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Auteur Richard M. Bateman |
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Himantoglossum hircinum (Lizard Orchid) reviewed in the light of new morphological and molecular observations / Richard M. Bateman in New Journal of botany, vol. 3, n°2 (Année 2013)
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Titre : Himantoglossum hircinum (Lizard Orchid) reviewed in the light of new morphological and molecular observations Type de document : texte imprimé Auteurs : Richard M. Bateman, Auteur ; Paula J. Rudall, Auteur ; Julie A. Hawkins, Auteur ; Gábor Sramkó, Auteur Année de publication : 2013 Article en page(s) : pp. 122-140 Langues : Anglais (eng) Catégories : [ZG] Royaume-Uni
[Espèces (in biblio)] Himantoglossum hircinum (L.) Spreng.Mots-clés : ontogenèse florale répartition géographique espaceur interne transcrit LEAFY morphométrique changement climatique Résumé : "Himantoglossum hircinum is one of the rarer and more charismatic orchids in the British flora. Morphometric comparison of the two largest and best-known populations in southern England – the coastal dune population at Sandwich and the chalk grassland population at Newmarket – using 46 characters showed that they differ only subtly, the Sandwich plants being on average more vegetatively robust and slightly more darkly pigmented, but possessing less extensive lip-spots and substantially longer ‘arms’. A comparatively morphologically divergent semi-desert population from Ifrane, Morocco differs from the English populations in having broader stems, less recurved ‘arms’, a more strongly down-curved spur and in lacking near-circular spots within the sepals. Molecular comparison of 46 plants, representing 13 English populations and 18 populations from Continental Europe and Morocco, revealed only subtle distinctions in the high-copy nuclear region ITS, and smaller-scale comparisons of the low-copy nuclear (LEAFY) and plastid (four intron) regions proved to be even less discriminatory. These results reinforce prior morphological inferences that H. hircinum is a cohesive species. Scanning electron microscopy elucidated the ontogeny of these remarkable flowers, suggesting that the exceptionally elongate central labellar lobe originated by accelerated heterochronic growth and showing that the characteristic spiral torsion always runs counter-clockwise. Lateral fusion of the paired viscidia is convergent with several other lineages of subtribe Orchidinae. Review of pollination and life-history features of H. hircinum suggest that they are typical of food-deceptive species within Orchidinae. The Lizard Orchid is infamous for geographic mobility; its cycles of expansion and contraction through the last century have been interpreted as reflecting a net northward migration in response to recent climate change. Our data tentatively suggest relatively recent colonisation of Morocco at high altitudes and an overall northwestward direction of migration into the UK. ITS ribotypes indicate multiple immigration events leading to levels of genetic diversity in England comparable with those on the Continent. A non-recent origin is inferred for H. hircinum which, despite recent systematic revisions, may harbour further cryptic species; the taxonomic status of supposed outlying populations in southern Italy in particular is questioned by the present genetic data." (source : auteurs) Type de publication : périodique Référence biblio : Bateman R., Rudall P., Hawkins J., Sramkó G., 2013 - Himantoglossum hircinum (Lizard Orchid) reviewed in the light of new morphological and molecular observations. New Journal of botany, 3 (2) : 122-140. ID PMB : 57097 DOI : 10.1179/2042349713Y.0000000025 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=57097
in New Journal of botany > vol. 3, n°2 (Année 2013) . - pp. 122-140[article]Exemplaires(1)
Cote Localisation Disponibilité P0130-5 Brest Exclu du prêt How many orchid species are currently native to the British Isles ? / Richard M. Bateman
in Current taxonomic research on the British & European Flora (Leicester, 13-14 September 2003) / John Bailey (2006)
Titre : How many orchid species are currently native to the British Isles ? Type de document : texte imprimé Auteurs : Richard M. Bateman, Auteur Importance : pp. 89-110 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Orchidaceae
[ZG] Europe
[Thèmes] GénétiqueMots-clés : classification DNA phylogénétique population génétique Résumé : "The British Isles probably host the most intensively studied flora in the world, and within that flora the Orchidaceae has long been the most intensively studied family. Nonetheless, molecular phylogenetic studies performed only during the last decade have revolutionised our understanding of species relationships among European orchids, eliminating former monotypic genera such as Aceras, Coe/oglossum and Hammarbya, apportioning many former Orchis species to expanded concepts of Anacamptis and Neotinea, and combining 'Listera' into Neottia. Emphasis has now switched from species comparison to species delimitation, integrating morphometric approaches with population genetic techniques via simultaneous ordinations. Early results suggest that several distinct speciation mechanisms operate within the British and Irish orchid flora, and challenge the validity of several 'Schedule 8' species. No meaningful differences exist between British Dactylorhiza 'lapponica' and D. 