Natural Delineation, Molecular Phylogeny and Floral Evolution in <i>Campanula</i>

Roquet, Cristina; Sáez, Llorenç; Aldasoro, Juan José; Susanna, Alfonso; Alarcón, María Luisa; Garcia‐Jacas, Núria

doi:10.1600/036364408783887465

Cited by 86 publications

(129 citation statements)

References 76 publications

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“…According to previous studies Shulkina et al, 2003;Cosner et al, 2004;Roquet et al, 2008;Stefanovic et al, 2008), Campanula is paraphyletic in its current generic circumscription, with many satellite genera nested within it. Campanula appears divided into two main clades: a large core of Campanula species that includes related genera (Adenophora Fisch., Asyneuma Griseb.…”

Section: Introductionmentioning

confidence: 94%

“…These studies show that the tribe Platycodoneae (including all the genera with colpate or colporate pollen) is the sister group of the tribes Wahlenbergieae and Campanuleae, which constitute together a well-supported clade (Cosner et al, 2004). Recent works about the phylogenetic relationships of the genus Campanula and allied genera Cosner et al, 2004;Roquet et al, 2008) have shown that the tribe Campanuleae sensu Yeo (1993) should include also Edraianthus DC., which was originally placed in Wahlenbergieae (Schönland, 1889) because of its irregular fruit dehiscence. Following these studies, here we consider that Platycodoneae includes the genera with sepals alternating with carpels and colpate or colporate pollen, while Wahlenbergieae and Campanuleae show opposite sepals and porate pollen (Dunbar, 1975;Thulin, 1975;Yeo, 1993;Cosner et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…), plus a clade constituted by Musschia Dumort. and two Campanula species Roquet et al, 2008). Characters related to flower morphology have proven to be of little usefulness in the natural delimitation of the group, as they are probably under strong selective pressures from pollinators (Roquet et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…and two Campanula species Roquet et al, 2008). Characters related to flower morphology have proven to be of little usefulness in the natural delimitation of the group, as they are probably under strong selective pressures from pollinators (Roquet et al, 2008). Fruit dehiscence has also been used as a diagnostic character by some authors, but Kolakovsky (1986) and Stefanovic et al (2008) have shown that this character is homoplasic.…”

Section: Introductionmentioning

confidence: 99%

“…Eddie et al (2003) hypothesized that Campanula and related genera evolved in the Mediterranean region, from where they rapidly spread over other Northern Hemisphere landmasses during pre-glacial times. Regardless of the postulated geographic origin, the great variety of distributions, ecological habitats, morphological characters, reproductive systems, and chromosome numbers exhibited by Campanula and allied genera (Roquet et al, 2008) suggests a history of high and rapid diversification and a complex biogeographic pattern.…”

Section: Introductionmentioning

confidence: 99%

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Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Roquet

Sanmartín

Garcia‐Jacas

et al. 2009

Molecular Phylogenetics and Evolution

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115

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a b s t r a c tWe reconstruct here the spatial and temporal evolution of the Campanula alliance in order to better understand its evolutionary history. To increase phylogenetic resolution among major groups (Wahlenbergieae-Campanuleae), new sequences from the rbcL region were added to the trnL-F dataset obtained in a previous study. These phylogenies were used to infer ancestral areas and divergence times in Campanula and related genera using a Bayesian approach to molecular dating and dispersal-vicariance analyses that takes into account phylogenetic uncertainty. The new phylogenetic analysis confirms Platycodoneae as the sister group of Wahlenbergieae-Campanuleae, the two last ones inter-graded into a well-supported clade. Biogeographic and dating analyses suggest that Western Asia and the Eastern Mediterranean have played a major role as centers of migration and diversification within the Campanula alliance, probably in relation to the intense orogenic activity that took place in this region during the Late Neogene, and that could have promoted isolation and allopatric speciation within lineages. Diversification rates within several Campanula lineages would have increased at the end of the Miocene, coinciding with the Messinian Stage. Strong selective pressures from climate changes and the expansion of mountainous regions during this period are suggested to explain the adaptation to drought, cold or disturbed environments observed in many Campanula species. Several independent long-distance dispersal events to North America are inferred within the Rapunculus clade, which seem to be related to high ploidy levels.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Roquet

