Pollen morphology of Rubiaceae from Cerrado forest fragments: Pollen unit, polarity and diversity of the types of apertures

Dutra, Fernanda Vitorete; Bellonzi, Talita Kely; Souza, Cintia Neves de; Gasparino, Eduardo Custódio

doi:10.1016/j.revpalbo.2020.104297

Cited by 13 publications

(7 citation statements)

References 49 publications

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“…When we compare the quantitative data of Solanaceae pollen grains with recent studies conducted in the same area (forest fragments from Cerrado), we can verify that the values of diameters combined with aperture measurements are also important for species segregation in Fridericia (Souza & Gasparino 2014), Malpighiaceae (Belonsi & Gasparino 2015) and Sapindaceae (Bellonzi et al 2020). For Bignoniaceae (Souza et al 2019) and Rubiaceae (Dutra et al 2020) species, the pollen grain diameters associated with other metric data help the recognition of some taxa. The same is true when considering the measurements of apertures for the studies with Rutaceae (Dutra & Gasparino 2018) and Caesalpinioideae (Soares et al 2021).…”

Section: Discussionsupporting

confidence: 54%

“…Some studies on the pollen of native species from remaining forest fragments of Cerrado indicate variations in shape, aperture, amb, ornamentation and size of the pollen grains (Souza & Gasparino 2014;Belonsi & Gasparino 2015;Dutra & Gasparino 2018;Landi & Gasparino 2018;Souza et al 2019;Bellonzi et al 2020;Dutra et al 2020 andSoares et al 2021); therefore, the aim of this study was to identify morphological characteristics in pollen grains of Solanaceae species, in order to contribute with the palynology, taxonomy and conservation of these species in degraded areas. This analysis also intended to identify which morphological characters of the pollen grains are important in the segregation of native Solanaceae species in Cerrado forest fragments.…”

Section: Introductionmentioning

confidence: 99%

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A taxonomic aid arising from pollen grains of Cestrum L. and Solanum L. (Solanaceae): differences in ornamentation and aperture

2021

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Solanaceae is represented by herbs, shrubs, trees and climbing plants and has cosmopolitan distribution, with a large number of native species in the Neotropical region. This study aimed to characterize the pollen morphology of ten species of Solanaceae (especially species of Cestrum and Solanum) from Cerrado forest fragments in Brazil, in order to contribute to the palynology, taxonomy and conservation of degraded areas. Pollen grains were acetolysed, measured and photographed using light and scanning electron microscopy. Qualitative data were described, and quantitative data were analyzed statistically according to sample size. Morphologically, the studied pollen grains vary in size (small to medium), amb (subcircular to subtriangular), shape (oblate spheroidal to subprolate), aperture details (very long, long or narrow colpi, rounded or tapered at the polar ends, colpi with margo, sometimes with a fastigium, endoapertures can present costa and median constriction) and ornamentation (psilate, rugulate, striate or microreticulate). We observed rugulate or striate pollen grains without fastigium for Cestrum species, whereas psilate or microreticulate pollen grains with fastigium were observed for Solanum species. Qualitative data on diameters and aperture measurements were also found to be important in characterizing the two genera. The results obtained here confirm Solanaceae as an eurypalynous family.

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Section: Discussionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

A taxonomic aid arising from pollen grains of Cestrum L. and Solanum L. (Solanaceae): differences in ornamentation and aperture

2021

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“…The ornamentation was described by the former authors as microreticulate, while in the present study it was defined as rugulate-reticulate. In relation to Faramea multiflora (also analyzed here), the difference found was in the diameter of the pores, in the presence of vestibule and in the type of ornamentation: microreticulate-striate (Dutra et al 2020) while here the ornamentation was rugulate. Vestibule was not observed in this species, but the presence of annulus was recorded.…”

Section: Discussionmentioning

confidence: 84%

“…Dutra et al (2020) analyzed the pollen grains of Rubiaceae species from Cerrado forest fragments. In this study, 23 species belonging to 16 genera were investigated, among them Coussarea hydrangeifolia , Faramea multiflora and F. stenopetala Mart.…”

Section: Discussionmentioning

confidence: 99%

“…Authors such as Baker (1956) underscored the need for palynological studies within the family. Erdtman (1952Erdtman ( , 1971, Verdcourt (1958), Keraudren-Aymonin et al (1969), Melhem et al (1974), Darwin (1979), Jung-Mendac ¸olli (1984), Jung-Mendac¸olli and Melhem (1995), Dessein et al (2005), Gonc ¸alves-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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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 Rubiaceae from Cerrado forest fragments: Pollen unit, polarity and diversity of the types of apertures

Cited by 13 publications

References 49 publications

A taxonomic aid arising from pollen grains of Cestrum L. and Solanum L. (Solanaceae): differences in ornamentation and aperture

A taxonomic aid arising from pollen grains of Cestrum L. and Solanum L. (Solanaceae): differences in ornamentation and aperture

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

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

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