'traunsteineri' , and neither represents the same allopolyploid speciation event as D. traunsteineri from the type locality in Austria. AIso, contrary to the recent Atlas of the British & Irish flora, D. majalis s.s. does not occur in the British Isles. By contrast, three habitat 'races' within Gymnadenia merit species status. Epipactis 'youngiana' is not reliably distinct from E. helleborine, whereas the autogamous E. leptochila and E. dunensis both warrant species status, alongside E. sancta recently described from Lindisfame. Controversial taxa are either widely recognised but lack biological cohesion (Emperor's New Clothes species), rarely if ever recognised but possess biological cohesion (Cinderella species, including Robinson Crusoe species recently diverged on islands such as Dactylorhiza ebudensis), or are migrating northward, presumably in response to climate change (Bleriot species, such as Serapias parviflora). Recent arrivaIs by origination or migration are partly negated by extirpation of longer established species, notably Spiranthes aestivalis and arguably Epipogium aphyllum. Present evidence suggests that the orchid flora of the British Isles (excluding the iogeographically French Channel Islands) currently consists of52 species in 20 genera; these taxa are herein reclassified in anticipation of the third edition of Stace's Flora." (source : auteur) Type de publication : article de livre Référence biblio : Bateman R., 2006 - How many orchid species are currently native to the British Isles ? In : Bailey J., Ellis G., Eds, 2006 - Current taxonomic research on the British & European Flora (Leicester, 13-14 September 2003). London : Botanical Society of the British Isles, 89-110. ID PMB : 6456 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=6456 Exemplaires(0)
Disponibilité aucun exemplaire Integrating restriction site-associated DNA sequencing (RAD-seq) with morphological cladistic analysis clarifies evolutionary relationships among major species groups of bee orchids / Richard M. Bateman in Annals of Botany, vol. 121, n°1 (Année 2018)
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Titre : Integrating restriction site-associated DNA sequencing (RAD-seq) with morphological cladistic analysis clarifies evolutionary relationships among major species groups of bee orchids Type de document : texte imprimé Auteurs : Richard M. Bateman, Auteur ; Gábor Sramkó, Auteur ; Ovidiu Paun, Auteur Année de publication : 2018 Article en page(s) : pp. 85-105 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Ophrys Mots-clés : biogéographie évolution morphologie phylogénétique systématique pseudo-copulation séquençage génétique Résumé : "Bee orchids (Ophrys) have become the most popular model system for studying reproduction via insect-mediated pseudo-copulation and for exploring the consequent, putatively adaptive, evolutionary radiations. However, despite intensive past research, both the phylogenetic structure and species diversity within the genus remain highly contentious. Here, we integrate next-generation sequencing and morphological cladistic techniques to clarify the phylogeny of the genus.
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The comparatively high level of morphological homoplasy reflects extensive convergence, whereas the derived placement of the fusca group is attributed to paedomorphic simplification. The phenotype of the most recent common ancestor of the extant lineages is inferred, but it post-dates the majority of the character-state changes that typify the genus. RAD-seq may represent the high-water mark of the contribution of molecular phylogenetics to understanding evolution within Ophrys; further progress will require large-scale population-level studies that integrate phenotypic and genotypic data in a cogent conceptual framework." (source : auteurs)Type de publication : périodique Référence biblio : Bateman R., Sramkó G., Paun O., 2018 - Integrating restriction site-associated DNA sequencing (RAD-seq) with morphological cladistic analysis clarifies evolutionary relationships among major species groups of bee orchids. Annals of Botany, 121 (1) : 85-105. En ligne : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5786241/pdf/mcx129.pdf Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=67821
in Annals of Botany > vol. 121, n°1 (Année 2018) . - pp. 85-105[article]Exemplaires(0)
Disponibilité aucun exemplaire Morphometric comparison of British Pseudorchis albida with Icelandic P. straminea (Orchidaceae: Orchidinae) / Richard M. Bateman in New Journal of botany, vol. 7, n°2-3 (Année 2017)
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Titre : Morphometric comparison of British Pseudorchis albida with Icelandic P. straminea (Orchidaceae: Orchidinae) Type de document : texte imprimé Auteurs : Richard M. Bateman, Auteur ; Paula J. Rudall, Auteur ; I. Denholm, Auteur Année de publication : 2018 Article en page(s) : pp. 78-93 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Pseudorchis
[Espèces (in biblio)] Pseudorchis albida
[ZG] Royaume-Uni et Irlande
