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Shumiaw Chaw - One of the best experts on this subject based on the ideXlab platform.

  • enlarged and highly repetitive plastome of lagarostrobos and plastid phylogenomics of Podocarpaceae
    Molecular Phylogenetics and Evolution, 2019
    Co-Authors: Edi Sudianto, Chungshien Wu, Lars Leonhard, William Martin, Shumiaw Chaw
    Abstract:

    Abstract Podocarpaceae is the largest family in cupressophytes (conifers II), but its plastid genomes (plastomes) are poorly studied, with plastome data currently existing for only four of the 19 Podocarpaceous genera. In this study, we sequenced and assembled the complete plastomes from representatives of eight additional genera, including Afrocarpus, Dacrydium, Lagarostrobos, Lepidothamnus, Pherosphaera, Phyllocladus, Prumnopitys, and Saxegothaea. We found that Lagarostrobos, a monotypic genus native to Tasmania, has the largest plastome (151,496 bp) among any cupressophytes studied to date. Plastome enlargement in Lagarostrobos coincides with increased intergenic spacers, repeats, and duplicated genes. Among the Podocarpaceae, Lagarostrobos has the most rearranged plastome, but its substitution rates are modest. Plastid phylogenomic analyses based on 81 plastid genes clarify the positions of previously conflicting Podocarpaceous genera. Tree topologies firmly support the division of Podocarpaceae into two sister clades: (1) the Prumnopityoid clade and (2) the clade containing Podocarpoid, Dacrydioid, Pherosphaera, and Saxegothaea. The Phyllocladus is nested within the Podocarpaceae, thus familial status of the monotypic Phyllocladaceae is not supported.

  • enlarged and highly repetitive plastome of lagarostrobos and plastid phylogenomics of Podocarpaceae
    bioRxiv, 2018
    Co-Authors: Edi Sudianto, Chungshien Wu, Lars Leonhard, William Martin, Shumiaw Chaw
    Abstract:

    Podocarpaceae is the largest family in cupressophytes (conifers II), but their plastid genomes (plastomes) are poorly studied, with plastome data currently existing for only four of the 19 Podocarpaceous genera. In this study, we assembled the plastomes from representatives of eight additional genera, including Afrocarpus , Dacrydium , Lagarostrobos , Lepidothamnus , Microstrobos , Phyllocladus , Prumnopitys , and Saxegothaea . We found that Lagarostrobos , a monotypic genus native to Tasmania, has the largest plastome among any cupressophytes studied to date (151,496 bp). Plastome enlargement in Lagarostrobos coincides with increased intergenic spacers, repeats, and duplicated genes. Among Podocarpaceae, Lagarostrobos has the most rearranged plastome, but its substitution rates are modest. Plastid phylogenomic analyses clarify the positions of previously conflicting Podocarpaceous genera. Tree topologies firmly support the division of Podocarpaceae into two sister clades: (1) the Prumnopityoid clade and (2) the clade containing Podocarpoid, Dacrydioid, Microstrobos , and Saxegothaea . The Phyllocladus is nested within the Podocarpaceae, thus familial status of the monotypic Phyllocladaceae is not supported.

Robert R Mill - One of the best experts on this subject based on the ideXlab platform.

  • A monographic revision of Retrophyllum (Podocarpaceae)
    Edinburgh Journal of Botany, 2017
    Co-Authors: Robert R Mill
    Abstract:

    In the revision of Retrophyllum published in a previous issue of the Edinburgh Journal of Botany, the barcode for the specimen designated on page 208 line 10 as lectotype of Retrophyllum minus (Carrière) C.N. Page was incorrectly given as P00118110 instead of P00188110.

