Additions to the knowledge of the pollen morphology of some Fabaceae from Cerrado forest patches of Brazil

Soares, Eduardo Lopes; Landi, Lorrayne Albernaz Domingues Camilo; Gasparino, Eduardo Custódio

doi:10.1080/01916122.2020.1804007

Cited by 17 publications

(10 citation statements)

References 27 publications

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“…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: Discussionmentioning

confidence: 84%

“…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: Discussionmentioning

confidence: 84%

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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“…Gupta & Gupta (1979) previously reported variations in the colpus constriction of some species belonging to Leguminosae (e.g., in the genus Crotalaria L.). On the other hand, Soares et al (2020) considered the absence or presence of constriction in pollen grains, along with other palynological traits, to differentiate two legume species from Cerrado. In this study, these constrictions were important for the determination of constricted colpus frequency and to determine how these constrictions prevented the viewing of the endoapertures.…”

Section: Discussionmentioning

confidence: 99%

Pollen morphology of Galactia P. Browne and related genera (Papilionoideae, Leguminosae), with emphasis on Brazilian representatives

et al. 2022

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Galactia is a pantropical genus, which is part of the Galactia clade, and together with the genera Betencourtia, Caetangil, Cerradicola, Collaea, Lackeya, Nanogalactia, and Rhodopis, it maintains a taxonomic relationship that has already been the focus of previous studies. However, the palynology of these groups has not been extensively studied, with gaps in pollen descriptions. Thus, a palynological study of 30 species belonging to Galactia and related genera was performed. For this purpose, pollen grains were acetolized using the standard methodology, subjected to scanning electron microscopy analysis, and then quantitatively and qualitatively evaluated. Generally, pollen grains of this genera are medium or large size, isopolar or heteropolar, 3-colporate, and may have microreticulate or reticulate exine. Pollen data for Rhodopis and Nanogalactia agree with the most recently proposed circumscription of these genera. Other genera exhibited similar pollen characteristics; however, the diameter of the lumen, associated with other pollen characteristics, proved to be important for the differentiation of the genera. Thus, the pollen morphology provided information that contributes to the description of the genera, mainly Brazilian representatives of Galactia and related genera.

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“…Other microscopic techniques include scanning electron microscopy (SEM) which allows a more accurate determination of the type of pollen grain based on differences in surface structures [ 7 , 8 ]. Transmission electron microscopy can provide information on the morphology of internal structures, but with regard to the complexity of processing, it is used mainly for descriptive studies in the field of palynology [ 9 ]. On the other hand, light microscopy is able to recognize far more taxa on species level than scanning electron microscopy [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Identification of pollen taxa by different microscopy techniques

et al. 2021

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Melissopalynology is an important analytical method to identify botanical origin of honey. Pollen grain recognition is commonly performed by visual inspection by a trained person. An alternative method for visual inspection is automated pollen analysis based on the image analysis technique. Image analysis transfers visual information to mathematical descriptions. In this work, the suitability of three microscopic techniques for automatic analysis of pollen grains was studied. 2D and 3D morphological characteristics, textural and colour features, and extended depth of focus characteristics were used for the pollen discrimination. In this study, 7 botanical taxa and a total of 2482 pollen grains were evaluated. The highest correct classification rate of 93.05% was achieved using the phase contrast microscopy, followed by the dark field microscopy reaching 91.02%, and finally by the light field microscopy reaching 88.88%. The most significant discriminant characteristics were morphological (2D and 3D) and colour characteristics. Our results confirm the potential of using automatic pollen analysis to discriminate pollen taxa in honey. This work provides the basis for further research where the taxa dataset will be increased, and new descriptors will be studied.

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Additions to the knowledge of the pollen morphology of some Fabaceae from Cerrado forest patches of Brazil

Cited by 17 publications

References 27 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

Pollen morphology of Galactia P. Browne and related genera (Papilionoideae, Leguminosae), with emphasis on Brazilian representatives

Identification of pollen taxa by different microscopy techniques

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