Pollen morphological studies in the Malvaceae

Christensen, Pia Bro

doi:10.1080/00173138609428890

Cited by 69 publications

(54 citation statements)

References 20 publications

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“…pernambucense (Arruda) Fryxell foi estudada taxonomicamente, na Ilha do Cardoso, por Chiea & Silva (1992) Rao & Lee (1970), Huang (1972) e Christensen (1986) sob Hibiscus tiliaceus, por Barth (1975) sob Hibiscus tiliaceus var. pernambucensis.…”

Section: Espécies Grandezasunclassified

“…Segundo Barth (1975), a espécie apresenta sexina ondulada e perfurada por pontos distintos, enquanto para Rao & Lee (1970) ela é reticulada entre os poros, características aqui confirmadas. Christensen (1986) ressaltou, em H. tiliaceus, a presença de opérculos nos poros, bem como a ocorrência de dois tipos de pólen: um com espinhos longos, delgados e cônicos e outro, mais raro, com espinhos curtos, pontiagudos e freqüentemente distorcidos, estas características não foram observadas no presente estudo. Silva et al (2004), estudaram os grãos de pólen de Hibiscus tiliaceus e H. pernambucensis separadamente, encontrando caracteristicas morfopolínicas diferentes as quais possibilitaram a separação das duas espécies.…”

Section: Espécies Grandezasunclassified

See 1 more Smart Citation

Estudo polínico das espécies de Aquifoliaceae, Euphorbiaceae, Lecythidaceae, Malvaceae, Phytolaccaceae e Portulacaceae ocorrentes na restinga da Ilha do Cardoso (Cananéia, SP, Brasil)

2006

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Section: Espécies Grandezasunclassified

Estudo polínico das espécies de Aquifoliaceae, Euphorbiaceae, Lecythidaceae, Malvaceae, Phytolaccaceae e Portulacaceae ocorrentes na restinga da Ilha do Cardoso (Cananéia, SP, Brasil)

2006

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“…The grain size, the low number of apertures, their size, the spine length and shape, the presence of ± prominent 'spine cushions', the sexine that is as thick or thicker than the nexine, the tectum with granula, are all features that also characterise most genera of Malveae (Saad, 1960;Chaudhuri, 1965;Hanks & Fryxell, 1979;Hill, 1982;Christensen, 1986;Krebs, 1990). This is also true for the studied species of the sister group Fuertesimalva, whose pollen type is indistinguishable from that of Palaua ( Figure 6, Table I).…”

Section: Infra-and Intergeneric Variabilitymentioning

confidence: 99%

Infrageneric variability of pollen morphology in Palaua (Malveae, Malvaceae) and the taxonomic utility of quantitative pollen characters

Schneider

Klie

Kacza

et al. 2009

Grana

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“…4); this type shows pore alignment and exine structure not found in echinate Malvaceae pollen (cf. Christensen, 1986;Culhane & Blackmore, 1988;Naggar, 2004). Present in sample UF15880-7285.…”

Section: From Florissant Fruits and Leaves Of Ulmus Tenuinervismentioning

confidence: 99%

“…-Malvoideae gen. indet. 1 to 4 correspond to extant Malvodieae pollen (Christensen, 1986;Culhane & Blackmore, 1988;Naggar, 2004).…”

Section: Subfamily Malvoideae Burnettmentioning

confidence: 99%

A combined light and scanning electron microscopy study

Bouchal

Zetter

Denk

2016

Grana

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The uppermost Eocene Florissant Formation, Rocky Mountains, Colorado, has yielded numerous insect, vertebrate, and plant fossils. Three previous comprehensive palynological studies investigated sections of lacustrine deposits of the Florissant Formation and documented the response of plant communities to volcanic eruptive phases but overall found little change in plant composition throughout the investigated sections. These studies reported up to 150 pollen and spore phenotypes. In the present paper we used a taxonomic approach to the investigation of dispersed pollen and spores of the Florissant Formation. Sediment samples from the shale units containing macrofossils were investigated using light microscopy (LM) and scanning electron microscopy (SEM). The general picture of the palynoflora is in agreement with previous studies. However, the combined LM and SEM investigation provides important complementary information to previous LM studies. While a fairly large amount of previous pollen determinations could be confirmed, the purported taxonomic affinities of several pollen phenotypes need to be revised. For example, pollen referred to as Podocarpus or Podocarpidites sp. belongs to the Pinaceae Cathaya, Tetracentron). In general, SEM investigations complement the LM palynological studies and improve the identification of dispersed pollen and spores and enable integration of data from dispersed fossil pollen into a wide range of comparative morphological, taxonomic, evolutionary, biogeographic, and phylogenetic studies.

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Pollen morphological studies in the Malvaceae

Cited by 69 publications

References 20 publications

Estudo polínico das espécies de Aquifoliaceae, Euphorbiaceae, Lecythidaceae, Malvaceae, Phytolaccaceae e Portulacaceae ocorrentes na restinga da Ilha do Cardoso (Cananéia, SP, Brasil)

Estudo polínico das espécies de Aquifoliaceae, Euphorbiaceae, Lecythidaceae, Malvaceae, Phytolaccaceae e Portulacaceae ocorrentes na restinga da Ilha do Cardoso (Cananéia, SP, Brasil)

Infrageneric variability of pollen morphology in Palaua (Malveae, Malvaceae) and the taxonomic utility of quantitative pollen characters

A combined light and scanning electron microscopy study

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