Relative role of flower color and scent on pollinator attraction: experimental tests using F1 and F2 hybrids of daylily and nightlily

The daylily (Hemerocallis fulva) and nightlily (H. citrina) are typical examples of a butterfly-pollination system and a hawkmoth-pollination system, respectively. H. fulva has diurnal, reddish or orange-colored flowers and is mainly pollinated by diurnal swallowtail butterflies. H. citrina has noct...

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Veröffentlicht in:PloS one 2012-06, Vol.7 (6), p.e39010-e39010
Hauptverfasser: Hirota, Shun K, Nitta, Kozue, Kim, Yuni, Kato, Aya, Kawakubo, Nobumitsu, Yasumoto, Akiko A, Yahara, Tetsukazu
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container_start_page e39010
container_title PloS one
container_volume 7
creator Hirota, Shun K
Nitta, Kozue
Kim, Yuni
Kato, Aya
Kawakubo, Nobumitsu
Yasumoto, Akiko A
Yahara, Tetsukazu
description The daylily (Hemerocallis fulva) and nightlily (H. citrina) are typical examples of a butterfly-pollination system and a hawkmoth-pollination system, respectively. H. fulva has diurnal, reddish or orange-colored flowers and is mainly pollinated by diurnal swallowtail butterflies. H. citrina has nocturnal, yellowish flowers with a sweet fragrance and is pollinated by nocturnal hawkmoths. We evaluated the relative roles of flower color and scent on the evolutionary shift from a diurnally flowering ancestor to H. citrina. We conducted a series of experiments that mimic situations in which mutants differing in either flower color, floral scent or both appeared in a diurnally flowering population. An experimental array of 6 × 6 potted plants, mixed with 24 plants of H. fulva and 12 plants of either F1 or F2 hybrids, were placed in the field, and visitations of swallowtail butterflies and nocturnal hawkmoths were recorded with camcorders. Swallowtail butterflies preferentially visited reddish or orange-colored flowers and hawkmoths preferentially visited yellowish flowers. Neither swallowtail butterflies nor nocturnal hawkmoths showed significant preferences for overall scent emission. Our results suggest that mutations in flower color would be more relevant to the adaptive shift from a diurnally flowering ancestor to H. citrina than that in floral scent.
doi_str_mv 10.1371/journal.pone.0039010
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H. fulva has diurnal, reddish or orange-colored flowers and is mainly pollinated by diurnal swallowtail butterflies. H. citrina has nocturnal, yellowish flowers with a sweet fragrance and is pollinated by nocturnal hawkmoths. We evaluated the relative roles of flower color and scent on the evolutionary shift from a diurnally flowering ancestor to H. citrina. We conducted a series of experiments that mimic situations in which mutants differing in either flower color, floral scent or both appeared in a diurnally flowering population. An experimental array of 6 × 6 potted plants, mixed with 24 plants of H. fulva and 12 plants of either F1 or F2 hybrids, were placed in the field, and visitations of swallowtail butterflies and nocturnal hawkmoths were recorded with camcorders. Swallowtail butterflies preferentially visited reddish or orange-colored flowers and hawkmoths preferentially visited yellowish flowers. 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subjects Animal reproduction
Aquilegia formosa
Biology
Butterflies & moths
Camcorders
Color
Disa scullyi
Diurnal
Environmental science
Evaluation
Evolution
Flowering
Flowers
Flowers & plants
Hemerocallis - physiology
Hemerocallis fulva
Hybrids
Ipomopsis aggregata
Mutants
Mutation
Nocturnal
Odorants
Petunia integrifolia
Plant reproduction
Pollen
Pollination
Pollinators
title Relative role of flower color and scent on pollinator attraction: experimental tests using F1 and F2 hybrids of daylily and nightlily
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