Pollen types in the Amaranthaceae. Morphology and evolutionary significance

Borsch, Thomas

doi:10.1080/00173139809362658

Cited by 50 publications

(70 citation statements)

References 29 publications

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“…2014). The pollen is pantoporate with moderately vaulted mesoporia and numerous evenly spread microspines (Iresine type pollen, Borsch 1998). As part of on-going research on phylogenetic relationships of the genus (Borsch & al., unpubl.…”

Section: Introductionmentioning

confidence: 99%

trnL-F and rpl16 Sequence Data and Dense Taxon Sampling Reveal Monophyly of Unilocular Anthered Gomphrenoideae (Amaranthaceae) and an Improved Picture of Their Internal Relationships

2009

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The Amaranthaceae-Chenopodiaceae alliance has been the focus of several phylogenetic studies, but major questions concerning the internal relationships of Amaranthaceae still remain unanswered. This study aims to test the monophyly of the subfamily Gomphrenoideae and to examine the generic relationships within this group. Parsimony and Bayesian analyses of trnL-F and rpl16 show that the subfamily Gomphrenoideae is monophyletic. The clade of Gomphrenoideae represents a large and diverse radiation of the Amaranthaceae in the New World. Unilocular anthers are a morphological synapomorphy for Gomphrenoideae that was derived from bilocular anthers. Three major clades are resolved: the Gomphrenoids, the Alternantheroids, and the Iresinoids, which are largely supported by pollen morphology. The Iresinoid clade is sister to Alternantheroids plus Gomphrenoids, rendering metareticulate pollen as the synapomorphy for the latter two clades. Tribes and subtribes delimited by androecium and inflorescence characters are poly- or paraphyletic. Several genera are monophyletic including the large genus Alternanthera, whereas Gomphrena is polyphyletic. Irenella and Woehleria are resolved within Iresine whereas Blutaparon and Lithophila fall within the polyphyletic Gomphrena. The trnL-F and rpl16 sequence data are the most variable chloroplast regions examined to date for the family and are highly effective in resolving relationships in Amaranthaceae.

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Section: Introductionmentioning

confidence: 99%

trnL-F and rpl16 Sequence Data and Dense Taxon Sampling Reveal Monophyly of Unilocular Anthered Gomphrenoideae (Amaranthaceae) and an Improved Picture of Their Internal Relationships

2009

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“…Sexina podendo ser, mais ou menos espessa que a nexina (Erdtman 1952, Salgado-Labouriau 1973, Barth et al 1976, Melhem & Cruz, 1979, Nowicke & Skvarla 1979, Robertson 1981, Eliasson 1988, Borsch 1995, 1998, Telleria 1995, Borsch & Pedersen 1997, Franssen et al 2001, Perveen & Qaiser 2002, Evaldt et al 2009, Bastos et al, 2010, Chin & Lim, 2011, Angelini et al 2014, Magalhães-e-Silva et al, 2016, Sanchez-del-Pino et al, 2016.…”

Section: Discussionunclassified

“…Dentre os estudos citados, os trabalhos de Salgado-Labouriau (1973), Borsch (1995, 1998), Telleria (1995, Borsch & Pedersen (1997) e Bastos et al, (2010) descrevem a morfologia polínica de espécies dos gêneros Hebanthe e Pfaffia. Para esses gêneros os grãos de pólen são descritos como esféricos, possuindo de 10-12 malhas visíveis numa face; pantoporados com poro circular dentro de cada lúmen; sexina reticulada, de malhas grandes, pentagonais ou hexagonais apresentando lados retos; muros altos com teto de superfície espiculada, com espículos dispostos geralmente em linhas, podendo possuir perfurações de forma desigual pelo grão de pólen; muros simplicolumelados ou duplicolumelados, reforços murais cônicos nos vértices das malhas.…”

Section: Discussionunclassified

“…Dentre os trabalhos que analisaram as características polínicas de espécies de Amaranthaceae destacam-se: Erdtman (1952), Salgado-Labouriau (1973), Barth et al (1976), Melhem & Cruz (1979), Nowicke & Skvarla (1979), Robertson (1981), Eliasson (1988), Borsch (1995, 1998), Telleria (1995, Borsch & Pedersen (1997), Franssen et al (2001), Perveen & Qaiser (2002), Melhem et al (2003), Evaldt et al (2009), Bastos et al (2010, Chin & Lim (2011), Angelini et al (2014), Magalhães-e-Silva et al (2016) e Sanchez-del-Pino et al (2016). Para as espécies de Araliaceae, dados palinológicos foram encontados em: Erdtman (1952), Chung & Huang (1972), SalgadoLabouriau (1973), Tseng & Shoup (1978), Tseng et al (1983), Van Helvoort & Punt (1984), Melhem & Bissa (1985), Shang & Callen (1988), Pire (1989), Henwood (1991), Wen & Nowicke (1999), Melhem et al (2003), e Fiaschi et al (2008Fiaschi et al ( , 2010.…”

Section: Introductionmentioning

confidence: 99%

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Palinologia de Amaranthaceae e Araliaceae nativas em fragmentos florestais remanescentes da região noroeste do Estado de São Paulo

Landi

Gasparino

2018

Hoehnea

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-(Palynology of native Amaranthaceae and Araliaceae in forest fragments of the Northwest of São Paulo State). We investigated the pollen morphology of two native species of Amaranthaceae and three of Araliaceae from forest fragments in order to contribute with the palynology, taxonomy, and conservation of degraded areas. The pollen grains were acetolyzed, measured, qualitatively described and photographed using light and scanning electron microscopy. Quantitative data were analyzed by descriptive statistics. The pollen grains of Amaranthaceae are monads, small, apolar, spherical, pantoporate, and with metareticulate exine. For Araliaceae, the pollen grains are monads, small to medium, isopolar, subcircular to subtriangular, oblato-spheroidal to subprolate, 3-colporate, sometimes with vestibulum, lalongate endoaperture and microreticulate exine. The pollen data confi rmed Amaranthaceae as a stenopalynous family. On the other hand, the species of Araliaceae studied characteristically present pollen grains apertures that can be used to differentiate them.

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“…rather than with Iresine. Pollen in Trommsdorffia, Pfaffia and other gomphrenoid genera was later described as metareticulate (Borsch & Barthlott 1998), whereas Iresine type pollen has broadly vaulted mesoporia and evenly spread tectal microspines (Borsch 1998). Ongoing molecular and palynological work on Iresine (Borsch, Flores, Zumaya & Müller, pers.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetics of the neotropical liana genusPedersenia (Amaranthaceae: Gomphrenoideae)and discovery of a new species from Bolivia based on molecules and morphology

2011

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Pollen types in the Amaranthaceae. Morphology and evolutionary significance

Cited by 50 publications

References 29 publications

trnL-F and rpl16 Sequence Data and Dense Taxon Sampling Reveal Monophyly of Unilocular Anthered Gomphrenoideae (Amaranthaceae) and an Improved Picture of Their Internal Relationships

trnL-F and rpl16 Sequence Data and Dense Taxon Sampling Reveal Monophyly of Unilocular Anthered Gomphrenoideae (Amaranthaceae) and an Improved Picture of Their Internal Relationships

Palinologia de Amaranthaceae e Araliaceae nativas em fragmentos florestais remanescentes da região noroeste do Estado de São Paulo

Phylogenetics of the neotropical liana genusPedersenia (Amaranthaceae: Gomphrenoideae)and discovery of a new species from Bolivia based on molecules and morphology

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