaperaturate and medium-sized with a Croton ornamentation pattern. The Croton pattern of B. mamoninha is formed by subtriangular pila, >5-plicate with pointed apices, while for B. muricatus it is formed by subcircular to circular pila, <5-plicate with rounded apices. Ultrastructural analysis revealed a stratified sexine in both species, whereas variation in the pattern of deposition of the foot layer allowed the species to be palynologically distinguished from each other. The composition of the Croton pattern of ornamentation, the morphology of the ultrastructure of the wall and the range of variation in the diameter of the pollen grains differed between the studied species, and thus are diagnostic characters. Pollen morphology allowed the two species of Brasiliocroton to be palynologically separated, and provided data that will be useful for taxonomically circumscribing these taxa.

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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Pollen Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pollen morphology and exine ultrastructure of Brasiliocroton P.E. Berry & Cordeiro (Euphorbiaceae)

2019

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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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Pollen morphology and evolution in Astraea (Euphorbiaceae: Crotoneae)

et al. 2020

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Pollen morphology of Crotonoideae (Euphorbiaceae) from Seasonally Dry Tropical Forests, Northeastern Brazil

Cited by 8 publications

References 29 publications

Pollen morphology and exine ultrastructure of Brasiliocroton P.E. Berry & Cordeiro (Euphorbiaceae)

Pollen morphology and exine ultrastructure of Brasiliocroton P.E. Berry & Cordeiro (Euphorbiaceae)

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

Pollen morphology and evolution in Astraea (Euphorbiaceae: Crotoneae)

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