  • A MONOGRAPHIC REVISION OF RETROPHYLLUM (Podocarpaceae)
    Edinburgh Journal of Botany, 2016
    Co-Authors: Robert R Mill
    Abstract:

    The living species of the genus Retrophyllum C.N. Page (Podocarpaceae) are revised. A key to the six species recognised is given. Retrophyllum filicifolium (N.E.Gray) R.R.Mill comb. nov . from New Guinea and the Moluccas is recognised as a species distinct from R. vitiense (Seemann) C.N. Page, which is restricted to material from Fiji and the Solomon Islands. Additional characters are given by which to separate Retrophyllum piresii (Silba) C.N. Page (Brazil) from R. rospigliosii (Pilg.) C.N. Page (Andes). The six species fall into three species-pairs that differ in reproductive characters: one pair in Papuasia and Melanesia, a second on New Caledonia and a third in South America. In the New Caledonian species-pair, the adult leaves are flattened in four ranks with only minimal heterofacial twisting, whereas in the species-pair inhabiting Fiji, New Guinea and neighbouring areas, as well as the pair inhabiting South America, the adult leaves are arranged in two ranks with significant heterofacial twisting. The names Podocarpus filicifolius N.E.Gray and Nageia minor Carriere, respectively the basionyms of Retrophyllum filicifolium and R. minus , are lectotypified, and the typification of Nageia minor comprehensively discussed in an appendix. Adult female epitypes are additionally designated for Podocarpus filicifolius , which was originally based on juvenile foliage of Retrophyllum mixed with a detached seed of Nageia wallichiana , and for Nageia minor , which Carriere described on the basis of sterile material. Two other appendices provide a list of accepted names and synonyms, and a list of exsiccatae. Illustrations and distribution maps are provided for each species.

  • A MONOGRAPHIC REVISION OF THE GENUS PODOCARPUS (Podocarpaceae): II. THE SPECIES OF THE CARIBBEAN BIOREGION
    Edinburgh Journal of Botany, 2015
    Co-Authors: Robert R Mill
    Abstract:

    The species of Podocarpus L’Her. ex Pers. (Podocarpaceae) occurring on the islands of the Caribbean (excluding Trinidad and Tobago) are revised. Nine species are recognised, of which eight are known to be endemic to the Caribbean Bioregion. None of the species have infraspecific taxa. Four occur on Cuba, two on Hispaniola, two on Jamaica, and one on Puerto Rico and the Lesser Antilles. Keys are provided to all the species and to the species of Cuba, Hispaniola and Jamaica. The distributions of all species are mapped and discussed in relation to the geological history of the region as well as the climate, especially rainfall. The names Podocarpus urbanii Pilg. and Podocarpus buchii var. latifolius Florin are lectotypified. Revised or new IUCN conservation assessments are proposed for Podocarpus angustifolius , P. aristulatus and P. victorinianus and the existing assessments are detailed for the remaining species.

  • cuticle micromorphology of caribbean and central american species of podocarpus Podocarpaceae
    International Journal of Plant Sciences, 2011
    Co-Authors: Darian Stark M Schilling, Robert R Mill
    Abstract:

    The cuticle micromorphology of leaves of 13 species of Podocarpus (Podocarpaceae), nine from the Caribbean Islands and four from Central America, was studied with scanning electron microscopy. They include five of the seven species of section Pumilis (Podocarpus aristulatus, P. buchii, P. ekmanii, P. urbanii, and P. victorinianus), four of the seven species of section Nemoralis (P. guatemalensis, P. hispaniolensis, P. purdieanus, and P. trinitensis), three of the six species of section Lanceolatus (P. coriaceus, P. costaricensis, and P. matudae), and one of the three species of section Pratensis (P. oleifolius). The external and internal features of the adaxial and abaxial cuticles are described for all species and are compared with other known Podocarpus species (especially section Scytopodium). Leaves are hypostomatic, with stomata arranged in discontinuous rows parallel to the leaf axis. The external cuticles of all studied species possessed Florin rings. Stomatal plugs were observed in all species exc...

