Molecular and morphological agreement in Pittosporaceae: phylogenetic analysis with nuclear ITS and plastid<i>trn</i>L–<i>trn</i>F sequence data

Chandler, G. Thomas; Plunkett, Gregory M.; Pinney, S.M.; Cayzer, Lindy; Gemmill, Chrissen E. C.

doi:10.1071/sb07004

Cited by 26 publications

(33 citation statements)

References 36 publications

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“…Forst., Pseudopanax K. Koch, Osmoxylon Miq., Astrotricha DC., Cussonia Thunb., Raukaua Seem., and Harmsiopanax Warb. Because recent molecular data suggest a close relationship of Pittosporaceae to Araliaceae (Plunkett et al, ; Chandler et al, ), Pittosporum illicioides Makino of Pittosporaceae was included as an outgroup taxon. The wide range of multiple taxa was selected to further test the monophyly of Asian Schefflera and to infer the biogeographic diversification with a broader phylogenetic framework.…”

Section: Methodsmentioning

confidence: 99%

Phylogeny and biogeography of Asian Schefflera (Araliaceae) based on nuclear and plastid DNA sequence data

Wen

2013

J of Sytematics Evolution

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The phylogeny of Asian Schefflera was inferred from sequences of the nuclear ribosomal internal transcribed spacer region, and six plastid regions (the ndhF gene, the trnL‐trnF region, the rps16 intron, the atpB‐rbcL intergenic spacer, the rpl16 intron, and the psbA‐trnH intergenic spacer). Phylogenetic analyses of the combined plastid and internal transcribed spacer data with parsimony and Bayesian methods strongly support the monophyly of Asian Schefflera. The genus is supported to be closely related to Heteropanax and Tetrapanax with the small tropical continental Asian genus Heteropanax as its sister. Within Asian Schefflera, four distinct subclades were identified: (i) the widely distributed Asian Heptapleurum group with no styles in the gynoecium; (ii) the main Agalma group with racemose or spicate inflorescence units with a few umbellate taxa; (iii) the Schefflera hypoleuca group; and (iv) the Schefflera heptaphylla group. In a broader phylogenetic framework of Araliaceae, Asian Schefflera is hypothesized to have originated in continental Asia at 57.41 Mya (95% high posterior density interval of 40.33–76.06 Mya) in the early Tertiary and radiated into the now SE Asia, eastern Himalaya, and E Asia at 46.11 Mya (95% high posterior density interval of 33.02–60.69 Mya). Its subsequent diversification in Asia may have been driven largely by the collision of the Indian plate with the Asian plate in the middle Eocene and the collision of the Australian margin with the Eurasian margin in the early Miocene.

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Section: Methodsmentioning

confidence: 99%

Phylogeny and biogeography of Asian Schefflera (Araliaceae) based on nuclear and plastid DNA sequence data

Wen

2013

J of Sytematics Evolution

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“…Historic relationships among New Zealand Pittosporum were inferred using flower position and inflorescence type (Kirk 1899;Cheeseman 1925) and development (heteroblastic vs. monoblastic; Allan 1961). However, recent molecular data do not support this grouping (Hathaway 2001;Chandler et al 2007). Phylogenetic relationships among the genera of Pittosporaceae, including New Zealand Pittosporum, have been assessed using the internal transcribed spacer (ITS) region of nuclear ribosomal DNA (nrDNA), supporting an Australian origin of the family, with all other colonization events from Australia or from subsequent island hopping (Chandler et al 2007).…”

Section: New Zealand Pittosporummentioning

confidence: 99%

“…However, recent molecular data do not support this grouping (Hathaway 2001;Chandler et al 2007). Phylogenetic relationships among the genera of Pittosporaceae, including New Zealand Pittosporum, have been assessed using the internal transcribed spacer (ITS) region of nuclear ribosomal DNA (nrDNA), supporting an Australian origin of the family, with all other colonization events from Australia or from subsequent island hopping (Chandler et al 2007). New Zealand taxa formed two distinct clades; one clade included P. cornifolium, P. pimeleoides subsp.…”

Section: New Zealand Pittosporummentioning

confidence: 99%

“…Relationships between species were postulated based on capsule valve number Á and grouped within either bivalved or trivalved groups (Gowda 1951). However, morphological studies within the genus have been complicated by the abundance of phenotypic plasticity (ecophenetic or heteroblastic) (Chandler et al 2007), and both hybridism and introgression, which skew well-defined discriminating characteristics (Allan 1961). Hence species delimitations and interspecific relationships remain unresolved for some taxa.…”

Section: Taxonomy and Relationshipsmentioning

confidence: 99%

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Biological flora of New Zealand 13.Pittosporum cornifolium, tāwhiri karo, cornel-leaved pittosporum

Clarkson

Gemmill

2012

New Zealand Journal of Botany

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A comprehensive review of the morphology, anatomy, taxonomy, chemistry and ecology of the endemic New Zealand facultative shrub epiphyte Pittosporum cornifolium (Pittosporaceae) is presented. Strong habitat specificity restricts this species to lowland forest and coastal habitats, which are widely yet discontinuously distributed north of latitude 42815?S. Pittosporum cornifolium is typically associated with old growth forest systems and low nutrient substrates, with low mean daily temperatures in the coldest month (B0.6 8C) and high mean October vapour pressure deficits (0.5 kPa) apparently restricting its distribution. Significant morphological variability is evident in leaves and flowers, especially with respect to plants from the Poor Knights Islands. Genetic analyses of five mainland populations and individuals representing Poor Knights Islands populations revealed relatively low genetic diversity at the population level which is likely to be the result of geographic isolation. Molecular phylogenetic studies suggest a New Caledonian origin for the species with close affinities to both P. pimeleoides subspecies. Several lines of evidence suggest recognition of the Poor Knights Islands entity as a new taxon. However, analysis of additional morphological, reproductive and molecular data across the full geographic range will be required to confirm current inferences. Although populations have declined, P. cornifolium is not currently threatened, however, it should be considered for reintroduction to sites in districts where its range has been severely reduced.

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“…Gray and the Tongan P. yunckeri A. C. Sm. (Gemmill et al 2002, Chandler et al 2007). These results support the hypothesis of Fosberg (1948) and Haas (1977) that the Hawaiian Pittosporum lineage is the result of a single long-distance dispersal event (via birds) from the South Pacific.…”

mentioning

confidence: 99%

Pittosporum halophilum Rock (Pittosporaceae: Apiales): Rediscovery, Taxonomic Assessment, and Conservation Status of a Critically Endangered Endemic Species from Moloka'i, Hawaiian Islands

Wood

Kiehn

2011

Pacific Science

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Molecular and morphological agreement in Pittosporaceae: phylogenetic analysis with nuclear ITS and plastidtrnL–trnF sequence data

Cited by 26 publications

References 36 publications

Phylogeny and biogeography of Asian Schefflera (Araliaceae) based on nuclear and plastid DNA sequence data

Phylogeny and biogeography of Asian Schefflera (Araliaceae) based on nuclear and plastid DNA sequence data

Biological flora of New Zealand 13.Pittosporum cornifolium, tāwhiri karo, cornel-leaved pittosporum

Pittosporum halophilum Rock (Pittosporaceae: Apiales): Rediscovery, Taxonomic Assessment, and Conservation Status of a Critically Endangered Endemic Species from Moloka'i, Hawaiian Islands

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