Catálogo sistemático  dos pólens das plantas arbóreas do Brasil meridional: XXI - Canellaceae

Barth, Ortrud Monika; Barbosa, Alda Ferreira

doi:10.1590/s0074-02761976000200002

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“…However, several palynologically distinct genera have evolved within the complex. Tripodanthus is readily distinguishable by its unique rodlike sculpturing, a feature also noted by Barth (1972), Tristerix by its sharply projecting colpal margins and interapertural mid-equatorial constrictions, Liguria by its combination of aperture configuration and uniform sculpturing, and Psittacanthus by its tricolpate apertures.…”

Section: @ @mentioning

confidence: 87%

Fine Structure of Mistletoe Pollen. Iii. Large‐flowered Neotropical Loranthaceae and Their Australian Relatives

Feuer

Kuijt

1980

American J of Botany

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Pollen of all large‐flowered neotropical loranthaceous genera and related Australian taxa (Nuytsia, Atkinsonia) were examined in the light, scanning, and transmission electron microscopes. Trilobate, deeply concave, peroblate or oblate pollen shapes are basic within the complex; triangular, slight convex, suboblate shapes are more derived features. The non‐fixiform pollen of Atkinsonia is unique within the family. Most of the large‐flowered genera possess exclusively syncolpate aperture types. However, among Psittacanthus species tricolpate, diplosynrugate and diplorugate apertures are also present, representing derived types for the complex. The inaperturate pollen of Atkinsonia appears to have developed independently within the family. Pollen sculpturing is typically non‐uniform, i.e., there are pronounced sculpturing differences in polar and equatorial regions. Uniformly sculptured pollen is restricted to Atkinsonia, Ligaria and some species of Psittacanthus. Ultrastructurally, most exine modifications have occurred in the equatoral ektexine. Here the basic organization ranges from essentially columellaless to columellate, the latter the more derived condition. Endexine is typically thick and stratified in polar areas, thin and lamellate in peripheral and apertural regions. Similar pollen morphologies of Nuytsia and Gaiadendron support the idea of a transoceanic evolutionary connection between the Old and New Worlds. Pollen characters show Gaiadendron to be the most primitive and Psittacanthus the most advanced among the large‐flowered neotropical genera.

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Section: @ @mentioning

confidence: 87%

Fine Structure of Mistletoe Pollen. Iii. Large‐flowered Neotropical Loranthaceae and Their Australian Relatives

Feuer

Kuijt

1980

American J of Botany

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“…As amostras foram processadas de acordo com o método sugerido como padrão (Ybert et al, 1992), usando-se um volume de 8 cm3 de sedimento, que foi tratado sucessivamente com ácido fluorídrico (HF) a 40%, ácido clorídrico (HCl) a 10%, acetólise clássica e cloreto de zinco (ZnCl2) densidade 2, sendo preparadas 5 lâminas de cada amostra. A identificação dos palinomorfos encontrados teve como base a literatura específica (Barth e colaboradores 1962(Barth e colaboradores -1976Hooghiemstra 1984;Roubik & Moreno 1991) e a coleção de referência do Laboratório de Palinologia (IB/IGEO/UFRJ).…”

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Deposição palinológica atual em sedimentos de superfície do solo no médio vale do rio Paraíba do Sul (Estados de São Paulo e Rio de Janeiro)

2007

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The present investigation aims to contribute to the knowledge of recent pollen deposition in the surface of soils of several types of vegetation, disturbed or not by human activities. In sequence, it intends to establish models of deposition and preservation of palynomorphs in the future. Four sites were selected in the middle valley of Paraíba do Sul river, a region of former coffee plantation: Campinho (municipal district of Bananal, SP), Campo Alegre (municipal district of Arapeí, SP), Fazenda Bahia (municipal district of Resende, RJ) and Cafundó-Colônia (municipal district of Barra Mansa, RJ). The methodology used of samples collection and chemical treatment used the standard methodology in Palynology. The results obtained in all the localities analyzed reflect the current conditions of the regional vegetation, altered by human activities. The localities present a predominance of grasses and ruderal plants, characterizing pasture and grassland vegetation. It was also possible to establish a relationship between the state of preservation of the analyzed palynomorphs, the factors responsible for preservation and the respective environmental implications.

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Literature on vegetational history in latin america. Supplement II

Graham¹

1982

Review of Palaeobotany and Palynology

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Catálogo sistemático dos pólens das plantas arbóreas do Brasil meridional: XXI - Canellaceae

Abstract: Foi estudada a morfologia polínica de três espécies pertencentes a dois gêneros. Os grãos de pólen são semelhantes, guardando em comum características que confirmam a posição filogenética primitiva desta família.

Cited by 5 publications

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Fine Structure of Mistletoe Pollen. Iii. Large‐flowered Neotropical Loranthaceae and Their Australian Relatives

Fine Structure of Mistletoe Pollen. Iii. Large‐flowered Neotropical Loranthaceae and Their Australian Relatives

Deposição palinológica atual em sedimentos de superfície do solo no médio vale do rio Paraíba do Sul (Estados de São Paulo e Rio de Janeiro)

Literature on vegetational history in latin america. Supplement II

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