Karyomorphological study of five Turkish endemic<i>Rhaponticoides</i>Vaill. (Asteraceae, Cardueae) species

Uysal, Tuna; Sezer, Ela Nur Şimşek; Bozkurt, Meryem; Tuğay, Osman; Ertuğrul, Kuddisi; Demirelma, Hakkı; Dural, Hüseyin

doi:10.1080/00087114.2016.1169088

Cited by 3 publications

(3 citation statements)

References 48 publications

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“…Our A1 and A2 values were lower than those of previous reports on Rhaponticoides and Centaurea taxa (Uysal et al, 2015(Uysal et al, , 2016; therefore, the genus includes more symmetric karyotypes and fewer derived species.…”

Section: Discussioncontrasting

confidence: 93%

Karyomorphological features of Turkish Centaurea (subgenus Cyanus, Asteraceae) species and its taxonomic importance

Şirin¹,

Bozkurt²,

Uysal³

et al. 2019

Turk J Bot

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Introduction Cytotaxonomy is a branch of cytogenetics in which karyological features are systematically evaluated for evolutionary purposes (Siljak-Yakovlev and Peruzzi, 2012). Chromosomes, especially plant chromosomes, are useful materials in nearly any type of cytogenetic research (Guerra, 2012). Because the genetic information of an organism is transmitted through its chromosomes, any changes in numbers (e.g., polyploid or diploid) and structures (e.g., inversion, deletion, or translocation) contribute significantly to plant evolution and speciation; however, to interpret the evolutionary history of a group, the number of chromosomes alone is not enough (Weiss-Schneeweiss and Schneeweiss, 2003) and karyomorphology might supply additional information. In some cases, ecological and morphological data might not be sufficient for analyzing the line of descent among the species. In these situations, cytotaxonomic relationships along with molecular data might be more influential in the analyses (Venora et al., 2008). The karyotype reveals phenotypic appearance in terms of number, size, arm ratio, centromere position, and other basic characteristics of chromosomes (Levin, 2002). Centaurea, which belongs to the tribe Cardueae, is a large genus with approximately 250 species (Susanna and Garcia-Jacas, 2007) and the highest rate of endemism, with 112 endemics among the total 181 species in Turkey (Uysal, 2012). Cyanus, a subgenus, is represented by approximately 25 species worldwide (Hellwig, 2004). According to recent definitions of Centaurea (Susanna and Garcia-Jacas, 2007), the following 3 subgenera are included: Acrocentron, Centaurea, and Cyanus. Sister relationships of Cyanus and Centaurea are firmly established, but the connections between these subgenera and Acrocentron are unclear (Susanna and Garcia-Jacas, 2009). Based on current molecular studies, for the aims of our research, Cyanus is considered a subgenus. Taxonomically, Cyanus was first described as a genus by Miller (1754). The group was subsequently reassigned as a section of Centaurea by de Candolle (1838) and this was widely accepted by taxonomists (Bentham, 1873; Boissier, 1875; Wagenitz, 1975). It is now generally accepted that Cyanus is a subgenus (Hilpold et al., 2014) or, rarely, a group (Wagenitz and Hellwig, 1996; Garcia-Jacas et al., 2001) within Centaurea; however, some authors still assert that it is a genus (Greuter, 2003; Bancheva and Greilhuber, 2006). The Cyanus group is distributed across central and southern Europe, North Africa, Anatolia, and the Caucasus, and some species have spread to Iran and Afghanistan (Boršić et al., 2011). The floret colors are blue or purplish blue in this group, with a few exceptions of taxa that are cream or Research Article This work is licensed under a Creative Commons Attribution 4.0 International License.

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Section: Discussioncontrasting

confidence: 93%

Karyomorphological features of Turkish Centaurea (subgenus Cyanus, Asteraceae) species and its taxonomic importance

Şirin¹,

Bozkurt²,

Uysal³

et al. 2019

Turk J Bot

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“…Despite its biogeographic interest 42 , we lack a time-calibrated biogeographical study to shed light on the processes underlying the current distribution of the genus and reveal its ancestral area as well as its migration routes and speciation events across the Mediterranean basin. Similarly, a comprehensive phylogenetic study based on molecular data of the genus might support or refute the latest taxonomical proposal 41 as well as previous morphological, palynological, and karyological studies 39,40,[43][44][45][46] .…”

mentioning

confidence: 72%

“…As for the south route (route 2 in Fig. 4 ), the Mediterranean line integrates a series of species of narrow distribution, many of them from the Mediterranean part of Anatolia 41 , 46 extending westwards to North Africa and the Iberian Peninsula (Fig. 4 ).…”

Section: Discussionmentioning

confidence: 99%

Biogeography of Rhaponticoides, an Irano-Turanian element in the Mediterranean flora

Bozkurt

Alarcón

Uysal

et al. 2022

Sci Rep

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Floristic relationships between the Irano-Turanian and Mediterranean regions have been known from old. However, only a few biogeographical analyses based on molecular data have evaluated the history of steppe plants within the Mediterranean basin. Our study aims to contribute to a better understanding of the migratory and diversification processes by reconstructing the biogeography of Rhaponticoides (Cardueae), distributed in the Mediterranean and Irano-Turanian regions. We generated nuclear and plastid sequences that were analyzed by Bayesian inference. We used the resulting phylogeny for dating the diversification of the genus and examining the dispersal pathways. Two clades were recovered, an Irano-Turanian clade and a Mediterranean clade. The origin of the genus was placed in the Anatolian plateau in the Middle Miocene. The genus experienced several diversifications and expansions correlated to the Messinian salinity crisis and the environmental changes in the Pliocene and the Quaternary. Rhaponticoides migrated following two routes reflecting the two souls of the genus: Irano-Turanian taxa colonized the steppes of Eurasia whilst Mediterranean species migrated via eastern and central Mediterranean and North Africa, leaving a trail of species; both pathways ended in the Iberian Peninsula. Our study also confirms that more work is needed to unravel phylogenetic relationships in Rhaponticoides.

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Cytogenetic variations in eight species of Saussurea DC. (Asteraceae, Cardueae) from Northwest Himalaya

Singh

Gupta

Malik

et al. 2017

Plant Biosystems - An International Journal Dealing with all As

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Karyomorphological study of five Turkish endemicRhaponticoidesVaill. (Asteraceae, Cardueae) species

Cited by 3 publications

References 48 publications

Karyomorphological features of Turkish Centaurea (subgenus Cyanus, Asteraceae) species and its taxonomic importance

Karyomorphological features of Turkish Centaurea (subgenus Cyanus, Asteraceae) species and its taxonomic importance

Biogeography of Rhaponticoides, an Irano-Turanian element in the Mediterranean flora

Cytogenetic variations in eight species of Saussurea DC. (Asteraceae, Cardueae) from Northwest Himalaya

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