Pollination biology in an endangered rocky mountain toadflax (<i>Linaria cavanillesii</i>)

Carrió, Elena; Güemes, Jaime; Herreros, Raquel

doi:10.1080/11263504.2012.736424

Cited by 9 publications

(5 citation statements)

References 56 publications

(45 reference statements)

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“…Data on self-compatibility for Linaria species were taken from Valdés (1970), Docherty (1982), Carrió et al (2013), Voillemot et al (2018).…”

Section: Dna Extraction and Phylogenetic Analysismentioning

confidence: 99%

“…For example, both selfing and out crossing species of the genus Senecio occur in Australian unstable habitats (Lawrence 1985). Likewise, instances of selfing have been recorded in Linaria species both in stable habitats (e.g., grasslands and rock cliffs) and in unstable habitats (e.g., sand dunes and arable land) (Carrió et al 2013). When comparing selfing rates between different populations, it was found that outcrossing predominates in areas where populations are frequently visited by pollinators, whilst in populations where visitation to flowers does not occur, selfing is the most common way to reproduce (Ness et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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Investigating pollination strategies in disturbed habitats: the case of the narrow-endemic toadflax Linaria tonzigii (Plantaginaceae) on mountain screes

et al. 2021

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Plant mating systems may reflect an adaptation to a habitat type, with self-pollination being potentially common in unstable and disturbed conditions. We investigated the reproductive ecology of an Alpine, narrow-range toadflax, Linaria tonzigii Lona (Plantaginaceae), occurring in steep and dynamic mountain screes. We explored self-compatibility and spontaneous autogamy, seed viability, daily nectar production, pollinator behaviour and pollen transfer in wild populations, using hand pollination treatments, quantification of nectar volume, viability Tetrazolium assay, active pollinator sampling and video recordings, and UV-bright dust for pollen substitution. After ex novo sequencing of several genetic regions of L. tonzigii, we performed a multi-marker phylogenetic analysis of 140 Linaria species and tracked the occurrence of the self-compatibility trait. Our results showed that this species is self-compatible, pollinated mostly via spontaneous autogamy and pollinator-mediated geitonogamy, and self-pollinated seeds are as viable as cross-pollinated ones. Selfing could be due to pollinator rarity because, despite the studied species providing a high nectar volume, wild bees, moths and small beetles infrequently visited its flowers in the sparsely vegetated scree slopes. In addition, a preliminary survey showed a low genetic haplotype diversity in the study plant. Moreover, the phylogeny shows that self-compatibility is scattered in the tree, suggesting the adaptive nature of this reproductive trait in the genus Linaria. This study supports for theories that high prevalence of selfing is an adaptation to environments unfavourable for cross-pollination, and particularly where pollinators are rare, such as in perturbed, poorly vegetated high-elevation habitats.

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“…Data on self-compatibility for Linaria species were taken from Valdés (1970), Docherty (1982), Carrió et al (2013), Voillemot et al (2018).…”

Section: Dna Extraction and Phylogenetic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating pollination strategies in disturbed habitats: the case of the narrow-endemic toadflax Linaria tonzigii (Plantaginaceae) on mountain screes

et al. 2021

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“…Based on research on one of its populations, the species was previously thought to be SC (Carrió et al. ), but populations are in fact mostly SI (with a gametophytic system). Only one fully SC population is known, although some populations show a small degree of “leaky” self‐incompatibily (Voillemot and Pannell ).…”

Section: Methodsmentioning

confidence: 99%

“…Fruits typically mature approximately 30 days after fertilization (producing between about 100 and 150 seeds maximum), and seeds are dispersed passively when capsules open. Based on research on one of its populations, the species was previously thought to be SC (Carrió et al 2013), but populations are in fact mostly SI (with a gametophytic system). Only one fully SC population is known, although some populations show a small degree of "leaky" selfincompatibily (Voillemot and Pannell 2016).…”

Section: Study Speciesmentioning

confidence: 99%

Rapid loss of self‐incompatibility in experimental populations of the perennial outcrossing plantLinaria cavanillesii

2019

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Transitions from self‐incompatibility to self‐compatibility in angiosperms may be frequently driven by selection for reproductive assurance when mates or pollinators are rare, and are often succeeded by loss of inbreeding depression by purging. Here, we use experimental evolution to investigate the spread of self‐compatibility from one such population of the perennial plant Linaria cavanillesii into self‐incompatible (SI) populations that still have high inbreeding depression. We introduced self‐compatible (SC) individuals at different frequencies into replicate experimental populations of L. cavanillesii that varied in access to pollinators. Our experiment revealed a rapid shift to self‐compatibility in all replicates, driven by both greater seed set and greater outcross siring success of SC individuals. We discuss our results in the light of computer simulations that confirm the tendency of self‐compatibility to spread into SI populations under the observed conditions. Our study illustrates the ease with which self‐compatibility can spread among populations, a requisite for species‐wide transitions from self‐incompatibility to self‐compatibility.

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“…Grande population, where the trade-off between the seed number and the mean seed weight suggests resource limitation. However, the overall reproductive fitness of entomophilous species depends not only on the interaction with predators but also with pollinators (Östergård et al 2007;Galloni et al 2008;Carrió et al 2013). Extra flowers might also function as ovule reserve, supporting the "bet hedging hypothesis" (Stephenson 1981).…”

Section: Breeding System and Seed Predationmentioning

confidence: 97%

Biosystematic studies on the mountain plantGentiana luteaL. reveal variability in reproductive traits among subspecies

Rossi

Fisogni

Galloni

2015

Plant Ecology & Diversity

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Background: Taxonomic analysis provides a basic understanding for taxon identification and contributes to preliminary information for several branches of applied biology, while studies on reproductive strategies and plant fitness are essential to interpret population status and dynamics. Aims: We tested the reliability of diagnostic characters for identification and to characterise sexual resource allocation, the breeding system and seed predation among subspecies of Gentiana lutea. Methods: We analysed morphological characters in 70 herbarium specimens. In five natural populations we counted pollen and ovule numbers, assessed reproductive output after pollination treatments and evaluated pre-dispersal predation. Results: Taxonomic traits previously indicated as diagnostic were not sufficient to discriminate among subspecies. The pollen number and pollen:ovule (P:O) ratio varied strongly among subspecies; self-pollinated flowers produced a significantly lower number of seeds than open-pollinated flowers. Retention of empty fruits and high levels of pre-dispersal seed predation were observed in every case. Conclusions: The variation of P:O ratios among subspecies suggests different efficiency in pollen transfer. The species is self-compatible, nevertheless all subspecies require pollen vectors to enhance cross pollination and viable seed production. Fruit retention may have evolved as a strategy to reduce predation, ensuring higher plant fitness.

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Pollination biology in an endangered rocky mountain toadflax (Linaria cavanillesii)

Cited by 9 publications

References 56 publications

Investigating pollination strategies in disturbed habitats: the case of the narrow-endemic toadflax Linaria tonzigii (Plantaginaceae) on mountain screes

Investigating pollination strategies in disturbed habitats: the case of the narrow-endemic toadflax Linaria tonzigii (Plantaginaceae) on mountain screes

Rapid loss of self‐incompatibility in experimental populations of the perennial outcrossing plantLinaria cavanillesii

Biosystematic studies on the mountain plantGentiana luteaL. reveal variability in reproductive traits among subspecies

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