  • Validations of the names of seven Podocarpaceae macrofossils
    Taxon, 2004
    Co-Authors: Robert R Mill, Robert S. Hill
    Abstract:

    Seven names of macrofossil taxa belonging to Podocarpaceae are here validated; they were all previously published but not validly so under the International Code of Botanical Nomenclature. The names apply to species in the genera Acmopyle Pilg. [A. setiger (Townrow) R. S. Hill & R. J. Carp. ex R. R. Mill & R. S. Hill], Dacrycarpus (Endl.) de Laub. [D. praecupressinus (Ettingsh.) D. R. Greenw. ex R. R. Mill & R. S. Hill], Falcatifolium de Laub. [F eocenicum (D. R. Greenw.) R. S. Hill & L. J. Scriven ex R. R. Mill & R. S. Hill], Prumnopitys Phil. [P tasmanica (Townrow) D. R. Greenw. ex R. R. Mill & R. S. Hill], Sigmaphyllum R. S. Hill & L. J. Scriven [S. australe (D. R. Greenw.) R. S. Hill & L. J. Scriven ex R. R. Mill & R. S. Hill], Smithtonia R. S. Hill & M. Pole [S. lanceolata (D. R. Greenw.) R. S. Hill & M. Pole ex R. R. Mill & R. S. Hill] and Willnngia R. S. Hill & M. Pole [W. maslinensis (D. T. Blackburn) R. S. Hill & M. Pole ex R. R. Mill & R. S Hill]. All these combinations were originally published without exact basionym references; instead, the authors cited the complete pagination of the paper in which the intended basionym was made.

Edi Sudianto - One of the best experts on this subject based on the ideXlab platform.

  • enlarged and highly repetitive plastome of lagarostrobos and plastid phylogenomics of Podocarpaceae
    Molecular Phylogenetics and Evolution, 2019
    Co-Authors: Edi Sudianto, Chungshien Wu, Lars Leonhard, William Martin, Shumiaw Chaw
    Abstract:

    Abstract Podocarpaceae is the largest family in cupressophytes (conifers II), but its plastid genomes (plastomes) are poorly studied, with plastome data currently existing for only four of the 19 Podocarpaceous genera. In this study, we sequenced and assembled the complete plastomes from representatives of eight additional genera, including Afrocarpus, Dacrydium, Lagarostrobos, Lepidothamnus, Pherosphaera, Phyllocladus, Prumnopitys, and Saxegothaea. We found that Lagarostrobos, a monotypic genus native to Tasmania, has the largest plastome (151,496 bp) among any cupressophytes studied to date. Plastome enlargement in Lagarostrobos coincides with increased intergenic spacers, repeats, and duplicated genes. Among the Podocarpaceae, Lagarostrobos has the most rearranged plastome, but its substitution rates are modest. Plastid phylogenomic analyses based on 81 plastid genes clarify the positions of previously conflicting Podocarpaceous genera. Tree topologies firmly support the division of Podocarpaceae into two sister clades: (1) the Prumnopityoid clade and (2) the clade containing Podocarpoid, Dacrydioid, Pherosphaera, and Saxegothaea. The Phyllocladus is nested within the Podocarpaceae, thus familial status of the monotypic Phyllocladaceae is not supported.

  • enlarged and highly repetitive plastome of lagarostrobos and plastid phylogenomics of Podocarpaceae
    bioRxiv, 2018
    Co-Authors: Edi Sudianto, Chungshien Wu, Lars Leonhard, William Martin, Shumiaw Chaw
    Abstract:

