Atlas de pólen e esporos do Vale do Rio Caí, RS, Brasil

Bauermann, Soraia Girardi; Evaldt, Andreia Cardoso Pacheco; Branco, Sabrina Castelo

doi:10.1590/s0100-67622009000500012

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…The pollen grains of the Celastraceae genera investigated here were previously reported in some studies that describe the pollen diversity in the family (Erdtman 1952; Roubik and Moreno 1991; Nagamitsu and Nagamasu 1994; Bogota and Sánchez 2001; Melhem et al 2003; Cruz-Barros et al 2005; Perveen and Qaiser 2008; Bauermann et al 2009; Cassino and Meyer 2011; Radaeski et al 2014; Cassino et al 2016). However, for Monteverdia dasyclada , M. schummaniana , M. urbaniana and Pristimera celastroides this is the first record of studies of their pollen morphology.…”

Section: Discussionmentioning

confidence: 62%

“…Also regarding Monteverdia , Bauermann et al (2009) described the pollen grains of Monteverdia truncata , previously classified and studied as Maytenus ilicifolia , as monad, small, spherical and tricolporate, with subtriangular amb, and reticulate and homobrochate exine. Radaeski et al (2014) described the pollen grains of this species as monad, small, prolate-spheroidal and tricolporate, with subtriangular amb, long colpi with margo, lalongate endoapertures with rounded ends, and reticulate and homobrochate exine.…”

Section: Discussionmentioning

confidence: 99%

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Contribution to Celastraceae palynology from Cerrado forest fragments: a focus on shape, amb and exine ornamentation

2023

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Forest fragments in the Cerrado are areas of prominent biological importance due to their great species richness and biodiversity. These areas host endemic species of Celastraceae, the knowledge of which contributes to the preservation of this biome. This study aims to characterize the pollen morphology of 10 native species of Celastraceae found in forest fragments in the state of São Paulo, Brazil, contributing to the knowledge of the taxa for future taxonomic studies, and providing data for the conservation of the species in the forest areas. The pollen grains were acetolyzed, measured, described qualitatively and illustrated using light microscopy and scanning electron microscopy. The pollen characters referring to the pollen unit, polarity, type and number of apertures are similar in all the species studied. The shape, amb and exine ornamentation of pollen grains are the diagnostic qualitative morphological data for Celastraceae in this study. Microreticulate pollen grains were observed in Celastrus, Hippocratea and Pristimera; reticulate pollen grains with a very thick exine characterize the analyzed species of Plenckia; and reticulate and microreticulate ornamentation was observed among the species of Monteverdia. The results obtained here allow us to distinguish species of the analyzed genera and confirm the pollen diversity previously reported for Celastraceae.

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Section: Discussionmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Contribution to Celastraceae palynology from Cerrado forest fragments: a focus on shape, amb and exine ornamentation

2023

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“…Pollen morphological data for taxa within the Stryphnodendron clade and outgroups were collected from herbarium specimens (CEN, ESA, and SPSC; acronyms following Thiers, [continuously updated]) and literature sources (Braga et al, 2012;Buril et al, 2010;Caccavari, 2002;de Freitas Cruz et al, 2018;El Ghazali et al, 1997;Flores-Cruz et al, 2006;Irian et al, 2013;Jumah, 1991;Kenrick and Knox, 1982;Lima et al, 2008;Luz et al, 2013;Medina-Acosta et al, 2019;Ribeiro et al, 2018;Santos-Silva et al, 2013;Barth and Yoneshigue, 1966;Barth, 1973Barth, , 1974Bauermann et al, 2009). We also collected data from Guinet and Caccavari (1992), who clustered species together in 'pollen types' according to their pollen traits.…”

Section: Morphological Traitsmentioning

confidence: 99%

Pollen evolution in the Stryphnodendron clade (Leguminosae, Mimoseae)

Barduzzi,

Barros-Souza,

Goicochea

et al. 2024

Preprint

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Pollen morphology is a valuable tool for understanding plant evolution and taxonomy. In the legume family (Leguminosae), tribe Mimoseae exhibits diverse pollen traits, but their taxonomic implications are not consistently considered. The pollen evolution in the Leguminosae family is marked by conservatism, but also suffers influence of evolutionary pressures, which increases diversity. Here we investigated the pollen evolution of the Stryphnodendron clade (Leguminosae, Mimoseae) and how it relates to changes in generic circumscriptions within the clade. We analyzed six morphological traits (three categorical and three continuous) sourced from herbarium specimens and the literature for 44 taxa. Categorical traits comprised number of units in the dispersal unit, outline, and grain pollen ornamentation, while continuous traits encompassed exine thickness, as well as longer and shorter dispersal unit diameters. All characters were mapped over a comprehensive phylogenetic hypothesis for the clade using stochastic character mapping and maximum likelihood estimations. Our results reveal that some traits, such as grain number and outline, are generally more conserved than others, such as pollen ornamentation and continuous traits, which are more labile. Pollen ornamentation is different between two distinct lineages within the Stryphnodendron clade, each including multiple genera. Continuous traits, on the other hand, show a contrasting pattern for the recently described genus Gwilymia. In conclusion, although pollen traits are in general conserved within the Stryphnodendron clade, they support recognition of distinct lineages both above and at the genus level. These findings highlight the importance of incorporating pollen morphology in future assessments of generic delimitation within the legume family.

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“…Pollen and spore concentrations are the number of pollen grains and spores per cm 3 of sediment. We identified pollen grains to the lowest taxonomic level possible using a combination of reference collections of the W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, slides of pollen from Cuba collected by Prof. L. Stuchlik, housed in the same institute, as well as available literature (e.g., Bertrand, 1983;Lozano-García et al, 1995;Melhem et al, 2003;Rull, 2003;Willard et al, 2004;Bauermann et al, 2009;Silva and Santos, 2009;Leal et al, 2011).…”

Section: Pollen Analysismentioning

confidence: 99%