Nadja Korotkova

Freie Universität Berlin | FUB · Botanischer Garten und Botanisches Museum

A taxonomic backbone of the Plumbaginaceae is presented and the current state of knowledge on phylogenetic relationships and taxon limits is reviewed as a basis for the accepted taxon concepts. In total, 4,476 scientific names and designations are treated of which 30 are not in the family Plumbaginaceae. The Plumbaginaceae are subdivided in three t...

The access to molecular collections worldwide greatly improves the quality of scientific research by making a growing number of data available for investigation. The efforts on digitisation also aim at facilitating the exchange of material between institutions and researchers that must follow regulations in place and respect best practice. The hand...

The access to molecular collections worldwide greatly improves the quality of scientific research by making a growing number of data available for investigation. The efforts on digitization also aim at facilitating the exchange of material between institutions and researchers that must follow regulations in place and respect best practice. The hand...

The Caryophyllales TEN is one of the Taxonomic Expert Networks for the World Flora Online (WFO, worldfloraonline.org). It was initiated in 2011 with the aim to create a global taxonomic synthesys of the angiosperm order Caryophyllales (about 6% of the angiosperm species). The network currently includes about 170 scientists from 36 countries. The fi...

In this study, we present an overall phylogenetic framework for Dianthus using four plastid regions (matK-trnK-psbA, rpl32-trnL, trnQ-rps16) and nuclear ITS and a species-level checklist for the genus developed by using all available databases and the literature. The trees from the plastid dataset depict a clade of Dianthus that also includes Velez...

In this study, we present an overall phylogenetic framework for Dianthus using four plastid regions (matK-trnK-psbA, rpl32-trnL, trnQ-rps16) and nuclear ITS and a species-level checklist for the genus developed by using all available databases and the literature. The trees from the plastid dataset depict a clade of Dianthus that also includes Velez...

This data paper presents a largely phylogeny-based online taxonomic backbone for the Cactaceae compiled from literature and online sources using the tools of the EDIT Platform for Cybertaxonomy. The data will form a contribution of the Caryophyllales Network for the World Flora Online and serve as the base for further integration of research result...

Rhipsalis rhombea is common in living collections, but the name has been used ambiguously in recent decades and has never been typified. We review the taxonomic history of this species and conclude that the name can be applied unambiguously. We therefore establish a neotype for Rhipsalis rhombea Pfeiff. and give a detailed morphological characteriz...

This is the twelfth of a series of miscellaneous contributions, by various authors, where hitherto unpublished data relevant to both the Med-Checklist and the Euro+Med (or Sisyphus) projects are presented. This instalment deals with the families Asparagaceae (incl. Hyacinthaceae), Boraginaceae, Cactaceae, Caryophyllaceae, Chenopodiaceae, Compositae...

The Hylocereeae is a monophyletic group in which eight genera are recognized based on molecular data. However, relationships between the genera remain partially resolved. In this study, combined analyses of molecular and structural characters for Hylocereeae were carried out with the aims of fnding structural synapomorphies that support the genera...

Campanula is one of the species-rich genera of the bellflower family (Campanulaceae), in a wider sense with ∼600 species, growing in a wide range of habitats in the northern hemisphere. The Caucasus is one of the areas with especially many endemic Campanula species. The Scapiflorae group comprises alpine and subalpine perennial rocky plants, which...

The ongoing paradigm shift in taxonomy from individual contributions to a truly collaborative and forward-looking endeavour results in a number of challenges related to distributed data management. Examination of physical specimens remains a key task, but searching for specimen data, literature, and name information is now mostly done online. In th...

Jurinea (Asteraceae: Cardueae) is a large Eurasian genus of about 180 species with centres of diversity in Central and Southwest Asia and the eastern Mediterranean. The genus includes many species with adaptations to xero‐ and chasmophytic habitats and comprises numerous endemics, especially in the Caucasus. Generic delimitations between Jurinea an...

The Caryophyllales Network strives to assemble an online dynamic synthesis of the order Caryophyllales, uniting the current knowledge about the phylogeny of the order with up-to-date information on the individual taxa contained. Capturing taxonomic data and the decision processes involved in the definition and circumscription of the taxa requires h...

With approximately 25 endemic species, the genus Pyrus (pears) is highly diverse in the Caucasus ecoregion. The majority of Caucasian pears inhabit xerophytic open woodlands or similar habitats, to which they display morphological adaptations, such as narrow leaves. The other species, both Caucasian and non-Caucasian taxa, mainly inhabit mesophytic...

