Crescendo, diminuendo and subito of the trumpets: winds of change in the concerted evolution between flowers and pollinators in Salpichroa (Solanaceae)

Ibañez, Ana C.; Moré, Marcela; Salazar, Gerardo A.; Leiva, Santos; Barboza, Gloria Estela; Cocucci, Andrea A.

doi:10.1016/j.ympev.2018.11.020

Cited by 7 publications

(11 citation statements)

References 67 publications

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“…In fact, the floral primordial initiation of the labellum usually follows immediately after the development of the lateral petals (e.g., in Phalaenopsis: 4). Notably, in a previous study by Artuso et al (2021), the OU model was found to best explain whole-flower shape variation among Bulbophyllum Clade A species and interpreted to reflect pollinator-driven (directional and/or stabilizing) selection (see also Serrano-Serrano et al 2015;Joly et al 2018;Ibañez et al 2019;Reich et al 2020). In consequence, based on the present results, the same selective pressures might be invoked for sepals, lateral petals, and labellum + column-foot.…”

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confidence: 88%

Evidence for an evo‐devo‐derived hypothesis on three‐dimensional flower shape modularity in a tropical orchid clade

et al. 2022

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Covarying suites of phenotypic traits, or modules, are increasingly recognized to promote morphological evolution. However, information on how modularity influences flower diversity is rare and lacking for Orchidaceae. Here, we combine high-resolution X-ray computed tomography scanning with three-dimensional geometric morphometrics and phylogenetic comparative methods to test various hypotheses about three-dimensional patterns of flower evolutionary modularity in Malagasy Bulbophyllum orchids and examine rates and modes of module evolution. Based on the four evolutionary modules identified (i.e., sepals, lateral petals, labellum + column-foot, and column-part), our data support the hypothesis that both genetic-developmental and functional adaptive factors shaped evolutionary flower trait covariation in these tropical orchids. In line with "evo-devo" studies, we also find that the labellum evolved independently from the rest of the petal whorl. Finally, we show that modules evolved with different rates, and either in a neutral fashion (only column-part) or under selective constraints, as likely imposed by pollinators. Overall, this study supports current views that modular units can enhance the range and rate of morphological evolution.

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confidence: 88%

Evidence for an evo‐devo‐derived hypothesis on three‐dimensional flower shape modularity in a tropical orchid clade

et al. 2022

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“…Equal rates model was determined as the best model of evolution for pollination mode (discrete trait), using ace function as implemented in 'ape' version 5.5 (Paradis & Schliep 2019). Both calculations were made following the same procedure as reported in Ibañez et al (2019). Character-state history among pollination modes was traced using a Bayesian stochastic character mapping approach with the make.simmap function from 'phytools'.…”

Section: Variation In Flower Morphologymentioning

confidence: 99%

“…Functions ancThresh and phyl.vcv in 'phytools' package (Revell 2012), and gls in 'nlme' version 3.1-153 package (Pinheiro et al 2017) of R software (R Core Team 2021), were used, respectively. Pollination mode was characterised using the threshold model approach in which the values of a discrete variable (pollination mode) are estimated by an underlying, unobserved continuous trait called "liability" (Revell 2014;Ibañez et al 2019; Mor e et al 2020). Bayesian Markov Chain Monte Carlo (MCMC) approach was used to sample the liabilities of ancestral and tip species, and the relative positions of thresholds between pollination modes, from their joint posterior probability distribution (Revell 2014).…”

