Polyploidy and hybridization in the Mediterranean: unravelling the evolutionary history of Centaurium (Gentianaceae).

Background And Aims: Polyploidy is considered one of the main mechanisms of plant evolution and speciation. In the Mediterranean Basin, polyploidy has contributed to making this region a biodiversity hotspot, along with its geological and climatic history and other ecological and biogeographical factors. The Mediterranean genus Centaurium (Gentianaceae) comprises ~25 species, of which 60 % are polyploids, including tetraploids and hexaploids.

Genetic Diversity and Population Structure Assessed Using Microsatellite (SSR) Markers from Relict Populations of (Nymphaeaceae).

The genus (Nymphaeaceae) comprises aquatic plant species inhabiting freshwater bodies of the Northern hemisphere temperate regions known as yellow water-lilies. and are the only representatives in the European continent and present different ecologies: the former is a widespread generalist, while the latter is restricted to northern latitudes or high-altitudes due to its requirements for colder and oligotrophic waters. The Central Europe mountainous areas, the Massif Central (France) and the Cantabrian Mountains (north Iberian Peninsula) harbor relict isolated populations endangered by eutrophication and hybridization with .

What Hides in the Heights? The Case of the Iberian Endemism .

is a recently described species belonging to a complex genus of grasses. It inhabits stony soils at heights ranging from 1600 to 2200 m in Picos de Europa (Cantabrian Mountains, northern Spain). This species is morphologically very similar to , partially sharing its presumed distribution range.

Relevance of DNA preservation for future botany and ecology.

The use of molecular methods in plant systematics and taxonomy has increased during the last decades; however, the accessibility of curated genetic samples and their metadata is a bottleneck for DNA-based genetic studies in botany. Plant biodiversity DNA banks and DNA-friendly collections could be critical suppliers of curated genetic material for researchers in the current context of plant biodiversity loss. Here, we aimed to understand the potential of plant DNA banks and DNA-friendly collections to enhance the growth and openness of scientific knowledge.

Polyphyletic origin in Pimpinella (Apiaceae): evidence in Western Europe.

The genus Pimpinella L. comprises about 150 species, being one of the largest genera within the family Apiaceae (subfamily Apioideae). Previous molecular phylogenetic studies have shown that Pimpinella is a taxonomically complex group.

Phylogenetic relationships of Petrocoptis A. Braun ex Endl. (Caryophyllaceae), a discussed genus from the Iberian Peninsula.

Petrocoptis is a small genus of chasmophytic plants endemic to the Iberian Peninsula, with some localized populations in the French Pyrenees. Within the genus, a dozen species have been recognized based on morphological diversity, most of them with limited distribution area, in small populations and frequently with potential threats to their survival. To date, however, a molecular evaluation of the current systematic treatments has not been carried out.

Phylogeny and systematics of Micranthes (Saxifragaceae): an appraisal in European territories.

Recent phylogenetic studies have shown that Saxifraga, as currently understood, must be divided into two genera: Saxifraga L. sensu stricto and Micranthes Haw. To better understand the evolutionary history of these two genera, we performed phylogenetic analyses inferred from the nuclear ribosomal sequences from the internal transcribed spacer and the sequences of the plastid DNA (rbcL).