Pólen de gimnospermas e angiospermas do perfil sedimentar de uma turfeira em São Francisco de Paula, Planalto Leste do Rio Grande do Sul, Sul do Brasil

Leonhardt, Adriana; Lorscheitter, Maria Luísa

doi:10.1590/s0100-84042008000400010

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…Obs. : the pollen of Alnus was found in many Quaternary sedimentary profiles from Rio Grande do Sul, due to exceptional long distance airdispersion from the Andean highland (Lorscheitter 1988;Cordeiro and Lorscheitter 1994;Neves and Lorscheitter 1995;Lorscheitter and Dillenburg 1998;Leal and Lorscheitter 2006;Roth and Lorscheitter 2008;Leonhardt and Lorscheitter 2008;Scherer and Lorscheitter 2009;Macedo et al 2009;Spalding and Lorscheitter 2015 (Figs. 60-61).…”

Section: Urticaceae 2 Figs 54-55mentioning

confidence: 99%

“…Obs. : Along with Alnus, the pollen of Nothofagus was found in many Quaternary sedimentary profiles from southern Brazil, due to the exceptional air dispersion from the Andean Southern highland (Lorscheitter 1988;Cordeiro and Lorscheitter 1994;Neves and Lorscheitter 1995;Lorscheitter and Dillenburg 1998;Roth and Lorscheitter 2008;Leonhardt and Lorscheitter 2008).…”

Section: Urticaceae 2 Figs 54-55mentioning

confidence: 99%

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Gymnosperm and angiosperm pollen grains in Holocene sediments from a paleolagoon in the coastal plain of extreme southern Brazil

Masetto

Lorscheitter

2015

Braz. J. Bot

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Gymnosperm and angiosperm pollen grains in Holocene sediments from a paleolagoon in the coastal plain of extreme southern Brazil). This paper describes pollen grains of three gymnosperms and 31 angiosperms preserved in one Quaternary sedimentary profile of a paleolagoon, Hermenegildo Beach (33°42'S-53°18'W), in the extreme southern coastal plain of Rio Grande do Sul, southern Brazil. We present these data as taxonomic references for paleoenvironmental studies in this region. The profile was collected directly from the vertical slope over an interval covering the last conventional 2600 years, as determined by radiocarbon dating. Chemical processing of the samples was performed according to standard methodology, using HCl, HF, KOH, and acetolysis, and analyses were performed on light microscopy. The pollen material was found during the counts of 300 pollen grains in each sample, controlled by saturation curves. Descriptions and illustrations are included, along with ecological data from the original organisms. The high taxonomic diversity found in this study will enhance subsequent plant successional studies, which are essential to paleoenvironmental reconstructions of the coastal plain of southern Brazil.

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Section: Urticaceae 2 Figs 54-55mentioning

confidence: 99%

Section: Urticaceae 2 Figs 54-55mentioning

confidence: 99%

Gymnosperm and angiosperm pollen grains in Holocene sediments from a paleolagoon in the coastal plain of extreme southern Brazil

Masetto

Lorscheitter

2015

Braz. J. Bot

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“…According to Leonhardt and Lorscheitter (2008), the pollen grains of Mimosa are small, oblate or oblatespheroidal, with few pores distanced and irregularly distributed. The species analyzed in the present study did not possess these forms, but these differences may be related to the variability and fragility of the pollen units.…”

Section: Discussionmentioning

confidence: 99%

Pollen morphology of selected species of tribes Ingeae and Mimoseae (Mimosoideae—Leguminosae) occurring in the Atlantic Forest of the state of Rio de Janeiro, Brazil

Cruz

Mendonça

2017

Braz. J. Bot

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The present work investigates the pollen of 14 taxa of the subfamily Mimosoideae (Leguminosae) occurring in the Atlantic Forest of the state of Rio de Janeiro, Brazil. The objective was to characterize the pollen grains of representatives of the subfamily Mimosoideae and to offer the knowledge for the taxonomy. Pollen grains were acetolyzed, measured, described and illustrated using light microscopy. Surface and aperture detail of non-acetolyzed pollen grains were observed and electromicrographed using scanning electron microscopy. The data were statistically analyzed in accordance with sample size. Only polyads were observed in the tribe Ingeae (Abarema Pittier, Albizia Durazz., Calliandra Benth. and Inga Mill.), while two types of pollen units were found in the tribe Mimoseae; the bitetrad type (Mimosa bimucronata (DC) Kuntze, Mimosa elliptica Benth., Mimosa pellita Humb. & Bonpl. ex Willd., and Piptadenia trisperma (Vell.) Benth.); and the polyad type (Anadenanthera colubrina (Vell.) Brenan, Mimosa ceratonia L., and Piptadenia pterosperma (Benth.) Brenan.). Thus, it can be concluded that the present evaluation of palynological characters allowed the separation of majority of the species studied and that the genera of the subfamily are eurypalynous.

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“…Across palynological studies of B. forficata, there are discrepancies regarding the classification of the type of aperture: Leonhardt & Lorscheitter (2008) termed the aperture of B. forficata a colporus, whereas Barth & Bouzada (1964) stated that B. forficata has apertures of the pore type. The observations made in the present study indicate that the apertures of B. forficata should be classified as colpi.…”

Section: Discussionmentioning

confidence: 99%

The systematic value of pollen morphology in trees and shrubs species of Bauhinia L. (Caesalpinioideae- subg. Bauhinia - sect. Pauletia) occurring in Brazil

et al. 2013

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We analyzed the pollen grains of 30 taxa of the genus Bauhinia L., within five series: Aculeatae (9 species); Acuminatae (1 species); Cansenia (17 species); Pentandrae (2 species); and Perlebia (1 species). The pollen grains were acetolysed, after which they were photographed and analyzed under light microscopy. Non-acetolysed pollen grains were analyzed under scanning electronic microscopy. Characters such as shape, size, exine and aperture constitution were studied. The species were separated by a dichotomous key, which showed pollen grains that were classified as very large; isopolar or apolar; oblate, suboblate, oblate spheroidal or spherical; large or small in terms of the polar area; inaperturate, 3-porate or (3-7)-colpate; and microreticulate or reticulate, with or without supratectal elements (gemmae, bacula, clavae). The variation in pollen morphology confirms the eurypalynous status of the genus Bauhinia.

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Pólen de gimnospermas e angiospermas do perfil sedimentar de uma turfeira em São Francisco de Paula, Planalto Leste do Rio Grande do Sul, Sul do Brasil

Cited by 8 publications

References 8 publications

Gymnosperm and angiosperm pollen grains in Holocene sediments from a paleolagoon in the coastal plain of extreme southern Brazil

Gymnosperm and angiosperm pollen grains in Holocene sediments from a paleolagoon in the coastal plain of extreme southern Brazil

Pollen morphology of selected species of tribes Ingeae and Mimoseae (Mimosoideae—Leguminosae) occurring in the Atlantic Forest of the state of Rio de Janeiro, Brazil

The systematic value of pollen morphology in trees and shrubs species of Bauhinia L. (Caesalpinioideae- subg. Bauhinia - sect. Pauletia) occurring in Brazil

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