Section: Variation In Flower Morphologymentioning

confidence: 99%

Flower morphology evolution in Jaborosa (Solanaceae): shape and size variation associated with contrasting pollination modes

et al. 2023

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Flower morphology is considered an important factor in species diversification because it may influence the efficiency of pollination in different ways (e.g. attraction and mechanical fit with different groups of pollinators). In the present study, we quantified the variation in flower morphology (i.e. shape and size) of the diverse South American genus Jaborosa Juss. (Solanaceae) in relation to contrasting pollination modes: rewarding pollination either by moths or by generalist small insects versus brood‐site deceptive pollination by saprophilous flies. We examined variations of flower morphology in frontal (pollinator attraction) and sagittal (functional fit with pollinators) views in 12 Jaborosa species using geometric morphometric methods and comparative approaches to infer whether flower shape evolution, not attributable to flower allometry or phylogenetic relationship, is associated with shifts in pollination modes. We found remarkable variation in flower morphology among both Jaborosa species and pollination modes, largely in sagittal view. Evolutionary trends in shape of fly‐pollinated flowers were mainly attributable to changes in developmental trajectories. Variation in flower architecture facilitated differential pollen placement – on the proboscis of moths, and either on the back or ventral region of saprophilous flies – promoting diversification of the genus. Diversification of shape, independent of size, in most of the studied Jaborosa species would indicate adaptation to contrasting pollination modes.

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“…On the other hand, the climate change of the Pleistocene caused repetitive range expansion and contraction of species distribution, allowing down-slope migration through lowland elevation barriers such as valleys [ 47 ]. These scenarios of allopatric and clinal speciation are clearly relevant for explaining the remarkable concentration of plant radiations in the high-elevation Andes [ 48 , 49 , 50 , 51 ]. Divergence can result from selection by the environment or through interactions with other organisms, or even through stochastic processes (e.g., genetic drift) that result in phenotypic changes which may or may not be adaptive [ 52 , 53 , 54 ].…”

Section: Introductionmentioning

confidence: 99%

“…We provide information about floral scent collection method (SPE: Solid-phase extraction microtraps combined with thermal de-sorption, SPME: Solid-phase micro extraction fibers, Solvent: dynamic headspace desorbed with solvent), human perception of floral scent and pollination mode. Detailed information about pollinators’ identity is provided in [ 51 ] (Supplementary Table S7).…”

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confidence: 99%

Floral Scent Evolution in the Genus Jaborosa (Solanaceae): Influence of Ecological and Environmental Factors

Moré

Soteras

Ibañez

et al. 2021

Plants

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Floral scent is a key communication channel between plants and pollinators. However, the contributions of environment and phylogeny to floral scent composition remain poorly understood. In this study, we characterized interspecific variation of floral scent composition in the genus Jaborosa Juss. (Solanaceae) and, using an ecological niche modelling approach (ENM), we assessed the environmental variables that exerted the strongest influence on floral scent variation, taking into account pollination mode and phylogenetic relationships. Our results indicate that two major evolutionary themes have emerged: (i) a ‘warm Lowland Subtropical nectar-rewarding clade’ with large white hawkmoth pollinated flowers that emit fragrances dominated by oxygenated aromatic or sesquiterpenoid volatiles, and (ii) a ‘cool-temperate brood-deceptive clade’ of largely fly-pollinated species found at high altitudes (Andes) or latitudes (Patagonian Steppe) that emit foul odors including cresol, indole and sulfuric volatiles. The joint consideration of floral scent profiles, pollination mode, and geoclimatic context helped us to disentangle the factors that shaped floral scent evolution across “pollinator climates” (geographic differences in pollinator abundance or preference). Our findings suggest that the ability of plants in the genus Jaborosa to colonize newly formed habitats during Andean orogeny was associated with striking transitions in flower scent composition that trigger specific odor-driven behaviors in nocturnal hawkmoths and saprophilous fly pollinators.

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Crescendo, diminuendo and subito of the trumpets: winds of change in the concerted evolution between flowers and pollinators in Salpichroa (Solanaceae)

Cited by 7 publications

References 67 publications

Evidence for an evo‐devo‐derived hypothesis on three‐dimensional flower shape modularity in a tropical orchid clade

Evidence for an evo‐devo‐derived hypothesis on three‐dimensional flower shape modularity in a tropical orchid clade

Flower morphology evolution in Jaborosa (Solanaceae): shape and size variation associated with contrasting pollination modes

Floral Scent Evolution in the Genus Jaborosa (Solanaceae): Influence of Ecological and Environmental Factors

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