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Auteur Karol Marhold |
Documents disponibles écrits par cet auteur (5)
Affiner la rechercheCardamine occulta, the correct species name for invasive Asian plants previously classified as C. flexuosa, and its occurrence in Europe / Karol Marhold in PhytoKeys, 62 (2016)
Titre : Cardamine occulta, the correct species name for invasive Asian plants previously classified as C. flexuosa, and its occurrence in Europe Type de document : Électronique Auteurs : Karol Marhold ; Marek Šlenker ; Hiroshi Kudoh ; Judita Zazomová Année de publication : 2016 Article en page(s) : 57-72 Langues : Français (fre) Catégories : [Géographique] Europe
[Thématique] Plantes subspontanées, naturalisées, envahissantesMots-clés : Cardamine occulta Hornem., 1819 Cardamine flexuosa With., 1796 Cardamine flexuosa subsp. debilis Cardamine hamiltonii Résumé : The nomenclature of Eastern Asian populations traditionally assigned to Cardamine flexuosa has remained unresolved since 2006, when they were found to be distinct from the European species C. flexuosa. Apart from the informal designation “Asian C. flexuosa”, this taxon has also been reported under the names C. flexuosa subsp. debilis or C. hamiltonii. Here we determine its correct species name to be C. occulta and present a nomenclatural survey of all relevant species names. A lectotype and epitype for C. occulta and a neotype for the illegitimate name C. debilis (replaced by C. flexuosa subsp. debilis and C. hamiltonii) are designated here. Cardamine occulta is a polyploid weed that most likely originated in Eastern Asia, but it has also been introduced to other continents, including Europe. Here data is presented on the first records of this invasive species in European countries. The first known record for Europe was made in Spain in 1993, and since then its occurrence has been reported from a number of European countries and regions as growing in irrigated anthropogenic habitats, such as paddy fields or flower beds, and exceptionally also in natural communities such as lake shores. Identifiant pérenne : DOI : 10.3897/phytokeys.62.7865
in PhytoKeys > 62 (2016) . - 57-72Marhold, K., Šlenker, M., Kudoh, H., Zazomová, J., 2016 - Cardamine occulta, the correct species name for invasive Asian plants previously classified as C. flexuosa, and its occurrence in Europe ; PhytoKeys, 62 : 57-72.Documents numériques
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Titre : Comparative ITS and AFLP analysis of diploid cardamine (brassicaceae) taxa from closely related polyploid complexes Type de document : Imprimé Auteurs : Karol Marhold ; Judita Lihová ; Marián Perny ; Walter Bleeker Année de publication : 2004 Article en page(s) : 507-520 Langues : Anglais (eng) Catégories : [Thématique] Phylogénie (liens existant entre espèces apparentées) Mots-clés : Cardamine pratensis L. Cardamine raphanifolia Cardamine amara L. Résumé : Background and aims: Diploid representatives from the related polyploid complexes of Cardamine amara, C. pratensis and C. raphanifolia (Brassicaceae), were studied to elucidate phylogenetic relationships among the complexes and among the individual taxa included. Methods: Two independent molecular data sets were used: nucleotide sequences from the internal transcribed spacers (ITS) of nrDNA, and amplified fragment length polymorphism (AFLP) markers. Seventeen diploid taxa from the studied groups were sampled. Key results: Both ITS and AFLP analyses provided congruent results in inferred relationships, and revealed two main lineages. While the C. amara group, consisting of C. wiedemanniana and four subspecies of C. amara, was resolved as a well-supported monophyletic group, taxa from the C. pratensis and C. tenera groups (the latter representing diploid taxa of the complex of C. raphanifolia) all appeared together in a single clade/cluster with no support for the recognition of either of the groups. Intra-individual polymorphisms and patterns of nucleotide variation in the ITS region in C. uliginosa and C. tenera, together with the distribution of AFLP bands, indicate ancient hybridization and introgression among these Caucasian diploids. Conclusions: The lack of supported hierarchical structure suggests that extensive reticulate evolution between these groups, even at the diploid level, has occurred (although an alternative explanation, namely ancestral polymorphism in ITS data, cannot be completely excluded). Several implications for the investigation of the polyploid complexes of concern are drawn. When tracing origins of polyploid taxa, a much more complex scenario should be expected, taking into account all relatives as potential parents, irrespective of the group in which they are classified. Identifiant pérenne : DOI : 10.1093/aob/mch073
in Annals of Botany > 93 (2004) . - 507-520Marhold, K., Lihová, J., Perny, M., Bleeker, W., 2004 - Comparative ITS and AFLP analysis of diploid cardamine (brassicaceae) taxa from closely related polyploid complexes ; Annals of Botany, 93 : 507-520.Documents numériques
