Molecular Phylogeny and Pollen Evolution of Euphorbiaceae Tribe Plukenetieae

Cardinal‐McTeague, Warren M.; Gillespie, Lynn J.

doi:10.1600/036364416x691759

Cited by 23 publications

(31 citation statements)

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“…DNA analysis: DNA extracted from the nine Euphorbiaceae species was tested with one RAPD primer, two microsatellites (SSR) and four DNA genomic regions (ITS, ITS2, matK and rbcL). The utility of DNA barcoding genesfor resolving the phylogenetic relationships in Euphorbiaceae has been previously established (Loo et al, 1995;Cameron et al, 2001;Gustafsson et al, 2002;Wurdack et al, 2005;Pang et al, 2010;Cardinal-McTeague & Gillespie, 2016). The sequences of primers, types of bands and polymorphism percentages are shown in Table 2 and Fig.…”

Section: Resultsmentioning

confidence: 99%

Taxonomic and genetic relationships of some Euphorbiaceae species from Taif derived from molecular analyses

Fadl¹,

Ahmed²

2019

PAK.J.BOT.

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For genetic documentation and studying the taxonomic relationships, 9 species of family Euphorbiaceae; Euphorbia peplus, E. indica, E. prostrata, E. schimperi, E. tirucalli, E. granulata, Clutia myricoides, Ricinus communis, Chrozophora oblongifolia, were investigated depending on six isozymes and different molecular markers (RAPD, SSR, ITS, ITS2, matK and rbcL). Little data was obtained through the utility of RAPD and SSR primers. The four barcoding loci did not reveal discriminatory bands for all the examined species. The three loci; ITS, matK and rbcL, discriminated E. peplus and E. tirucalli from other species within genus Euphorbia. Banding patterns of the six isozyme systems showed great variability. The UPGMA dendrogram obtained depending on the 40 isozyme bands showed different findings from that of DNA. The DNA data was more accurate than isozymes data as it grouped the three species belonging to subg. Chamaesyce (E. indica, E. prostrata and E. granulata), but isozymes was more effective in separating the subfamily Acalyphoideae.

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Section: Resultsmentioning

confidence: 99%

Taxonomic and genetic relationships of some Euphorbiaceae species from Taif derived from molecular analyses

Fadl¹,

Ahmed²

2019

PAK.J.BOT.

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“…Species that could not be sampled were either rare and known only from type collections ( P. multiglandulosa , P. procumbens ) or material was unavailable ( P. carolis-vegae ). We used five accessions of two closely related taxa in Plukenetiinae ( Haematostemon guianensis and Romanoa tamnoides ) as outgroups [6]. The relationship of Romanoa as the sister genus of Plukenetia is well established with molecular and morphological evidence [1, 6, 33].…”

Section: Methodsmentioning

confidence: 99%

“…1), which provides a unique opportunity to investigate the genetic controls and ecological drivers of seed size in a well-defined group of species. Presently, the phylogeny of Plukenetia , based on two molecular markers and indel gap-coded data, is missing a significant component of species diversity and requires improved resolution and branch support [6], all of which must be addressed before evolutionary studies can take place on this clade. Here, we develop an improved phylogenetic hypothesis for Plukenetia using near-exhaustive taxon sampling across five nuclear and two plastid molecular markers, including two novel low-copy nuclear genes we developed for phylogenetic analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Since large seeded species are present in most taxonomic groupings of Plukenetia , we hypothesize that there was a single origin of large seeds in the ancestor of the genus. This hypothesis invokes at least three shifts back to smaller seeds based on the current Plukenetia phylogeny [6]. Presently, seed size concepts in Plukenetia are informal and oversimplified (e.g., “small versus large”) considering the breadth of variation (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Hedraiostylus , containing two species (one with an uncommon subshrub growth form) from semi-arid savannas of Africa, and P. corniculata from Southeast Asia; and (5) an informal species group from Madagascar [2], containing three species found in dry tropical forest, with two species found exclusively on tsingy limestone. Molecular phylogenetic analysis of Plukenetieae largely supports the morphology-based classification of Plukenetia , although species group relationships need improved resolution and support [6].…”