[Thèmes] TaxonomieMots-clés : conservation morphométrie spéciation aire de répartition Résumé : "Although the majority of taxonomic studies of European orchids treat Pseudorchis as a monotypic genus, some observers have argued that the apparently circumboreal segregate P. straminea should also be treated as a full species. Here, we compare detailed in vivo measurements of 55 plants from nine populations of P. albida in Britain with ten plants from three populations of P. straminea in Iceland, We apply morphometric statistics to data for 31 morphometric characters, culled from an original set of 36. We also review current (limited) DNA-based evidence of their evolutionary divergence. Of the 31 variable morphometric characters, 14 help to distinguish the two species, including labellum dimensions, spur length, flower colour, bract and leaf lengths, leaf colour and apical hooding. Molecular divergence (notably in ITS) approximates the lowest level needed for acceptance of species-level distinction, but thus far, the molecular information is typological and does not encompass seemingly intermediate populations of ‘P. tricuspis’ occurring in the mountains of central Europe. Pseudorchis has the potential to become a valuable model system for the study of speciation and subsequent inter-/post-glacial migration. Despite persistent rumours, we found no evidence that P. straminea (or ‘P. tricuspis’) occurs in the British Isles; nonetheless, this species should continue to be sought in suitable habitats in northern Scotland. Morphological variation within P. albida is comparatively low, though the most exposed of our study populations exhibits (presumably ecophenotypic) dwarfing." (source : auteurs) Type de publication : périodique Référence biblio : Bateman R., Rudall P., Denholm I., 2018 - Morphometric comparison of British Pseudorchis albida with Icelandic P. straminea (Orchidaceae: Orchidinae). New Journal of botany, 7 : 78-93. ID PMB : 66863 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66863
in New Journal of botany > vol. 7, n°2-3 (Année 2017) . - pp. 78-93[article]Exemplaires(1)
Cote Localisation Disponibilité P0130-5 Brest Exclu du prêt Taxonomic complexity, conservation and recurrent origins of self-pollination in Epipactis (Orchidaceae) / Peter M. Hollingsworth
in Current taxonomic research on the British & European Flora (Leicester, 13-14 September 2003) / John Bailey (2006)
Titre : Taxonomic complexity, conservation and recurrent origins of self-pollination in Epipactis (Orchidaceae) Type de document : texte imprimé Auteurs : Peter M. Hollingsworth, Auteur ; J. Squirrell, Auteur ; M.L. Hollingsworth, Auteur ; A. J. Richards, Auteur ; Richard M. Bateman, Auteur Importance : pp. 27-44 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Epipactis
[Thèmes] TaxonomieMots-clés : cpSSRs plante endémique marqueur génétique RFLPs Résumé : "The recent post-glacial colonisation of Britain has given little time for the evolution of endemic plant species. The few British endemic species that have been recognised tend to occur in taxonomically complex groups that possess mechanisms promoting rapid diversi-fication. Such taxonomie complexity leads to problems for plant conservation because a species has to be circumscribed and recognised before its distribution, status and threats can be established. One classic example of the challenges for conservation in taxonomie ally complex groups is the British endemic orchid Epipactis youngiana. This species is afforded full legal conservation protection but is one of a large number of taxonomically difficult species recently recognised in the genus; it is difficult to distinguish from the more common E. helleborine, and its species status has been questioned. We have used a combination of genetic markers (allozymes, chloroplast microsatellites and RFLPs) from a large sample set to establish the taxonomie and conservation status of E. youngiana and to place it in the wider context of patterns of breeding system variation and taxon differentiation in the genus. Our data provide evidence that recurrent breeding system transitions between cross-pollination and self-pollination are an important mechanism for diversification in the genus, and there are numerous genetically different taxa that are homozygous and uniform for different subsets of allelic diversity found in allogamous species.
E. youngiana is the one major exception to this pattern. It has a floral morphology consistent with self-pollination, but has not achieved reproductive isolation from E. helleborine. The potential mechanisms underlying the recurrent evolution of self-pollination in Epipactis are discussed, as is the need for developing conservation strategies that reflect dynamic diversification in the genus, rather than the current heavily typological (is it distinct or not?) species-based approach." (source : auteurs)Type de publication : article de livre Référence biblio : Hollingsworth P.-M., Squirrell J., Hollingsworth M.-L., Richards A.-J., Bateman R., 2006 - Taxonomic complexity, conservation and recurrent origins of self-pollination in Epipactis (Orchidaceae). In : Bailey J., Ellis G., Eds, 2006 - Current taxonomic research on the British & European Flora (Leicester, 13-14 September 2003). London : Botanical Society of the British Isles, 27-44. ID PMB : 6459 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=6459 Exemplaires(0)
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