Back to Gondwanaland: can ancient vicariance explain (some) Indian Ocean disjunct plant distributions?

Pirie, Michael D.; Litsios, Glenn; Du, Baoheng; Salamin, Nicolas; Kissling, Jonathan

doi:10.1098/rsbl.2015.0086

Cited by 22 publications

(17 citation statements)

References 29 publications

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“…The African-Malagasy-Indian (S Asian) disjunct distribution has been reported in other plant lineages (Raven and Axelrod 1974), e.g. in Cyphostemma (Vitaceae, Hearn et al 2018;Wen et al 2018) and Exacum (Gentianaceae, Yuan et al 2005;Pirie et al 2015). The closest relatives of the Ivodea-Vepris lineage (Figs.…”

Section: Biogeographic Affinities Of Malagasy Rutaceaementioning

confidence: 93%

Phylogenetic placement of Ivodea and biogeographic affinities of Malagasy Rutaceae

Appelhans

Wen

2020

Plant Syst Evol

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The genus Ivodea is endemic to Madagascar and the Comoros and consists of 30 species. This study is the first to include the genus in a molecular phylogenetic analysis. We sequenced the plastid trnL-trnF and the nuclear ITS regions for three Ivodea species and revealed that the genus is monophyletic and most closely related to the African and Malagasy Vepris, refuting earlier suggestions of a close relationship between Ivodea and the Asian, Malesian, Australasian and Pacific genera Euodia and Melicope. Ivodea and Vepris provide another example of closely related pairs of Rutaceous groups that have drupaceous and capsular/follicular fruits, respectively, thus further confirming that fruit types are not suited to delimit subfamilies in Rutaceae, as has often been done in the past. Ivodea was the last of the seven Malagasy genera to be included in the Rutaceae phylogeny, making it possible to conduct an assessment of biogeographic affinities of the genera that occur on the island. Our assessments based on sister-group relationships suggest that the eight lineages (representing seven genera) of Malagasy Rutaceae either have African or have Asian affinities. Two lineages have an African origin, and one lineage has an Asian origin. Taxon sampling is insufficient to interpret the directionality of dispersal events in the remaining lineages.

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Section: Biogeographic Affinities Of Malagasy Rutaceaementioning

confidence: 93%

Phylogenetic placement of Ivodea and biogeographic affinities of Malagasy Rutaceae

Appelhans

Wen

2020

Plant Syst Evol

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“…Cruciata. For the seed fossil, we used lognormal priors with an offset at 5.0 Ma, a mean of 0.7, and a standard deviation of 1.0, as applied by Pirie et al (2015) and Favre et al (2016) . We did not use uniform priors for sect.…”

Section: Methodsmentioning

confidence: 99%

The Complete Plastome Sequences of Seven Species in Gentiana sect. Kudoa (Gentianaceae): Insights Into Plastid Gene Loss and Molecular Evolution

Sun

Zhou

et al. 2018

Front. Plant Sci.

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The chloroplast (cp) genome is useful in the study of phylogenomics, molecular dating, and molecular evolution. Gentiana sect. Kudoa is a predominantly alpine flowering plant that is valued for its contributions to medicine, ecology, and horticulture. Previous evolutionary studies showed that the plastid gene loss pattern and intra-sectional phylogenetics in sect. Kudoa are still unclear. In this study, we compared 11 Gentiana plastomes, including 7 newly sequenced plastomes from sect. Kudoa, to represent its three serious: ser. Ornatae, ser. Verticillatae, and ser. Monanthae. The cp genome sizes of the seven species ranged from 137,278 to 147,156 bp. The plastome size variation mainly occurred in the small single-copy and long single-copy regions rather than the inverted repeat regions. Compared with sect. Cruciata, the plastomes in ser. Ornatae and ser. Verticillatae had lost approximately 11 kb of sequences containing 11 ndh genes. Conversely, far fewer losses were observed in ser. Monanthae. The phylogenetic tree revealed that sect. Kudoa was not monophyletic and that ser. Monanthae was more closely related to other sections rather than sect. Kudoa. The molecular dating analysis indicated that ser. Monanthae and sect. Kudoa diverged around 8.23 Ma. In ser. Ornatae and ser. Verticillatae, the divergence occurred at around 0.07–1.78 Ma. The nucleotide diversity analysis indicated that the intergenic regions trnH-psbA, trnK-trnQ, ycf3-trnS and rpl32-trnL constituted divergence hotspots in both sect. Kudoa and Gentiana, and would be useful for future phylogenetic and population genetic studies.

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“…For the Lisianthius fossil, we used lognormal priors, with an offset at 33.6 Ma (hard minimum bound, corresponding to the end of the Eocene), a mean of 0.7, and a standard deviation of 1.0, thus covering Middle and Late Eocene, as used by Matuszak et al (2015). For the second fossil, we used lognormal priors (offset 5.0; mean 0.7; standard deviation 1.00), as applied by Pirie et al (2015). This fossil being rather young, it might represent a very conservative minimum age for its clade.…”

Section: Divergence Time Analysesmentioning

confidence: 99%

Out‐of‐Tibet: the spatio‐temporal evolution of Gentiana (Gentianaceae)

Favre

Michalak

Chen

et al. 2016

Journal of Biogeography

132

181

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Aim We investigated the historical biogeography and diversification of Gentiana L. (Gentianaceae). Our study depicts the origin and dispersal routes of this alpine genus, and the role of the uplift of the Qinghai–Tibet Plateau (QTP) and past climate changes as triggers for its diversification. Location Tibeto‐Himalayan region and world‐wide mountain habitats. Methods Our sampling represents more than 50% of the extant Gentiana species, including all sections across their entire geographical ranges. We investigated the evolutionary history of Gentiana using phylogenetic reconstructions (maximum likelihood and Bayesian inference) of ITS, atpB–rbcL and trnL–trnF sequences, as well as molecular dating with beast. We tested two approaches of ancestral area reconstructions (DEC, DIVA) in BioGeoBEARS and investigated diversification rates using BAMM. Results The common ancestor of Gentiana and subtribe Gentianinae lived in the QTP region at around 34 (25–45) million years ago (Ma), and 40 (29–52) Ma respectively. From the surroundings of the QTP, Gentiana lineages dispersed to eastern China, Taiwan, Europe, North and South America, Australia and New Guinea, from mid‐Miocene onward (c. 15 Ma–present), with only one older dispersal event to Europe (c. 37–21 Ma). Diversification rates gradually increased over time, and two switches of diversification rates were identified in Gentianinae (c. 7 Ma, simultaneously in the Pneumonanthe/Cruciata lineage and in Tripterospermum). Main conclusions Gentiana existed in the QTP region throughout most of its uplift history following the India‐Asia collision. This region acted as the primary source area for dispersals to many areas of the world. Because steady increase in diversification rates coincides with the extension of the QTP, we argue that the museum theory rather than the explosive radiation theory prevails for gentians in this region, although rare shifts of diversification rates are associated with niche shifts across the alpine/subalpine ecotone.

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Back to Gondwanaland: can ancient vicariance explain (some) Indian Ocean disjunct plant distributions?

Cited by 22 publications

References 29 publications

Phylogenetic placement of Ivodea and biogeographic affinities of Malagasy Rutaceae

Phylogenetic placement of Ivodea and biogeographic affinities of Malagasy Rutaceae

The Complete Plastome Sequences of Seven Species in Gentiana sect. Kudoa (Gentianaceae): Insights Into Plastid Gene Loss and Molecular Evolution

Out‐of‐Tibet: the spatio‐temporal evolution of Gentiana (Gentianaceae)

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