Pollen morphology of some species of Spermacoceae s.s. (Rubiaceae) of the Atlantic Forest, Rio de Janeiro, Brazil

Gonçalves-Esteves, Vânia; Vieira, G. R.; Carvalho, Renata Jacomo Paixão de; Crespo, Sonia Regina de Melo; Mendonça, Cláudia Barbieri Ferreira

doi:10.1590/0102-33062019abb0286

Cited by 9 publications

(7 citation statements)

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“…A palynological study of species of Spermacoceae from the Atlantic Forest, Rio de Janeiro was carried out by Gonçalves-Esteves et al (2020). This study showed that Rubiaceae is a strongly eurypolynic family because the representatives of Spermacoceae are very different from those of the present study, being easily identified by pollen attributes.…”

Section: Discussionmentioning

confidence: 99%

“…For measurements of the equatorial diameter in polar view, apocolpium side, apertures, and exine thickness, 10 measurements were taken per sample. Whenever possible, comparison specimens were analyzed for confirmation of the results (Gonçalves-Esteves et al 2020; Cartaxo-Pinto et al 2022a).…”

Section: Methodsmentioning

confidence: 99%

“…Authors such as Baker (1956) underscored the need for palynological studies within the family. Erdtman (1952, 1971), Verdcourt (1958), Keraudren-Aymonin et al (1969), Melhem et al (1974), Darwin (1979), Jung-Mendaçolli (1984), Jung-Mendaçolli and Melhem (1995), Dessein et al (2005), Gonçalves-Esteves et al (2020), and Dutra et al (2020) classified the family as eurypalynological. From the literature, it can be seen that most palynological studies on Rubiaceae have focused on surveys of regional floras or taxonomic revision.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…The pollen grains were colpate in all studied taxa. Colpate pollen grains have been reported in several genera of the Rubiaceae (Robbrecht 1988; Huysmans et al, 2003; Abdel Khalik et al, 2007; Minareci et al, 2010), but in fact, it is rather a rare feature in the family (D'Hondt et al, 2004; Dessein et al, 2005; Silveira‐Júnior et al, 2012; Gonçalves‐Esteves et al, 2019). Some authors believe that pollen size, shape and colpus numbers cannot identify the species in Rubiaceae family (Huysmans et al, 2003; Minareci et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Erdtman (1952) also described palynologically 230 species belonging to 120 genera of Rubiaceae, including only one species of Rubia belonging to tribe Rubieae. Subsequent systematic studies of the family have proved pollen morphological data to be particularly informative in clarifying evolutionary relationships within Rubiaceae and discussed the taxonomic decisions (Verdcourt 1958; Lewis 1965, 1965b; Bremekamp 1966; Dessein et al, 2005; D'Hondt et al, 2004; Gonçalves‐Esteves et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Pollen morphology and its taxonomic significance of the genus Crucianella L. (Rubiaceae) in Iran

Parsapanah

Faghir

2021

Feddes Repertorium

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The Pollen morphology of nine species of Crucianella L. and ten subspecies of C. gilanica representing two sections: Roseae and Crucianella, was investigated using light microscopy (LM) and scanning electron microscopy (SEM). All the studied species (except for C. angustifolia) are palynologically described here for the first time. The results revealed considerable pollen character variation among the studied species. The pollen grains are monads, isopolar, radial symmetrical and relatively small. The largest pollen grains were observed in C. angustifolia (P = 24.12 µm, E = 26.04 µm), while the smallest pollen was found in C. gilanica subsp. carduchorum (P = 16.32 µm, E = 12.57 µm). The outline pollen grains varied from subcircular to circular in polar view and elliptical to quadrangular and circular in equatorial view. The shape of pollen changed from spheroidal to oblate‐spheroidal, prolate‐spheroidal, suboblate, subprolate and prolate. The pollen grains are zonocolpate and their number of colpi ranges from 6 to 10. The results showed five different types of sexine ornamentation: perforate, reticulate, microreticulate, microfoveolate and psilate. The sexine of all examined specimens is covered with microspines. The current survey shows that the pollen morphological characters of the studies species are taxonomically informative and may provide good help in identification purposes. We used multivariate analysis to determine the potential contribution of palynological data to the species relationships. The result of cluster analysis and principal component analysis showed pollen morphological affinities between the two studied sections.

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Integrating morpho pollinic traits for systematic classification of rubiaceous species and conservation implications

Ullah,

Zafar,

Ahmad

et al. 2024

Genet Resour Crop Evol

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Pollen morphology of some species of Spermacoceae s.s. (Rubiaceae) of the Atlantic Forest, Rio de Janeiro, Brazil

Cited by 9 publications

References 13 publications

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

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

Pollen morphology and its taxonomic significance of the genus Crucianella L. (Rubiaceae) in Iran

Integrating morpho pollinic traits for systematic classification of rubiaceous species and conservation implications

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