Does pollination syndrome reflect pollinator efficiency in Silene nutans?

Vanderplanck, Maryse; Touzet, Pascal; Rossum, Fabienne Van; Lahiani, Emna; Cauwer, Isabelle De; Dufaÿ, Mathilde

doi:10.1016/j.actao.2020.103557

Cited by 5 publications

(6 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2015; Vanderplanck et al . 2020). In our study, diurnal pollinator observations in natural conditions revealed that they visited more pink‐flowered plants and flowers.…”

Section: Discussionmentioning

confidence: 99%

The effects of pollination, herbivory and autonomous selfing on the maintenance of flower colour variation inSilenelittorea

et al. 2020

View full text Add to dashboard Cite

Intraspecific flower colour variation has been generally proposed to evolve as a result of selection driven by biotic or abiotic agents. In a polymorphic population of Silene littorea with pink‐ and white‐flowered plants, we studied pollinators, analysed flower colour perception and tested for differences in pollinator visitation. We also experimentally analysed pollinator limitation in fruit and seed set, and the degree of autonomous selfing. The incidence of florivory and leaf herbivory was compared over 3–4 years. Silene littorea is mainly pollinated by bees and butterflies. Pollinators preferred pink flowers, which did not show pollinator limitation. On the contrary, white flowers showed pollinator limitation in fruit set. White‐flowered plants had less floral display and higher levels of florivory than pink plants. Flower colour morphs of S. littorea can reproduce in the absence of pollinators by autonomous selfing, setting 20% and 12% of fruit and seeds in the pink morph and 27% and 20% in the white morph, respectively. Fruit set of white flowers produced by autonomous selfing did not differ from open‐pollinated flowers. In conclusion, S. littorea is pollinated by insects of different orders that more frequently visit pink flowers, which is reflected in pollinator limitation of fruit set in white flowers. Moreover, this species has a mixed mating system in which both colour morphs can reproduce in the absence of pollinators by autonomous selfing, although white flowers mainly produce fruits by autogamy. We suggest that reproductive assurance by autonomous selfing helps to maintain flower colour polymorphism in this population.

show abstract

“…2015; Vanderplanck et al . 2020). In our study, diurnal pollinator observations in natural conditions revealed that they visited more pink‐flowered plants and flowers.…”

Section: Discussionmentioning

confidence: 99%

The effects of pollination, herbivory and autonomous selfing on the maintenance of flower colour variation inSilenelittorea

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Bombus hortorum, B. terrestris, B. lapidarius) and syrphid flies (e.g. Episyrphus balteatus) (Jürgens et al, 1996;Vanderplanck et al, 2020), but they are not effective pollinators. Indeed, pollen deposition on stigmas by diurnal visitors is rare and the resulting seed production negligible (Vanderplanck et al, 2020).…”

Section: Studied Speciesmentioning

confidence: 99%

“…Episyrphus balteatus) (Jürgens et al, 1996;Vanderplanck et al, 2020), but they are not effective pollinators. Indeed, pollen deposition on stigmas by diurnal visitors is rare and the resulting seed production negligible (Vanderplanck et al, 2020). Nocturnal moths pollinating S. nutans include Noctuidae (e.g.…”

Section: Studied Speciesmentioning

confidence: 99%

“…Anania hortulata) and Sphingidae (e.g. Deilephila porcellus) (Jürgens et al, 1996;Vanderplanck et al, 2020). For nursery pollinators, 11 Hadena species (e.g.…”

Section: Studied Speciesmentioning

confidence: 99%

“…Therefore, 21 additional individuals, each consisting of a few freshly harvested flowering inflorescences collected in the nearby population Coi_Ca just before starting the experiment in the evening, were placed in pots filled with water (Figure S2) during the time of the experiment. Each hermaphrodite protandrous flower of S. nutans opens during a few successive nights: a first group of five stamens appears and dehisces during the first evening; the next day, it withers and is replaced by a second group of five stamens; from the third evening and for up to three days, three stigmas become receptive (Hepper, 1956;Vanderplanck et al, 2020). Powdered dyes were applied to dehiscent anthers of source individuals during two successive evenings at dusk.…”

Section: Pollen Dispersal Experiments Using Fluorescent Powdered Dyesmentioning

confidence: 99%

See 2 more Smart Citations

Pollinator sharing between reproductively isolated genetic lineages of Silene nutans

Cornet

Noret²,

Rossum³

2022

Front. Plant Sci.

View full text Add to dashboard Cite

High reciprocal pollination specialization leading to pollinator isolation can prevent interspecific pollen transfer and competition for pollinators. Sharing pollinators may induce mating costs, but it may also increase pollination services and pollen dispersal and offer more resources to pollinators, which may be important in case of habitat fragmentation leading to pollination disruption. We estimated pollen dispersal and pollinator isolation or sharing between two reproductively isolated genetic lineages of Silene nutans (Caryophyllaceae), which are rare and occur in parapatry in southern Belgium, forming two edaphic ecotypes. As inter-ecotypic crosses may lead to pollen wastage and inviable progeny, pollinator isolation might have evolved between ecotypes. Silene nutans is mainly pollinated by nocturnal moths, including nursery pollinators, which pollinate and lay their eggs in flowers, and whose caterpillars feed on flowers and seeds. Pollinator assemblages of the two ecotypes are largely unknown and inter-ecotypic pollen flows have never been investigated. Fluorescent powdered dyes were used as pollen analogues to quantify intra- and inter-ecotypic pollen transfers and seeds were germinated to detect chlorotic seedlings resulting from inter-ecotypic pollination. Nocturnal pollinators were observed using infrared cameras on the field, and seed-eating caterpillars were collected and reared to identify nursery pollinator species. No pollinator isolation was found: we detected long-distance (up to 5 km) inter-ecotypic dye transfers and chlorotic seedlings, indicating inter-ecotypic fertilization events. The rare moth Hadena albimacula, a nursery pollinator specialized on S. nutans, was found on both ecotypes, as well as adults visiting flowers (cameras recordings) as seed-eating caterpillars. However, S. nutans populations harbor different abundance and diversity of seed predator communities, including other rare nursery pollinators, suggesting a need for distinct conservation strategies. Our findings demonstrate the efficiency of moths, especially of nursery pollinators, to disperse pollen over long distances in natural landscapes, so to ensure gene flow and population sustainability of the host plant. Seed-predator specificities between the two reproductively isolated genetic lineages of S. nutans, and pollinator sharing instead of pollinator isolation when plants occur in parapatry, suggest that conservation of the host plant is also essential for sustaining (rare) pollinator and seed predator communities.

show abstract

Comprehensive analysis of floral scent and fatty acids in nectar of Silene nutans through modern analytical gas chromatography techniques

Spadafora

Eggermont

Křešťáková

et al. 2023

Journal of Chromatography A

View full text Add to dashboard Cite

Does pollination syndrome reflect pollinator efficiency in Silene nutans?

Cited by 5 publications

References 93 publications

The effects of pollination, herbivory and autonomous selfing on the maintenance of flower colour variation inSilenelittorea

The effects of pollination, herbivory and autonomous selfing on the maintenance of flower colour variation inSilenelittorea

Pollinator sharing between reproductively isolated genetic lineages of Silene nutans

Comprehensive analysis of floral scent and fatty acids in nectar of Silene nutans through modern analytical gas chromatography techniques

Contact Info

Product

Resources

About