The tribe Hylocereeae are represented by mainly Central American-Mexican epiphytic, hemi-epiphytic and climbing cacti. They are popular due to their spectacular nocturnal flowers and have some importance as crops grown for their edible fruits. We present the first comprehensive phylogenetic study of the Hylocereeae sampling 60 out of the 63 current...

Euro+Med: Cactaceae. - Published on the internet at (please copy and paste the URL into your browser window): http://ww2.bgbm.org/EuroPlusMed/PTaxonDetail.asp?NameId=94373&PTRefFk=7500000

Campanula s.l. is one of the most speciose flowering plant lineages of the Holarctic (ca. 600 species). In the present study we sequenced three regions of the plastid genome (petD, rpl16 and trnK/matK) across a broad sample of Campanula s.l., which markedly improved phylogenetic resolution and statistical support compared to previous studies. Based...

The Caryophyllales constitute a major lineage of flowering plants with approximately 12500 species in 39 families. A taxonomic backbone at the genus level is provided that reflects the current state of knowledge and accepts 749 genera for the order. A detailed review of the literature of the past two decades shows that enormous progress has been ma...

The Cactaceae with c. 1,435 species are the most important plant family of the arid regions of the Americas. Recent revisions and molecular studies resulted in an improved knowledge of the phylogeny and taxonomy of this group. Due to their high value as ornamental plants, countless publications with data on ecological preferences and geographic occ...

Plastid genomes exhibit different levels of variability in their sequences, depending on the respective kinds of genomic regions. Genes are usually more conserved while noncoding introns and spacers evolve at a faster pace. While a set of about thirty maximum variable noncoding genomic regions has been suggested to provide universally promising phy...

Premise of the study: The current study aimed at developing nuclear microsatellite markers for the relict tree species Zelkova carpinifolia , which is threatened in its natural range in the South Caucasus. Methods and Results: Pyrosequencing of an enriched microsatellite library on the Roche FLX platform using the 454 Titanium kit produced 86,058 s...

The Orchidaceae with some 22 000 species is one of the two largest plant families. Despite of the vast literature on orchids, rather little is known about their seeds, which are generally considered as wind dispersed, small and reduced “dust seeds”. Based on some 1400 collections of orchid seeds analysed by SEM and other methods over the last four...

Amborella trichopoda Baill., the most ancestral angiosperm, has been successfully cultivated in the Botanic Gardens of the University of Bonn in Germany (BG Bonn) for more than a decade. The distribution of this plant – limited to the South Pacific island of New Caledonia – and its cultivation has so far only been achieved in a few botanic gardens....

• The Cactaceae are a major New World plant family and popular in horticulture. Still, taxonomic units and species limits have been difficult to define, and molecular phylogenetic studies so far have yielded largely unresolved trees, so relationships within Cactaceae remain insufficiently understood. This study focuses on the predominantly epiphyti...

Pfeiffera is a genus of epiphytic, terrestrial and epilithic cacti. Its acceptance, circumscription and closest relatives have been debated. In the context of a phylogenetic survey of epiphytic cacti, we have studied relationships in Pfeiffera, sampling eight of nine species and using sequence data from three group II introns (trnK, rpl16, trnG) ,...

For more up to date information regarding our Cactus distribution dataset please compare: https://www.researchgate.net/publication/270476747_Biogeography_and_Biodiversity_of_Cacti

The Titan arum (Araceae) produces the largest bloom of all flowering plants. Its flowering period of two days is divided into a female flowering phase in the first night and a male flowering phase in the second night. Recently, we have documented thermogenesis in the spadix of the Titan arum during the female flowering phase. Here, we document a se...

Malpighiales are one of the most diverse orders of angiosperms. Molecular phylogenetic studies based on combined sequences of coding genes allowed to identify major lineages but hitherto were unable to resolve relationships among most families. Spacers and introns of the chloroplast genome have recently been shown to provide strong signal for infer...

An outstanding flagship species in the plant kingdom is the Titan arum (Amorphophallus titanum), which produces a fountain-like bloom up to 3 m high. The unique appearance of three simultaneous inflorescences in May 2006 was a chance to analyse the flowering behaviour and thermogenesis of this giant. For the first time, the heating of the central c...

Chloroplast introns have a high potential as tools for phylogeny inference and DNA barcoding. This study examines the molecular evolution of the petD group II intron in Campanulaceae based on a sequence data set of 114 ingroup taxa. Three small mutational hotspots had to be excluded from phylogenetic analysis, the two most variable being located in...