Resolution of deep nodes yields an improved backbone phylogeny and a new basal lineage to study early evolution of Asteraceae

Panero, José Luis Calleja; Freire, Susana E.; Espinar, L. Ariza; Crozier, Bonnie S.; Barboza, Gloria Estela; Cantero, Juan José

doi:10.1016/j.ympev.2014.07.012

Cited by 109 publications

(130 citation statements)

References 28 publications

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“…Post burn-in samples from the marginal posterior distribution were combined using LogCombiner v1.5.4 (29) and trees summarized with TreeAnnotator (29). The topology of the tree broadly corresponds with that obtained by Panero et al (24).…”

Section: Methodssupporting

confidence: 86%

“…Table S1). We used a backbone tree derived from a molecular analysis of Beaulieu et al (4), with some additional taxa, following the recent comprehensive analysis of Panero et al (24). We conducted the analyses using the parsimony criterion as implemented in the software PAUP (25), enforcing the topological constraint, with the heuristic search option of 1,000 random addition replicates and tree bisection and reconnection branch swapping.…”

Section: Significancementioning

confidence: 99%

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Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica

Barreda

Palazzesi

Tellerı́a³

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

131

112

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The Asteraceae (sunflowers and daisies) are the most diverse family of flowering plants. Despite their prominent role in extant terrestrial ecosystems, the early evolutionary history of this family remains poorly understood. Here we report the discovery of a number of fossil pollen grains preserved in dinosaur-bearing deposits from the Late Cretaceous of Antarctica that drastically pushes back the timing of assumed origin of the family. Reliably dated to ∼76-66 Mya, these specimens are about 20 million years older than previously known records for the Asteraceae. Using a phylogenetic approach, we interpreted these fossil specimens as members of an extinct early diverging clade of the family, associated with subfamily Barnadesioideae. Based on a molecular phylogenetic tree calibrated using fossils, including the ones reported here, we estimated that the most recent common ancestor of the family lived at least 80 Mya in Gondwana, well before the thermal and biogeographical isolation of Antarctica. Most of the early diverging lineages of the family originated in a narrow time interval after the K/P boundary, 60-50 Mya, coinciding with a pronounced climatic warming during the Late Paleocene and Early Eocene, and the scene of a dramatic rise in flowering plant diversity. Our age estimates reduce earlier discrepancies between the age of the fossil record and previous molecular estimates for the origin of the family, bearing important implications in the evolution of flowering plants in general.

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Section: Methodssupporting

confidence: 86%

Section: Significancementioning

confidence: 99%

Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica

Barreda

Palazzesi

Tellerı́a³

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

131

112

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“…A split into three subfamilies with the establishment of the Barnadesioideae in 1992 by Bremer and Jansen (mainly based on cpDNA studies by Palmer 1987 andJansen et al 1992) was followed by a classification of 12 subfamilies and 43 tribes (Panero and Funk 2008;Funk et al 2009) reflecting the current knowledge about relationships among major groups within the Compositae due to increase of taxon and character sampling in molecular studies. Recently, Panero et al (2014) established a monotypic subfamily Famatinanthoideae and tribe Famatinantheae (representing an earlydiverging lineage of Asteraceae between Barnadesioideae and the rest of Asteraceae).…”

Section: Introductionmentioning

confidence: 99%

Cuticular Patterns on Stylar Hairs in Asteraceae: a New Micromorphological Feature

Erbar

Leins

2015

International Journal of Plant Sciences

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. The University of Chicago Press is collaborating with JSTOR to digitize, preserve and extend access to International Journal of Plant Sciences.Editor: Patrick S. Herendeen Premise of research. In the course of a detailed comparative study concerning style morphology (including 395 species of 258 genera covering all 44 tribes of the Asteraceae), we found a new microstructural feature, namely, often conspicuous cuticular patterns on the stylar hairs (involved in secondary pollen presentation) and stylar appendages. The observations raised questions as to whether the different striation patterns can be arranged in structural types and whether this new microcharacter could be of value in phylogenetic considerations.Methodology. Styles from liquid-preserved flowers or from herbarium material were studied by using scanning electron microscopy.Pivotal results. Five different patterns of cuticular striation can be discerned: crested pattern, triple pattern, double pattern, longitudinal pattern, and transverse pattern. By plotting the different cuticular patterns onto a generalized phylogenetic tree based on molecular data, it becomes obvious that there is considerable homoplasy in these features. Nevertheless, the cuticular patterns are still useful in characterizing some clades within the family. It is noteworthy that the small monogeneric subfamily Corymbioideae is characterized by a particular triple cuticular pattern on the stylar hairs that is otherwise found only rarely and isolated in some tribes (namely Mutisieae, Helenieae, Coreopsideae, and Heliantheae). The subfamily Mutisioideae is remarkable in the absence of simple patterns. A crested cuticular pattern is found only within the Mutisioideae (in Onoserideae and Mutisieae). Quite diverse in their cuticular patterns are the tribes Helenieae and Heliantheae within the Asteroideae.Conclusions. In comparison with the known influence of cuticular microstructures of petal cells on the wettability, we speculate that the cuticular striations of the stylar hairs increase the repellence of water drops in the flower, which would harm the viability of the pollen grains (due to osmosis, most pollen grains burst in pure water).

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“…Asteraceae is the largest family of vascular plants with more than 23,600 species distributed among 13 different lineages (Panero et al, 2014). By contrast, its closest relatives, Calyceraceae and Goodeniaceae, have around 54 and 404 species, respectively (Carolin, 2007; Pozner et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Evolution and Expression Patterns of CYC/TB1 Genes in Anacyclus: Phylogenetic Insights for Floral Symmetry Genes in Asteraceae

et al. 2017

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Homologs of the CYC/TB1 gene family have been independently recruited many times across the eudicots to control aspects of floral symmetry The family Asteraceae exhibits the largest known diversification in this gene paralog family accompanied by a parallel morphological floral richness in its specialized head-like inflorescence. In Asteraceae, whether or not CYC/TB1 gene floral symmetry function is preserved along organismic and gene lineages is unknown. In this study, we used phylogenetic, structural and expression analyses focused on the highly derived genus Anacyclus (tribe Anthemidae) to address this question. Phylogenetic reconstruction recovered eight main gene lineages present in Asteraceae: two from CYC1, four from CYC2 and two from CYC3-like genes. The species phylogeny was recovered in most of the gene lineages, allowing the delimitation of orthologous sets of CYC/TB1 genes in Asteraceae. Quantitative real-time PCR analysis indicated that in Anacyclus three of the four isolated CYC2 genes are more highly expressed in ray flowers. The expression of the four AcCYC2 genes overlaps in several organs including the ligule of ray flowers, as well as in anthers and ovules throughout development.

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Resolution of deep nodes yields an improved backbone phylogeny and a new basal lineage to study early evolution of Asteraceae

Cited by 109 publications

References 28 publications

Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica

Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica

Cuticular Patterns on Stylar Hairs in Asteraceae: a New Micromorphological Feature

Evolution and Expression Patterns of CYC/TB1 Genes in Anacyclus: Phylogenetic Insights for Floral Symmetry Genes in Asteraceae

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