Sanmartín

Garcia‐Jacas

et al. 2009

Molecular Phylogenetics and Evolution

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115

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Integrating environmental, molecular, and morphological data to unravel an ice‐age radiation of arctic‐alpine Campanula in western North America

DeChaine

Wendling

Forester

2014

Ecology and Evolution

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Many arctic-alpine plant genera have undergone speciation during the Quaternary. The bases for these radiations have been ascribed to geographic isolation, abiotic and biotic differences between populations, and/or hybridization and polyploidization. The Cordilleran Campanula L. (Campanulaceae Juss.), a monophyletic clade of mostly endemic arctic-alpine taxa from western North America, experienced a recent and rapid radiation. We set out to unravel the factors that likely influenced speciation in this group. To do so, we integrated environmental, genetic, and morphological datasets, tested biogeographic hypotheses, and analyzed the potential consequences of the various factors on the evolutionary history of the clade. We created paleodistribution models to identify potential Pleistocene refugia for the clade and estimated niche space for individual taxa using geographic and climatic data. Using 11 nuclear loci, we reconstructed a species tree and tested biogeographic hypotheses derived from the paleodistribution models. Finally, we tested 28 morphological characters, including floral, vegetative, and seed characteristics, for their capacity to differentiate taxa. Our results show that the combined effect of Quaternary climatic variation, isolation among differing environments in the mountains in western North America, and biotic factors influencing floral morphology contributed to speciation in this group during the mid-Pleistocene. Furthermore, our biogeographic analyses uncovered asynchronous consequences of interglacial and glacial periods for the timing of refugial isolation within the southern and northwestern mountains, respectively. These findings have broad implications for understanding the processes promoting speciation in arctic-alpine plants and the rise of numerous endemic taxa across the region.

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Phylogenetic relationships and phylogeography of relevant lineages within the complex Campanulaceae family in Macaronesia

Menezes

Romeiras

Sequeira

et al. 2017

Ecology and Evolution

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Macaronesia has long been recognized as a natural model for studying evolutionary processes in plant diversification. Several studies have attempted to focus on single lineages, and few have covered the diversification of a family across all the archipelagos. We used a comprehensive sample to clarify the phylogenetic relationships and the biogeographic history of the Macaronesian Campanulaceae. Hypotheses related to the colonization of these archipelagos will be used to examine the diversification patterns of different lineages. We sequenced the ITS region and six cpDNA markers (atpB, matK, petD, rbcL, trnL‐F, and psbA‐trnH) from 10 Campanulaceae species, including seven endemic species in Macaronesia. The phylogeny of these taxa was reconstructed using maximum parsimony, maximum likelihood, and Bayesian inference. To study the relationships within each lineage, haplotype networks were calculated using NeighborNet and TCS algorithms. Moreover, data were combined with fossil information to construct time‐calibrated trees for the Macaronesian Campanulaceae species. The phylogenetic analyses are largely congruent with current taxon circumscriptions, and all the endemic genera formed monophyletic clades, namely Azorina in Azores; Musschia in Madeira; and Campanula in Cape Verde. The Azorina clade and the Cape Verde endemic Campanula may share a common ancestor in North Africa, and the divergence was dated ca. 12.3 million years ago (Mya). The divergence of the Musschia clade began in the Pliocene ca. 3.4 Mya. Moreover, several examples of intraspecific variation were revealed among the native species with a clear geographic structured patterns, suggesting that cryptic diversity might exist within the native Macaronesian Campanulaceae when compared to the close mainland taxa (e.g., Campanula erinus, Trachelium caeruleum), but additional studies are needed to support the molecular data. This study highlights the power of combining data (e.g., phylogeny and divergence times, with species distribution data) for testing diversification hypotheses within the unique Macaronesian flora, providing useful information for future conservation efforts.

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Natural Delineation, Molecular Phylogeny and Floral Evolution in Campanula

Cited by 86 publications

References 76 publications

Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Reconstructing the history of Campanulaceae with a Bayesian approach to molecular dating and dispersal–vicariance analyses

Integrating environmental, molecular, and morphological data to unravel an ice‐age radiation of arctic‐alpine Campanula in western North America

Phylogenetic relationships and phylogeography of relevant lineages within the complex Campanulaceae family in Macaronesia

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