Pollen Morphology of Schefflera (Araliaceae)

Tseng, Charles C.; Shoup, Jane R.

doi:10.2307/2442693

Cited by 13 publications

(8 citation statements)

References 4 publications

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“…To cover the morphological variation within the families I examined a range of taxa in addition to those used in the molecular analyses (specimens studied are listed in Table 3); much information was also gathered from the literature. The following works, in addition to those cited in the text, have been consulted: Harms (1894), Drude (1897), Heintzelman & Howard (1948), Metcalfe & Chalk (1950), Li & Chao (1954), Rodríguez (1957), Ting, Tseng & Mathias (1964), Philipson (1967), Eyde (1967, 1988), Eyde & Tseng (1971), Tseng (1971), Ferguson & Hideux (1978), Tseng & Shoup (1978), Carlquist (1981), Pimenov & Sdobnina (1984), Lowry (1986), Wilkinson (1992, 1998), Dillon & Muñoz‐Schick (1993), Endress (1994), Hellmayr, Kiehn & Webe (1994), Oskolski (1994), Gustafsson (1995), Oskolski, Lowry & Richter (1997), Schatz, Lowry & Wolf (1998), Wen & Nowicke (1999), Oskolski & Lowry (2000), Ackerfield (2001), and Henwood & Hart (2001).…”

Section: Methodsmentioning

confidence: 99%

The family Pennantiaceae and its relationships to Apiales

Kårehed

2003

Botanical Journal of the Linnean Society

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The early evolution of the flowering plant order Apiales is discussed based on information from morphology and DNA sequences from four genes (ndhF, rbcL, atpB and matK). A model‐based approach of analysis, Bayesian inference, is used to analyse the data and the results are compared with those from parsimony analysis. In particular, a new family of the order, the monogeneric Pennantiaceae from New Zealand and Australia, aids in the understanding of how the order originated. The ancestor of Apiales was probably a shrub or small tree with alternate, simple leaves, paniculate inflorescences, five‐merous flowers with free petals, and drupes. © 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003, 141, 1–24.

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Section: Methodsmentioning

confidence: 99%

The family Pennantiaceae and its relationships to Apiales

Kårehed

2003

Botanical Journal of the Linnean Society

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“…Remarks : Morphological similarities are with Araliaceae, e.g. ‘ Schefflera Hoi‐type’ pollen (Tseng & Shoup, ). Pollen of this type falls within the morphological range of the form genus Edmundipollis Konzalová, Słodkowska & Ziembińska‐Tworzydło (Stuchlik 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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“…Similar problem can be noted for Araliaceae subfamily Hydrocotyloideae, Myodocarpaceae and basal lineages of Apiaceae as symplesiomorphies shared by representatives of these groups did not allow for their clear delineation (Ting et al 1964) before the rise of molecular systematics. Tseng provided a detailed description of pollen grains for numerous representatives of Araliaceae (Tseng 1971, 1973, 1974, Tseng & Shoup 1978, Tseng et al 1983 and inferred the utility of palynological data for the taxonomy of the group but incorrect phylogenetic assumptions led him to consider Klotzschia Cham. (actually nested within Apiaceae) as a 'link' between Apiaceae and Araliaceae (Shoup & Tseng 1977).…”

Section: Introductionmentioning

confidence: 99%

<p><strong>Morphology of pollen in Apiales (Asterids, Eudicots)</strong></p>

2021

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In this monograph, for the first time, the pollen morphology was analysed in the context of modern taxonomic treatment of the order and statistically evaluated in search of traits that could be utilised in further taxonomic and evolutionary studies. Our research included pollen sampled from 417 herbarium specimens representing 158 species belonging to 125 genera distributed among all major lineages of Apiales. The pollen was mechanically isolated, acetolysed, suspended in pure glycerine and mounted on paraffin-sealed slides for light microscopy investigation. Although most of the analysed traits were highly homoplastic and showed significant overlap even between distantly related lineages, we were able to construct a taxonomic key based on characters that bear the strongest phylogenetic signal: P/E ratio, mesocolpium shape observed in polar view and ectocolpus length relative to polar diameter. All the investigated traits are easy to observe with light microscopy and defined by clear and well-documented typology. Early diverging lineages of Apiales constitute a distinct group due to subprolate pollen grains (P/E ratio < 1.25). Among four subfamilies of Apiaceae, Mackinlayoideae can be easily identified based on a combination of traits shared with Klotzschia and Platysace—enigmatic umbllifers with highly uncertain phylogenetic position. Pollen of Azorelloideae is much more diverse but retains many plesiomorphic traits found in early-diverging Apioideae. In contrast, Saniculoideae and most representatives of Apioideae are characterised by evolutionary advanced morphology (perprolate pollen grains with relatively short ectocolpus and bone-shaped outline in colpus view). However, it remains unclear whether similarities between Saniculoideae and higher apioids are an example of convergent evolution or reflect common ancestry. Pollen of Hermas shows a unique combination of traits some of which are typical for Azorelloideae while others resemble Saniculoideae.

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Pollen Morphology of Schefflera (Araliaceae)

Cited by 13 publications

References 4 publications

The family Pennantiaceae and its relationships to Apiales

The family Pennantiaceae and its relationships to Apiales

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

<p><strong>Morphology of pollen in Apiales (Asterids, Eudicots)</strong></p>

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