Pollen morphology of Bignoniaceae from Brazilian forest fragments and its systematic significance

Souza, Cintia Neves de; Rezende, Andréia Alves; Gasparino, Eduardo Custódio

doi:10.1080/01916122.2018.1476924

Cited by 15 publications

(5 citation statements)

References 20 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: 55%

“…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: 55%

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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“…However, morphological studies rarely describe the pollen types for the family, which could help in the morphological grouping of genera and species. Thus, the aim of this work was to identify pollen types in Sapindaceae and to expand the morphological knowledge of the analyzed species from Brazilian forest fragments, increasing the studies on pollen conducted for the area (Souza & Gasparino 2014;Belonsi & Gasparino 2015;Dutra & Gasparino 2018;Landi &Souza et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Pollen types of Sapindaceae from Brazilian forest fragments: apertural variation

et al. 2020

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“…Tables S1, S2). Character selection and coding were based on the study of herbarium specimens deposited at the herbarium of the University of São Paulo (SPF), the JSTOR Global Plants database (http://plants.jstor.org/), and literature (Urban, 1916; Pichon, 1945; Gomes, 1949; Gentry, 1973; Gentry & Tomb, 1979; Silva‐Castro & al., 2004; Souza & al., 2019). Botanical terminology follows Hickey (1973) for leaf traits, Endress (2010) for inflorescence, and Hesse & al.…”

Section: Methodsmentioning

confidence: 99%

Phylogeny and morphological evolution of the Neotropical genus Cuspidaria (Bignonieae, Bignoniaceae): Combining high‐throughput sequencing and targeted loci data

Francisco,

Fonseca,

Lohmann

2023

TAXON

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The combined use of high‐throughput sequencing (HTS) with targeted loci data offers an excellent opportunity to reconstruct robust and comprehensive phylogenies at fine taxonomic scales using a hybrid approach. In this study, we infer the phylogeny of Cuspidaria (Bignonieae, Bignoniaceae), a diverse clade of lianas and shrubs centered in South America's wet and dry forests. We used HTS to obtain complete or nearly complete plastome sequences of seven individuals of Cuspidaria selected to represent the main clades in the genus. This sampling strategy aimed to reconstruct relationships at deeper nodes (i.e., backbone). We also used targeted loci data obtained through Sanger sequencing to obtain sequences of two chloroplast markers (ndhF, rpl32‐trnL) and one nuclear marker (PepC) for multiple individuals of 18 out of the 21 species of Cuspidaria recognized in the most recent treatment of the genus; only C. emmonsii, C. lachnaea, and C. simplicifolia were not sampled. This broad sampling strategy aimed to test the monophyly of individual species and reconstruct fine‐scale interspecific relationships within the genus. Both datasets were analyzed separately and combined using Bayesian inference and maximum likelihood approaches. The combined dataset includes 65 individuals representing 18 previously recognized species of Cuspidaria plus outgroup taxa. The analysis of the combined dataset recovered a monophyletic Cuspidaria, excluding C. bracteata, which was nested within the outgroup and is best treated elsewhere. Ancestral character state reconstructions provided novel insights into the evolution of morphology and identified multiple putative morphological synapomorphies for key lineages of Cuspidaria. Namely, anthers curved forward was reconstructed as a potential synapomorphy for the Cuspidaria clade, whereas interpetiolar gland fields in stems and inflorescence, subulate or inconspicuous prophylls of the axillary buds, biternate leaves, actinodromous venation, calyx cupulate or spathaceous, calyx apices dentate or irregularly lobed, fruits with winged valves, and fruit midrib limited by two longitudinal ridges were reconstructed as potential synapomorphies of different clades within the genus. Other traits such as habit, tertiary venation, inflorescence type, corolla color, number of ovule series, and pollen unit were highly labile. As circumscribed here, Cuspidaria is composed of eight main clades supported by molecular data and morphological synapomorphies: Sideropogon, Tetrastichella, Cinerea, Paracarpaea, Cremastus, Blepharitheca, Saldanhaea, and Cuspidaria s.str. clades. All species are monophyletic, except for C. pulchra and C. sceptrum, which form a species complex and are best treated as a single taxon. The necessary taxonomic changes are proposed, leading to the recognition of 19 species in Cuspidaria.

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Pollen morphology of Bignoniaceae from Brazilian forest fragments and its systematic significance

Cited by 15 publications

References 20 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 types of Sapindaceae from Brazilian forest fragments: apertural variation

Phylogeny and morphological evolution of the Neotropical genus Cuspidaria (Bignonieae, Bignoniaceae): Combining high‐throughput sequencing and targeted loci data

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