Centaurea Revisited: A Molecular Survey of the Jacea Group

Garcia‐Jacas, Núria; Uysal, Tuna; Romashchenko, Kostyantyn; Suárez‐Santiago, Víctor N.; Ertuğrul, Kuddisi; Susanna, Alfonso

doi:10.1093/aob/mcl157

Cited by 132 publications

(132 citation statements)

References 23 publications

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“…Centaurea solstitialis, C. calcitrapa, and C. sulphurea are three closely related species from the Jacea group in the Centaurea genus (Garcia‐Jacas et al., 2006). These species are related enough to hybridize when artificially crossed (Montesinos, Santiago, & Callaway, 2012).…”

Section: Methodsmentioning

confidence: 99%

“…Centaurea sulphurea was introduced into California by 1923 at the latest (Muth & Pigliucci, 2006), has a highly restricted native range in Spain and Morocco, and exists in only a handful of naturalized populations in California (Gerlach & Rice, 2003). However, in Spain the Californian invader C. solstitialis is less common than the noninvasive C. calcitrapa (Garcia‐Jacas et al., 2006). Centaurea sulphurea is uncommon in both ranges (http://www.gbif.org).…”

Section: Methodsmentioning

confidence: 99%

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Traits correlate with invasive success more than plasticity: A comparison of three Centaurea congeners

Montesinos

Callaway

2018

Ecology and Evolution

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The importance of phenotypic plasticity for successful invasion by exotic plant species has been well studied, but with contradictory and inconclusive results. However, many previous studies focused on comparisons of native and invasive species that co‐occur in a single invaded region, and thus on species with potentially very different evolutionary histories. We took a different approach by comparing three closely related Centaurea species: the highly invasive C. solstitialis, and the noninvasive but exotic C. calcitrapa and C. sulphurea. These species have overlapping distributions both in their native range of Spain and in their non‐native range of California. We collected seeds from 3 to 10 populations from each region and species and grew them in common garden greenhouse conditions to obtain an F1 generation in order to reduce maternal effects. Then, F1 seeds were grown subjected to simulated herbivory, variation in nutrient availability, and competition, to explore plasticity in the responses to these conditions. We found little variation in phenotypic plasticity among species and regions, but C. solstitialis plants from California produced more biomass in competition than their Spanish conspecifics. This species also had the highest relative growth rates when in competition and when grown under low nutrient availability. Noninvasive congeners produced intermediate or opposite patterns.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Traits correlate with invasive success more than plasticity: A comparison of three Centaurea congeners

Montesinos

Callaway

2018

Ecology and Evolution

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“…In addition, nine other species were added: C. cuneifolia Sm., a species morphologically similar to C. stoebe from the Balkans; three species from the C. paniculata group, namely C. aplolepa Moretti, C. leucophaea Jord., and C. paniculata L.; and three species showing similar ITS sequences based on a previous study (C. donetzica Klokov, C. sarandinakiae N.B. Illar., and C. vankovii Klokov; see Garcia-Jacas et al, 2006). All taxa belong to the sect.…”

Section: Plant Materials and Ploidy Level Determinationmentioning

confidence: 99%

Allopolyploid origin of highly invasive Centaurea stoebe s.l. (Asteraceae)

Mráz

Garcia‐Jacas

Gex-Fabry

et al. 2012

Molecular Phylogenetics and Evolution

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a b s t r a c tSpotted knapweed (Centaurea stoebe) occurs from Western Asia to Western Europe both as diploid and tetraploid cytotypes, predominantly in single-cytotype populations with higher frequency of diploid populations. Interestingly, only tetraploids have been recorded so far from its introduced range in North America where they became highly invasive.We performed phylogenetic and network analyses of more than 40 accessions of the C. stoebe and C. paniculata groups and other related taxa using cloned internal transcribed spacer (ITS) and sequences of the chloroplast trnT-trnL and atpBrbcL regions to (i) assess the evolutionary origin of tetraploid C. stoebe s.l., and (ii) uncover the phylogeny of the C. stoebe group. Both issues have not been studied so far and thus remained controversial.Cloned ITS sequences showed the presence of two slightly divergent ribotypes occurring in tetraploid cytotype, while only one major ribotype was present in diploid C. stoebe s.str. This pattern suggests an allopolyploid origin of tetraploids with contribution of the diploid C. stoebe s.str. genome. Although we were not able to detect the second parental taxon, we hypothesize that hybridization might have triggered important changes in morphology and life history traits, which in turn may explain the colonization success of the tetraploid taxon. Bayesian relaxed clock estimations indicate a relatively recent -Pleistocene origin of the tetraploid C. stoebe s.l. Furthermore, our analyses showed a deep split between the C. paniculata and C. stoebe groups, and a young diversification of the taxa within the C. stoebe group. In contrast to nrDNA analyses, the observed pattern based on two cpDNA regions was inconclusive with respect to the origin and phylogeny of the studied taxa, most likely due to shared ancient polymorphism and frequent homoplasies.

