Well‐resolved phylogeny supports repeated evolution of keel flowers as a synergistic contributor to papilionoid legume diversification

New Phytologist, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Summary The butterfly‐shaped keel flower is a highly successful floral form in angiosperms. These flowers steer the mechanical interaction with bees and thus are hypothesized to accelerate pollinator‐driven diversification. exceptionally labile evolution of Papilionoideae (Fabaceae) provides suitable system test this hypothesis. Using 1456 low‐copy nuclear loci, we confidently resolve early divergence history Papilionoideae. Constrained by backbone phylogeny, generated time tree for 3326 Fabales evaluate tempo mode diversification within state‐dependent evolutionary framework. first emerged c. 59.0 million years ago Papilionoideae, predating earliest fossil 3–4 years. Miocene coincided rapid flowers. At least six independent origins 32 losses were identified Cercidoideae, Polygalaceae. However, model was not favored. Lack radiation associated suggests that solely driven pollinator‐mediated selection, but instead an outcome synergistic effects multiple innovations, including nitrogen fixation chemical defense, as well dispersal into subtropical temperate regions.

Язык: Английский

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Leaf habit, maximum height and wood density of tropical woody flora in Africa: Phylogenetic constraints, covariation and responses to seasonal drought

Journal of Ecology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

Abstract How woody floras have evolved to cope with seasonal drought is still poorly known, especially in tropical Africa, which experiences a drier and more climate compared other regions. Here, we characterized the phylogenetic climatic distribution of three key traits associated desiccation avoidance or tolerance, focusing on self‐supporting species African forests savannas. We assembled large database newly compiled data leaf habit (evergreen vs deciduous, 1255 species) maximum height (1281 species), along new oven‐dry wood density (1363 niche relatedness. Bayesian mixed models were used assess signal niches trait attributes, explore individual responses investigate covariations, both general for each characterization niche. To date, this study represents first quantitative assessment flora though deciduousness widespread identified strong signal, notably biome affinity habit, but also major evolutionary changes. Relying solely was found be ineffective predicting insufficient accurately height. Among forests, effect became evident when considering covariations density. Small understory are likely evergreen dense wood, while canopy deciduous light wood. This pattern varies as coexist wettest sites. Synthesis . provides insights into how constraints shaped related strategies Africa. It pioneers modelling relation tree density, numerous their relationships.

Язык: Английский

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Generating Spatialised and Seasonal Deep‐Time Palaeoclimatic Information: Integration Into an Environmental‐Dependent Diversification Model

Global Ecology and Biogeography, Год журнала: 2025, Номер 34(4)

Опубликована: Апрель 1, 2025

ABSTRACT Aim Testing the impact of climate on diversification is a major goal evolutionary biology. Birth‐death models like palaeoenvironment‐dependent (PDD) models, for example, allow exploring potential correlations between dynamics and past environmental changes, such as temperature, among other abiotic variables. So far, studies have been limited to proxy‐derived global temperature trends, because these are only records that easily accessible almost continuous over multimillion‐year periods. Innovation In this study, we propose methodology generate spatialised and/or seasonal palaeotemperature time series. To do so, take advantage variables simulated by several ‘snapshots’ last 100 million years. Based hypothesis long‐term drift imprinted, some degree, all regional records, use record mean interpolation discrete simulations. We then evaluate possibility constraining PDD implemented in RPANDA, with hybrid assess if trends may be more relevant history given clade than used so far. Main Conclusions Our results show using series tend receive high statistical support. This offers promising perspectives refining our understanding evolution dynamics, calls continuing development deep‐time palaeoclimate modelling interdisciplinary studies.

Язык: Английский

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Legumes

Current Biology, Год журнала: 2025, Номер 35(9), С. R323 - R328

Опубликована: Май 1, 2025

Язык: Английский

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Comparative transcriptome analysis reveals lineage- and environment-specific adaptations in cacti from the Brazilian Atlantic Forest

Planta, Год журнала: 2024, Номер 260(1)

Опубликована: Май 22, 2024

Язык: Английский

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