Section: Introductionmentioning

confidence: 99%

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Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species

et al. 2019

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BackgroundPlukenetia is a small pantropical genus of lianas and vines with variably sized edible oil-rich seeds that presents an ideal system to investigate neotropical and pantropical diversification patterns and seed size evolution. We assessed the biogeography and seed evolution of Plukenetia through phylogenetic analyses of a 5069 character molecular dataset comprising five nuclear and two plastid markers for 86 terminals in subtribe Plukenetiinae (representing 20 of ~ 23 Plukenetia species). Two nuclear genes, KEA1 and TEB, were used for phylogenetic reconstruction for the first time. Our goals were: (1) produce a robust, time-dependent evolutionary framework for Plukenetia using BEAST; (2) reconstruct its biogeographical history with ancestral range estimation in BioGeoBEARS; (3) define seed size categories; (4) identify patterns of seed size evolution using ancestral state estimation; and (5) conduct regression analyses with putative drivers of seed size using the threshold model.ResultsPlukenetia was resolved into two major groups, which we refer to as the pinnately- and palmately-veined clades. Our analyses suggest Plukenetia originated in the Amazon or Atlantic Forest of Brazil during the Oligocene (28.7 Mya) and migrated/dispersed between those regions and Central America/Mexico throughout the Miocene. Trans-oceanic dispersals explain the pantropical distribution of Plukenetia, including from the Amazon to Africa in the Early Miocene (17.4 Mya), followed by Africa to Madagascar and Africa to Southeast Asia in the Late Miocene (9.4 Mya) and Pliocene (4.5 Mya), respectively. We infer a single origin of large seeds in the ancestor of Plukenetia. Seed size fits a Brownian motion model of trait evolution and is moderately to strongly associated with plant size, fruit type/dispersal syndrome, and seedling ecology. Biome shifts were not drivers of seed size, although there was a weak association with a transition to fire prone semi-arid savannas.ConclusionsThe major relationships among the species of Plukenetia are now well-resolved. Our biogeographical analyses support growing evidence that many pantropical distributions developed by periodic trans-oceanic dispersals throughout the Miocene and Pliocene. Selection on a combination of traits contributed to seed size variation, while movement between forest edge/light gap and canopy niches likely contributed to the seed size extremes in Plukenetia.Electronic supplementary materialThe online version of this article (10.1186/s12862-018-1308-9) contains supplementary material, which is available to authorized users.

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Pollen as the link between floral phenotype and fitness

Opedal

Pérez‐Barrales

Brito

et al. 2023

American J of Botany

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Pollen plays a key role in plant reproductive biology. Despite the long history of research on pollen and pollination, recent advances in pollen-tracking methods and statistical approaches to linking plant phenotype, pollination performance, and reproductive fitness yield a steady flow of exciting new insights. In this introduction to the Special Issue "Pollen as the Link Between Phenotype and Fitness," we start by describing a general conceptual model linking functional classes of floral phenotypic traits to pollinationrelated performance metrics and reproductive fitness. We use this model as a framework for synthesizing the relevant literature, highlighting the studies included in the Special Issue, and identifying gaps in our understanding and opportunities for further development of the field. The papers that follow in this Special Issue provide new insights into the relationships between pollen production, presentation, flower morphology, and pollination performance (e.g., pollen deposition onto stigmas), the role of pollinators in pollen transfer, and the consequences of heterospecific pollen deposition. Several of the studies demonstrate exciting experimental and analytical approaches that should pave the way for continued work addressing the intriguing role of pollen in linking plant phenotypes to reproductive fitness.

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Molecular Phylogeny and Pollen Evolution of Euphorbiaceae Tribe Plukenetieae

Cited by 23 publications

References 62 publications

Taxonomic and genetic relationships of some Euphorbiaceae species from Taif derived from molecular analyses

Taxonomic and genetic relationships of some Euphorbiaceae species from Taif derived from molecular analyses

Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species

Pollen as the link between floral phenotype and fitness

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