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“…According to Garcia-Jacas et al (2006), both putative parents belong to the Centaurea Jacea clade that stands as the core group of Centaurea. However, in a geographic classification system, they segregate into two different clades.…”

Section: Introductionmentioning

confidence: 99%

“…Centaurea moncktonii belongs to section Jacea, which is in the clade of widely distributed species. Centaurea solstitialis belongs to section Mesocentron among the Western Mediterranean group of species (Garcia-Jacas et al, 2006). Thus, despite sharing the important characters that define the Centaurea Jacea clade (pollen type Jacea and achene with a double pappus and lateral hilum), they are only distant relatives.…”

Section: Introductionmentioning

confidence: 99%

New habitats, new menaces: <i>Centaurea x kleinii (C. moncktonii x C. solstitialis)</i>, a new hybrid species between two alien weeds

Roché¹,

Susanna²

2010

Collect. Bot

Self Cite

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New habitats, new menaces: Centaurea x kleinii (C. moncktonii x C. solstitialis), a new hybrid species between two alien weeds.-Anthropic alteration of habitat opens the door to the cohabitation of imported species that in their native range would never coexist. Centaurea solstitialis and Centaurea moncktonii are two invasive species whose natural distributions in Eurasia do not overlap. After introduction in North America, invasive spread led to overlapping distributions. Although the environmental requirements differ between the two species, the close proximity of diverse habitats (within pollinator range) has resulted in several cases of natural hybridization between the two. The result of the cross between these two distantly related species is a sterile perennial. Many of its characteristics are intermediate between its parents, but morphologically it is closer to Centaurea moncktonii (probably the maternal parent, and itself of hybrid origin). The plant could possibly become an invasive weed through clonal reproduction. The apparent maternal parent, which the hybrid may more closely resemble physiologically as well as morphologically, is a wellknown creeping weed in alpine pastures throughout Europe.Key words: Centaurea moncktonii; Centaurea solstitialis; hybridization; invaders; Oregon. ResumenNuevos hábitats, nuevas amenazas: Centaurea x kleinii (C. moncktonii x C. solstitialis), nueva especie híbrida entre dos malas hierbas invasoras.-La alteración antrópica del hábitat da paso a la cohabitación de especies importadas que nunca coexistirían en su ámbito natural. Centaurea solstitialis y Centaurea moncktonii son dos especies invasoras cuyas distribuciones en Eurasia apenas se solapan. Después de su introducción en Norteamérica, la expansión invasiva condujo a distribuciones superpuestas. Aunque los requerimientos ambientales de las dos especies son distintos, la proximidad de hábitats diversos (dentro del alcance de los polinizadores) ha dado lugar a varios casos de hibridación natural entre ambas. El cruce resultante entre dos especies lejanamente emparentadas es una planta perenne estéril. Muchos de los caracteres del híbrido son intermedios entre sus especies parentales, pero morfológicamente es más parecida a Centaurea moncktonii (probablemente la especie materna y a su vez ya de origen híbrido). La nueva especie podría convertirse en una mala hierba invasora gracias a su reproducción vegetativa. La que suponemos especie materna, a la cual el híbrido se acerca morfológicamente y puede que fisiológicamente, es una mala hierba rastrera bien conocida de las praderas alpinas en toda Europa.

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Centaurea Revisited: A Molecular Survey of the Jacea Group

Cited by 132 publications

References 23 publications

Traits correlate with invasive success more than plasticity: A comparison of three Centaurea congeners

Traits correlate with invasive success more than plasticity: A comparison of three Centaurea congeners

Allopolyploid origin of highly invasive Centaurea stoebe s.l. (Asteraceae)

New habitats, new menaces: <i>Centaurea x kleinii (C. moncktonii x C. solstitialis)</i>, a new hybrid species between two alien weeds

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