    Podocarpaceae is the largest family in cupressophytes (conifers II), but their plastid genomes (plastomes) are poorly studied, with plastome data currently existing for only four of the 19 Podocarpaceous genera. In this study, we assembled the plastomes from representatives of eight additional genera, including Afrocarpus , Dacrydium , Lagarostrobos , Lepidothamnus , Microstrobos , Phyllocladus , Prumnopitys , and Saxegothaea . We found that Lagarostrobos , a monotypic genus native to Tasmania, has the largest plastome among any cupressophytes studied to date (151,496 bp). Plastome enlargement in Lagarostrobos coincides with increased intergenic spacers, repeats, and duplicated genes. Among Podocarpaceae, Lagarostrobos has the most rearranged plastome, but its substitution rates are modest. Plastid phylogenomic analyses clarify the positions of previously conflicting Podocarpaceous genera. Tree topologies firmly support the division of Podocarpaceae into two sister clades: (1) the Prumnopityoid clade and (2) the clade containing Podocarpoid, Dacrydioid, Microstrobos , and Saxegothaea . The Phyllocladus is nested within the Podocarpaceae, thus familial status of the monotypic Phyllocladaceae is not supported.

Peter R Johnston - One of the best experts on this subject based on the ideXlab platform.

  • diversity and distribution of fungal foliar endophytes in new zealand Podocarpaceae
    Fungal Biology, 2009
    Co-Authors: Sucheta Joshee, Barbara Paulus, Duckchul Park, Peter R Johnston
    Abstract:

    The diversity and distribution of fungal endophytes in the leaves of four podocarps (Dacrydium cupressinum, Prumnopitys ferruginea, Dacrycarpus dacrydioides, and Podocarpus totara, all Podocarpaceae) and an angiosperm (Kunzea ericoides, Myrtaceae) occurring in close stands were studied. The effects of host species, locality, and season on endophyte assemblages were investigated. Host species was the major factor shaping endophyte assemblages. The spatial separation of sites and seasonal differences played significant but lesser roles. The mycobiota of each host species included both generalist and largely host-specialised fungi. The host-specialists were often observed at low frequencies on some of the other hosts. There was no clear evidence for family-level specialisation across the Podocarpaceae. Of the 17 species found at similar frequencies on several of the podocarp species, 15 were found also on Kunzea. Many of the endophytes isolated appear to represent species of fungi not previously recognised from New Zealand.

  • Bivallum gen. nov. (Rhytismataceae) on Southern Hemisphere Cupressaceae and Podocarpaceae
    Australian Systematic Botany, 1991
    Co-Authors: Peter R Johnston
    Abstract:

    Bivallum gen. nov. is described with the type species B. zelandicum sp, nov. and five other species: B. diselmatis sp. nov.; B. heterosporum (Butin), comb. nov.; B. microstrobi sp. nov.; B. pilgerodendri (Butin), comb. nov.; B. podocarpi (Butin), comb. nov. The genus is southern hemisphere is distribution, being found on Cupressaceae and Podocarpaceae in Chile, New Zealand and Tasmania.

Sergio A Marenssi - One of the best experts on this subject based on the ideXlab platform.

  • conifer fossil woods from the la meseta formation eocene of western antarctica evidence of Podocarpaceae dominated forests
    Review of Palaeobotany and Palynology, 2014
    Co-Authors: Roberto R Pujana, Sergio N Santillana, Sergio A Marenssi
    Abstract:

    Abstract A new collection of 120 fossil wood samples from early Eocene sediments of the La Meseta Formation is studied. Conifers represent 68% of the total amount of wood samples. The specimens show significant conifer diversity and were placed in seven fossil-species. Samples are assigned to the Podocarpaceae, probably Cupressaceae and Araucariaceae. New fossil-species of Protophyllocladoxylon and Phyllocladoxylon (Podocarpaceae) and two new nomenclatural combinations are proposed. Comments about the systematic position of each genus and species represented are made. The systematic is based on anatomical data and supported by statistical analysis. A PCA of 78 woods and 12 characters was performed to confirm the taxon delimitation and discrete clusters are represented in the plots for most of each species. Phyllocladoxylon antarcticum is the most common wood type followed by Cupressinoxylon , Agathoxylon and other Podocarpaceae. In accordance with previous studies, our samples suggest that during the early Eocene forests of the northeastern part of the Antarctic Peninsula were dominated by conifers, particularly Podocarpaceae.