Pollen dispersal and breeding structure in a hawkmoth-pollinated Pampa grasslands species<i>Petunia axillaris</i>(Solanaceae)

Turchetto, Caroline; Lima, Jacqueline de Souza; Rodrigues, Daniele Munareto; Bonatto, Sandro L.; Freitas, Loreta B.

doi:10.1093/aob/mcv025

Cited by 39 publications

(35 citation statements)

References 83 publications

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“…Regardless, the pollen dispersal distances observed in this study are comparable to those in other hawkmoth-pollinated plants (e.g. Finger et al 2014;Turchetto et al 2015). Although a rigorous estimation of pollen dispersal kernels was not the focus of this study, our results suggest the potential for extensive long-distance pollen movement in O. harringtonii.…”

Section: Pollinator Identity and Pollen Dispersalsupporting

confidence: 73%

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Pollinator identity and spatial isolation influence multiple paternity in an annual plant

Rhodes

Fant²,

Skogen³

2017

Molecular Ecology

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The occurrence and extent of multiple paternity is an important component of variation in plant mating dynamics. However, links between pollinator activity and multiple paternity are generally lacking, especially for plant species that attract functionally diverse floral visitors. In this study, we separated the influence of two functionally distinct floral visitors (hawkmoths and solitary bees) and characterized their impacts on multiple paternity in a self-incompatible, annual forb, Oenothera harringtonii (Onagraceae). We also situated pollinator-mediated effects in a spatial context by linking variation in multiple paternity to variation in plant spatial isolation. We documented pronounced differences in the number of paternal sires as function of pollinator identity: on average, the primary pollinator (hawkmoths) facilitated mating with nearly twice as many pollen donors relative to the secondary pollinator (solitary bees). This effect was consistent for both isolated and nonisolated individuals, but spatial isolation imposed pronounced reductions on multiple paternity regardless of pollinator identity. Considering that pollinator abundance and pollen dispersal distance did not vary significantly with pollinator identity, we attribute variation in realized mating dynamics primarily to differences in pollinator morphology and behaviour as opposed to pollinator abundance or mating incompatibility arising from underlying spatial genetic structure. Our findings demonstrate that functionally distinct pollinators can have strongly divergent effects on polyandry in plants and further suggest that both pollinator identity and spatial heterogeneity have important roles in plant mating dynamics.

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Section: Pollinator Identity and Pollen Dispersalsupporting

confidence: 73%

“…; Turchetto et al . ). Although a rigorous estimation of pollen dispersal kernels was not the focus of this study, our results suggest the potential for extensive long‐distance pollen movement in O. harringtonii .…”

Section: Discussionmentioning

confidence: 97%

Pollinator identity and spatial isolation influence multiple paternity in an annual plant

Rhodes

Fant²,

Skogen³

2017

Molecular Ecology

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“…This species has small seeds dispersed by wind (Kalisz et al, 2001), which usually leads to low levels of SGS (Hardy et al, 2006; Bizoux et al, 2009; Collevatti et al, 2010; de Souza Lima et al, 2015). However, T. hatschbachii occurs in rocky outcrops surrounded by forests, that are commonly reported as microbarriers to gene flow, which tends to increase the effect of isolation of grassland species in subtropical Brazil (Jesus et al, 2001; Leles et al, 2015; Turchetto et al, 2015). This scenery shows that landscape structure contributes not only to the differentiation of T. hatschbachii populations, but also to a fine‐scale genetic structure within populations, increasing the degree of kinship between close individuals within a single outcrop.…”

Section: Discussionmentioning

confidence: 99%

Naturally fragmented and isolated distribution in subtropical grassland patches affects genetic diversity and structure at different spatial scales: The case of Tibouchina hatschbachii, an endemic shrub from Brazil

Maia

Sujii

Silva-Pereira

et al. 2017

American J of Botany

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“…In mass-and synchronized-flowering species, the pollen dispersal distance may be short because of the high proportion of pollination among neighbors (White & Boshier 2000). Furthermore, species with limited dispersal may have diminished genetic neighborhoods, implying an increase in mating between relatives (Carrillo-Angeles et al 2011;Turchetto et al 2015). The dynamics of gene flow among populations is conditioned upon several factors, such as species dispersal ability, the geographic distance among individuals and populations, landscape features, and ecological factors that facilitate or constrain gene movement (Cushman et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity in Calibrachoa pygmaea (Solanaceae): A hawkmoth-pollinated nightshade from the Pampas

et al. 2019

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Calibrachoa pygmaea is a unique species of Calibrachoa, especially concerning its flower morphology and the environment where it occurs. The species is self-incompatible and is narrowly distributed in wet and flooded fields of the Pampas region. We characterize the genetic diversity of the species based on traditional plastid markers and newly developed nuclear microsatellites to identify drivers that guide its evolution. Our results identified markers that are informative and useful for studying the population structure of C. pygmaea, as well as that of other species of Calibrachoa. Both marker sets were congruent in developing conclusions regarding the evolutionary scenario of C. pygmaea, and revealed that the genetic variability and population structure of the species could be explained by common allele fixation or shared ancestral polymorphism, while its diversification can be attributed mainly to the species' dispersal ability and certain ecological features.

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Pollen dispersal and breeding structure in a hawkmoth-pollinated Pampa grasslands speciesPetunia axillaris(Solanaceae)

Cited by 39 publications

References 83 publications

Pollinator identity and spatial isolation influence multiple paternity in an annual plant

Pollinator identity and spatial isolation influence multiple paternity in an annual plant

Naturally fragmented and isolated distribution in subtropical grassland patches affects genetic diversity and structure at different spatial scales: The case of Tibouchina hatschbachii, an endemic shrub from Brazil

Genetic diversity in Calibrachoa pygmaea (Solanaceae): A hawkmoth-pollinated nightshade from the Pampas

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