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    Centaurea glabro-auriculata (Asteraceae), a new species from Turkey
    (FINNISH ZOOLOGICAL BOTANICAL PUBLISHING BOARD, 2007) Uysal, Tuna; Demirelma, Hakki; Ertugrul, Kuddisi; Garcia-Jacas, Nuria; Susanna, Alfonso
    Centaurea glabro-auriculata Uysal & Demirelma sp. nova (Asteraceae) is described and illustrated from Central Taurus, Turkey. The species grows in stony places in Derebucak (C3 Konya Province). It is morphologically most similar to C. drabifolioides and C. cheirolepidoides, which are likewise endemic to a restricted area within Turkey.
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    Lectotypification of the Linnaean name Centaurea montana (Compositae, Cardueae-Centaureinae)
    (MAGNOLIA PRESS, 2017) Altinordu, Fahim; Susanna, Alfonso
    A lectotype is designated for the Linnaean name Centaurea montana from the original material conserved in the Burser herbarium (UPS).
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    New chromosome counts in the genus Centaurea (Asteraceae) from Turkey
    (OXFORD UNIV PRESS, 2009) Uysal, Tuna; Ertugrul, Kuddisi; Susanna, Alfonso; Garcia-Jacas, Nuria
    Twenty-two chromosome counts are reported in 16 species, four subspecies and two varieties of the genus Centaurea. These are mostly Turkish local endemics of section Cheirolepis, a complicated group from the Eastern clade of the Jacea group. Twenty-one reports are new. Prevalence of the basic chromosome number x = 9 among the eastern sections of the Jacea group is confirmed. (C) 2009 The Linnean Society of London, Botanical Journal of the Linnean Society, 2009, 159, 280-286.
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    Phylogeny of the Centaurea group (Centaurea, Compositae) - Geography is a better predictor than morphology
    (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2014) Hilpold, Andreas; Vilatersana, Roser; Susanna, Alfonso; Meseguer, Andrea S.; Borsic, Igor; Constantinidis, Theophanis; Filigheddu, Rossella
    The Centaurea group is part of the Circum-Mediterranean Clade (CMC) of genus Centaurea subgenus Centaurea, a mainly Mediterranean plant group with more than 200 described species. The group is traditionally split on morphological basis into three sections: Centaurea, Phalolepis and Willkommia. This division, however, is doubtful, especially in light of molecular approaches. In this study we try to resolve this phylogenetic problem and to consolidate the circumscription and delimitation of the entire group against other closely related groups. We analyzed nuclear (internal transcribed spacer of the ribosomal genes) and chloroplast (rpl32-trnL intergenic spacer) DNA regions for most of the described species of the Centaurea group using phylogenetic and network approaches, and we checked the data for recombination. Phylogeny was used to reconstruct the evolution of the lacerate-membranaceous bract appendages using parsimony. The magnitude of incomplete lineage sorting was tested estimating the effective population sizes. Molecular dating was performed using a Bayesian approach, and the ancestral area reconstruction was conducted using the Dispersal-Extinction-Cladogenesis method. Monophyly of the Centaurea group is confirmed if a few species are removed. Our results do not support the traditional sectional division. There is a high incongruence between the two markers and between genetic data and morphology. However, there is a clear relation between geography and the structure of the molecular data. Diversification in the Centaurea group mainly took place during the Pliocene and Pleistocene. The ancestral area infered for the Circum-Mediterranean Clade of Centaurea is the Eastern Mediterranean, whereas for the Centaurea group it is most likely NW-Africa. The large incongruencies, which hamper phylogenetic reconstruction, are probably the result of introgression, even though the presence of incomplete lineage sorting as an additional factor cannot be ruled out. Convergent evolution of morphological traits may have led to incongruence between morphology-based, traditional systematics and molecular results. Our results also cast major doubts about current species delimitation. (C) 2014 Elsevier Inc. All rights reserved.
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    Speciation and genetic diversity in Centaurea subsect. Phalolepis in Anatolia
    (NATURE PUBLISHING GROUP, 2016) Lopez-Pujol, Jordi; Lopez-Vinyallonga, Sara; Susanna, Alfonso; Ertugrul, Kuddisi; Uysal, Tuna; Tugay, Osman; Guetat, Arbi
    Mountains of Anatolia are one of the main Mediterranean biodiversity hotspots and their richness in endemic species amounts for 30% of the flora. Two main factors may account for this high diversity: the complex orography and its role as refugia during past glaciations. We have investigated seven narrow endemics of Centaurea subsection Phalolepis from Anatolia by means of microsatellites and ecological niche modelling (ENM), in order to analyse genetic polymorphisms and getting insights into their speciation. Despite being narrow endemics, all the studied species show moderate to high SSR genetic diversity. Populations are genetically isolated, but exchange of genes probably occurred at glacial maxima (likely through the Anatolian mountain arches as suggested by the ENM). The lack of correlation between genetic clusters and (morpho) species is interpreted as a result of allopatric diversification on the basis of a shared gene pool. As suggested in a former study in Greece, post-glacial isolation in mountains would be the main driver of diversification in these plants; mountains of Anatolia would have acted as plant refugia, allowing the maintenance of high genetic diversity. Ancient gene flow between taxa that became sympatric during glaciations may also have contributed to the high levels of genetic diversity.