Pollen morphology of the genera Polygonum s. str. and Polygonella (Polygoneae: Polygonaceae)

Hong, Suk‐Pyo; Oh, Il-Chan; Craene, Louis P. Ronse De

doi:10.1007/s00606-005-0334-4

Cited by 24 publications

(23 citation statements)

References 16 publications

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“…A weak point for pollen fossils is the limited availability of morphological characteristics in some groups [40 and references therein], [47]. In Polygonaceae however, pollen morphology is a character of potentially great phylogenetic value [11], [63]–[65]. For example, in Polygonum the ektexine clearly differentiates the four recognized sections in the genus.…”

Section: Discussionmentioning

confidence: 99%

“…For example, in Polygonum the ektexine clearly differentiates the four recognized sections in the genus. Persicaria , which had been included in Polygonum until recent molecular analyses showed that it is not closely related to this group [66]–[68], has a rather different pollen type as well [11], [63]–[65]. It is also important to note that one character that supports the segregation of Duma from Muehlenbeckia [22] is that they have a completely different pollen morphology as evidenced by Scanning Electron Microscopy data.…”

Section: Discussionmentioning

confidence: 99%

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Age Estimates for the Buckwheat Family Polygonaceae Based on Sequence Data Calibrated by Fossils and with a Focus on the Amphi-Pacific Muehlenbeckia

2013

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The buckwheat family Polygonaceae is a diverse group of plants and is a good model for investigating biogeography, breeding systems, coevolution with symbionts such as ants and fungi, functional trait evolution, hybridization, invasiveness, morphological plasticity, pollen morphology and wood anatomy. The main goal of this study was to obtain age estimates for Polygonaceae by calibrating a Bayesian phylogenetic analysis, using a relaxed molecular clock with fossil data. Based on the age estimates, we also develop hypotheses about the historical biogeography of the Southern Hemisphere group Muehlenbeckia. We are interested in addressing whether vicariance or dispersal could account for the diversification of Muehlenbeckia, which has a “Gondwanan” distribution.Eighty-one species of Polygonaceae were analysed with MrBayes to infer species relationships. One nuclear (nrITS) and three chloroplast markers (the trnL-trnF spacer region, matK and ndhF genes) were used. The molecular data were also analysed with Beast to estimate divergence times. Seven calibration points including fossil pollen and a leaf fossil of Muehlenbeckia were used to infer node ages.Results of the Beast analyses indicate an age of 110.9 (exponential/lognormal priors)/118.7 (uniform priors) million years (Myr) with an uncertainty interval of (90.7–125.0) Myr for the stem age of Polygonaceae. This age is older than previously thought (Maastrichtian, approximately 65.5–70.6 Myr). The estimated divergence time for Muehlenbeckia is 41.0/41.6 (39.6–47.8) Myr and its crown clade is 20.5/22.3 (14.2–33.5) Myr old. Because the breakup of Gondwana occurred from 95–30 Myr ago, diversification of Muehlenbeckia is best explained by oceanic long-distance and maybe stepping-stone dispersal rather than vicariance. This study is the first to give age estimates for clades of Polygonaceae and functions as a jumping-off point for future studies on the historical biogeography of the family.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Age Estimates for the Buckwheat Family Polygonaceae Based on Sequence Data Calibrated by Fossils and with a Focus on the Amphi-Pacific Muehlenbeckia

2013

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“…() distinguished five pollen types for north‐western European Polygonum, P. aviculare type, P. bistorta type, P. convolvulus type, P. persicaria type, and P. polystachyum type. The pollen encountered in the Eskihisar samples corresponds to Polygonum aviculare type, with resemblance to the extant P. aviculare L., P. bistorta L., P. maritimum L. and P. patulum M.Bieb., (Nowicke & Skvarla, ; Van Leeuwen et al ., ; Hong, Oh & Ronse de Craene, ). Pollen of Polygonum has previously been reported from the early Miocene of Turkey (Yavuz‐Işık et al ., ).…”

Section: Systematic Palynologymentioning

confidence: 99%

The middle Miocene palynoflora and palaeoenvironments of Eskihisar (Yatağan basin, south-western Anatolia): a combined LM and SEM investigation

et al. 2016

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We investigated a palynological section from middle Miocene sediments at Eskihisar (south‐western Anatolia) to establish biogeographic links of the palynoflora and to infer the palaeoenvironment. Four algal palynomorphs, nine spore taxa, eight gymnosperms, three monocots and 67 dicot pollen types were encountered and investigated using the ‘single grain method’ that combines light microscopy and scanning electron microscopy. Two pollen zones reflect different phases of basin development. Zonal vegetation remained fairly stable across the section and reflects heterogeneous environments including broad‐leaved deciduous forest, subtropical forest and sclerophyllous and semi‐evergreen oak forest. Conifers were accessory elements in the broad‐leaved deciduous forest communities and replaced these at higher elevations. Some herbaceous taxa (Plumbaginaceae) indicate scattered occurrences of sandy and/or rocky soils. Biogeographic affinities are general Northern Hemisphere, North American and East Asian, as also suggested by the macrofossil record. Only two taxa provide potential biogeographic links with the African flora. This suggests that biome shifts of plant taxa between African subtropical/tropical biomes and Anatolian (western Eurasian) temperate forests and shrublands may have been rare in the middle Miocene.

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“…1) as other authors (Ronse De Craene & al., 2004;Galasso & al., 2009) have suggested. Several morphological characters such as similar tepal structure, pollen and floral morphology (Ronse De Craene & Akeroyd, 1988;Ronse De Craene & al., 2004;Hong & al., 2005) corroborate this placement. Galasso & al.…”

Section: Polygoneaementioning

confidence: 99%

Taxonomy of Polygonoideae (Polygonaceae): A new tribal classification

Sánchez

Schuster

Burke

et al. 2011

TAXON

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The subfamily Polygonoideae has a world‐wide distribution and is an important component of many countries’ floras. In this study we present the most comprehensive sampling available to date, including data from three chloroplast genes (matK, ndhF, rbcL) for 82 species in Polygonaceae (54 from Polygonoideae). Based on our results, we propose a new taxonomic classification for Polygonoideae that includes five well‐supported tribes: Calligoneae, Fagopyreae, Persicarieae, Polygoneae, and Rumiceae. Overall, the results from molecular data represent significant progress in understanding the evolutionary relationships of major groups within the family. This classification also provides an assessment of diagnostic morphological characters for the tribes. The present work will promote reevaluation of morphological characters within this diverse group, especially synapomorphies for Polygonoideae, and for tribes with a particularly complex history such as Fagopyreae, Persicarieae, and Polygoneae. A new combination, Fagopyrum tibeticum, is proposed.

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Pollen morphology of the genera Polygonum s. str. and Polygonella (Polygoneae: Polygonaceae)

Cited by 24 publications

References 16 publications

Age Estimates for the Buckwheat Family Polygonaceae Based on Sequence Data Calibrated by Fossils and with a Focus on the Amphi-Pacific Muehlenbeckia

Age Estimates for the Buckwheat Family Polygonaceae Based on Sequence Data Calibrated by Fossils and with a Focus on the Amphi-Pacific Muehlenbeckia

The middle Miocene palynoflora and palaeoenvironments of Eskihisar (Yatağan basin, south-western Anatolia): a combined LM and SEM investigation

Taxonomy of Polygonoideae (Polygonaceae): A new tribal classification

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