Phylogeny of Pelargonium (Geraniaceae) Based on DNA Sequences from Three Genomes

Bakker, Freek T.; Culham, Alastair; Hettiarachi, Priyani; Touloumenidou, Tasoula; Gibby, Mary

doi:10.2307/4135485

Cited by 60 publications

(38 citation statements)

References 39 publications

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“…7; delimitation of these regions follow Schulze et al 1997;Linder and Kurzweil 1999). The winter and summer rainfall regions are floristically distinct, with the distributions of some plant groups focused in one region or the other (Gibbs Russell 1987;Linder and Mann 1998;Esler et al 1999;Goldblatt et al 2001;Ritz et al 2003;Bakker et al 2004). Many of the annual species of Zaluzianskya are endemic to the winter rainfall region, and many of the perennials occur solely in the summer rainfall region.…”

Section: Life Historymentioning

confidence: 95%

“…South Africa encompasses a wide variety of habitats and includes, despite its relatively small size, what has been considered one of only six floristic kingdoms in the world (Good 1974;Takhtajan 1986). Although phylogenetic research is being conducted on some of the plant taxa in this region (e.g., Linder 1996;Linder and Mann 1998;Kornhall et al 2001;Chesselet et al 2002;Goldblatt et al 2002;Ritz et al 2003;Bakker et al 2004;Randle 2004;Mort et al, in mss. ), the sheer diversity in the country has left many taxa unexplored (Smith et al 1996).…”

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confidence: 99%

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Phylogenetic Relationships within Zaluzianskya (Scrophulariaceae s. s., tribe Manuleeae): Classification Based on DNA Sequences from Multiple Genomes and Implications for Character Evolution and Biogeography

2005

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Zaluzianskya (Scrophulariaceae s.s., tribe Manuleeae) is a diverse genus of 55 species of annual and perennial herbs, endemic to southern Africa. This study used DNA sequence data from the nrDNA ITS regions, rpl16, and trnL-trnF to produce the first broad phylogenetic hypotheses for Zaluzianskya, allowing the first tests of the monophyly of the genus and its sections, as well as an examination of character evolution. Reyemia nemesioides was placed within Zaluzianskya with strong support. This is consistent with several morphological characteristics of both species of Reyemia. Sections Zaluzianskya and Holomeria are not monophyletic. The single species sampled from section Macrocalyx (Z. mirabilis) was nested within section Nycterinia according to the chloroplast and combined data, but placed sister to Nycterinia according to the ITS data. Several species do not form clades. Populations of Z. villosa and Z. gracilis were nested within a Z. affinis clade while Z. divaricata was nested within a Z. pusilla clade. Finally, populations of the sole day-flowering species within section Nycterinia, Z. microsiphon, were separated on the phylogenies. The source of this division is unknown but could be hybridization or convergent evolution via pollinator selection. Analyses suggest that the plesiomorphic condition for Zaluzianskya is annual, distributed within arid regions. Subsequent derivations of a perennial life history appear associated with distribution in relatively mesic regions.

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Section: Life Historymentioning

confidence: 95%

mentioning

confidence: 99%

Phylogenetic Relationships within Zaluzianskya (Scrophulariaceae s. s., tribe Manuleeae): Classification Based on DNA Sequences from Multiple Genomes and Implications for Character Evolution and Biogeography

2005

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“…Pelargonium is sister to the clade containing the remaining clades in the Geraniaceae, characterized by zygomorphic corollas and nectar spurs adnate to the pedicels. The genus comprises two main clades distinguished by molecular sequences, differences in chromosome size (see Bakker et al 2004) and potential for hybrid formation (Gibby et al 1996), but not by gross morphology. Branching from this deep bifurcation are five major clades (C1, C2, B, A1, and A2) well-supported as monophyletic by molecular sequence data.…”

Section: Study Systemmentioning

confidence: 99%

LEAF SHAPE EVOLUTION IN THE SOUTH AFRICAN GENUSPELARGONIUML’ HÉR. (GERANIACEAE)

Jones

Bakker²,

Schlichting

et al. 2009

Evolution

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Leaf shapes reflect complex assemblages of shape-determining elements, yet evolutionary studies tend to treat leaf shape as a single attribute, for example cordate or linear. As with all complex structures, individual elements of a leaf could theoretically evolve independently and at different rates to the extent permitted by genetic and functional limitations. We examined relative evolutionary lability of shape-determining elements in the highly diverse South African plant genus Pelargonium (Geraniaceae).We used SIMMAP to calculate Bayesian posterior probabilities for ancestral states of leaf-shape characters for major nodes across multiple phylogenetic trees. Trees were derived from a Bayesian analysis of DNA sequence data from four partitions. We found that shape elements differed in rates of character-state transformations across the tree. Leaf base, apex, and overall outline had low rates. Transformations in venation occurred at slightly higher rates and were associated with shifts in venation among major clades. Leaf margin type and overall leaf size showed intermediate rates, whereas high rates were observed in the extent of lamina lobing and functional leaf size. The results indicate that suites of elements characteristic of the recently evolved xerophytic lineage, for example pinnate venation, dissected lamina, and entire margins, were acquired piecemeal over nested levels of the phylogeny. K E Y W O R D S :Ancestral character-state reconstruction, functional leaf size, leaf venation, leaf evolution, xerophytic plants.

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“…Molecular systematic studies (e.g. Bakker et al, 2004) have confirmed that the section is monophyletic.…”

Section: Botanical Identity and Relationshipsmentioning

confidence: 78%

A historical, scientific and commercial perspective on the medicinal use of Pelargonium sidoides (Geraniaceae)

Brendler

Wyk

2008

Journal of Ethnopharmacology

147

115

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Phylogeny of Pelargonium (Geraniaceae) Based on DNA Sequences from Three Genomes

Cited by 60 publications

References 39 publications

Phylogenetic Relationships within Zaluzianskya (Scrophulariaceae s. s., tribe Manuleeae): Classification Based on DNA Sequences from Multiple Genomes and Implications for Character Evolution and Biogeography

Phylogenetic Relationships within Zaluzianskya (Scrophulariaceae s. s., tribe Manuleeae): Classification Based on DNA Sequences from Multiple Genomes and Implications for Character Evolution and Biogeography

LEAF SHAPE EVOLUTION IN THE SOUTH AFRICAN GENUSPELARGONIUML’ HÉR. (GERANIACEAE)

A historical, scientific and commercial perspective on the medicinal use of Pelargonium sidoides (Geraniaceae)

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