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Titre : Natural hybridization in Cardamine (Brassicaceae) in the Pyrenees: evidence from morphological and molecular data Type de document : Imprimé Auteurs : Karol Marhold ; Judita Lihová ; Marián Perny ; Rudi Grupe Année de publication : 2002 Article en page(s) : 275-294 Langues : Français (fre) Catégories : [Thématique] Génétique et écologie (dynamique, démographique, sélection) Mots-clés : Cardamine Résumé : While researching Cardamine (Brassicaceae) in the Pyrenees, putative hybrid plants were found at two natural sites. Pollen grain viability, AFLP, and multivariate morphometric analyses were performed in order to assess the plants' presumed hybrid origin, establishing that natural hybridization between the diploids C. crassifolia and C. amara ssp. pyrenaea had occurred. A new diploid nothospecies, C.×enriquei (2n = 2x = 16), is described. Examination of 18 morphological characters showed the intermediacy of the hybrid between the parental taxa in most characters. AFLP analyses of C. amara ssp. amara, ssp. austriaca, ssp. olotensis and C. raphanifolia, demonstrated the close position of the hybrid to C. crassifolia, and revealed that the highest number of markers were shared with the parents. Polymorphism found in the AFLP pattern of the hybrid suggested recurrent origin, segregation and/or backcrosses, although assessment of pollen viability indicated high male sterility. The hybridization event reported here represents the second documented case between the C. pratensis group and C. amara. An account of the nomenclature of C. crassifolia is also presented, including lectotypification of relevant names. Identifiant pérenne : DOI : 10.1046/j.1095-8339.2002.00066.x
in Botanical Journal of the Linnean Society > 139 (2002) . - 275-294Marhold, K., Lihová, J., Perny, M., Grupe, R., 2002 - Natural hybridization in Cardamine (Brassicaceae) in the Pyrenees: evidence from morphological and molecular data ; Botanical Journal of the Linnean Society, 139 : 275-294.Documents numériques
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Titre : Origin of the disjunct tetraploid Cardamine amporitana (Brassicaceae) assessed with nuclear and chloroplast DNA sequence data Type de document : Imprimé Auteurs : Judita Lihová ; Javier Fuertes Aguilar (1960-) ; Karol Marhold ; Gonzalo Nieto Feliner Année de publication : 2004 Article en page(s) : 1231-1242 Langues : Anglais (eng) Mots-clés : Cardamine amporitana Résumé : Seventy-four nucleotide sequences from the ITS regions of nuclear ribosomal DNA and 76 from the trnL-trnF spacer of chloroplast DNA were used to address the origin of tetraploid Cardamine amporitana, the conspecifity of central Italian and northeastern Spanish populations, and the possible cause for such geographic disjunction. Because of the complex lineage relationships in Cardamine, the sampling included 22 taxa. In the results, both data sets are highly congruent in supporting a close relationship of C. amporitana to the widespread Eurasian C. amara. Low genetic variability in northeastern Spanish populations of C. amporitana suggests long-distance dispersal from central Italy. The interior position of the single northeastern Spanish haplotype in a statistical parsimony network of trnL-trnF haplotypes however does not support this scenario and invokes other plausible phylogeographic explanations. The disappearance of geographically intermediate populations and genetic impoverishment by migration and isolation, both probably associated with Quaternary climatic oscillations, appears as an alternative hypothesis to explain the phylogeographic pattern. A recent hybridization event is reported between C. amporitana and a diploid from the C. pratensis group in central Italy on the basis of additive polymorphisms in ITS for all the 22 distinguishing nucleotides. Identifiant pérenne : DOI : 10.3732/ajb.91.8.1231
in American Journal of Botany > 91 (8) (2004) . - 1231-1242Lihová, J., Fuertes Aguilar, J., Marhold, K., Nieto Feliner, G., 2004 - Origin of the disjunct tetraploid Cardamine amporitana (Brassicaceae) assessed with nuclear and chloroplast DNA sequence data ; American Journal of Botany, 91 (8) : 1231-1242.Documents numériques
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Titre : Unravelling allopolyploid origins in the Alyssum montanum–A. repens species complex (Brassicaceae) : low-copy nuclear gene data complement plastid DNA sequences and AFLPs Type de document : Électronique Auteurs : Andrea Melicharkova ; Stanislav Spaniel ; Daniela Briskova ; Karol Marhold ; Judita Lihová Année de publication : 2017 Article en page(s) : 485–502 Langues : Anglais (eng) Mots-clés : Alyssum montanum L., 1753 Résumé : Reconstructing polyploid origins and reticulate evolution is challenging even if several independent markers are employed. The Alyssum montanum–A. repens group is a species complex comprising multiple polyploids with as yet insufficiently investigated origins. Here we search for the parentage of two related polyploids, A. montanum (s.s.) and A. rhodanense, using sequences of two low-copy nuclear genes and show how these data can complement and strengthen evidence based on plastid DNA and AFLPs. Whereas A. montanum, even in its strict circumscription, represents a complex of diploid and tetraploid lineages distributed from south-western Germany and western Switzerland to the foothills of the Pyrenees, A. rhodanense is a hexaploid stenoendemic from south-eastern France. In both polyploids, we revealed divergent gene copies (homoeologues) that point to their allopolyploid origins and allow the identification of their parental species. The results suggest that tetraploids of A. montanum originated from hybridization between diploids of this species and the Iberian A. fastigiatum and that multiple allopolyploidization events took place. For A. rhodanense, we propose an allopolyploid origin involving A. gmelinii and tetraploids of A. montanum. We illustrate how combined evidence from several markers contributes to more comprehensive and confident inferences about polyploid origins. Identifiant pérenne : DOI : 10.1093/botlinnean/box039
in Botanical Journal of the Linnean Society > 184 (2017) . - 485–502Melicharkova, A., Spaniel, S., Briskova, D., Marhold, K., Lihová, J., 2017 - Unravelling allopolyploid origins in the Alyssum montanum–A. repens species complex (Brassicaceae) : low-copy nuclear gene data complement plastid DNA sequences and AFLPs ; Botanical Journal of the Linnean Society, 184 : 485–502.Documents numériques
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