Floral scents repel facultative flower visitors, but attract obligate ones

Junker, Robert R.; Blüthgen, Nico

doi:10.1093/aob/mcq045

Cited by 159 publications

(127 citation statements)

References 53 publications

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“…In the perennial herb Hesperis matronalis (Brassicaceae), the effects of temperature on floral scent production is nearly opposite to the patterns observed for the Lithophragma species studied here, with aromatics being less affected by low temperature than monoterpenes (Nielsen et al 1995). Thus, the variation in reaction norms between different compounds also could be dynamic and species-specific, and thereby reflect different ecological functions or evolutionary histories for different classes of volatiles (e.g., attractants vs. repellents) in each local environment (Junker and Blüthgen 2010;Theis et al 2007). Under this hypothesis, volatile compounds with emission rates most strongly tailored towards the daytime may be especially important for interaction with Greya moths.…”

Section: Discussioncontrasting

confidence: 59%

Floral Scent Contributes to Interaction Specificity in Coevolving Plants and Their Insect Pollinators

et al. 2014

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Chemical defenses, repellents, and attractants are important shapers of species interactions. Chemical attractants could contribute to the divergence of coevolving plant-insect interactions, if pollinators are especially responsive to signals from the local plant species. We experimentally investigated patterns of daily floral scent production in three Lithophragma species (Saxifragaceae) that are geographically isolated and tested how scent divergence affects attraction of their major pollinator-the floral parasitic moth Greya politella (Prodoxidae). These moths oviposit through the corolla while simultaneously pollinating the flower with pollen adhering to the abdomen. The complex and species-specific floral scent profiles were emitted in higher amounts during the day, when these day-flying moths are active. There was minimal divergence found in petal color, which is another potential floral attractant. Female moths responded most strongly to scent from their local host species in olfactometer bioassays, and were more likely to oviposit in, and thereby pollinate, their local host species in no-choice trials. The results suggest that floral scent is an important attractant in this interaction. Local specialization in the pollinator response to a highly specific plant chemistry, thus, has the potential to contribute importantly to patterns of interaction specificity among coevolving plants and highly specialized pollinators.

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Section: Discussioncontrasting

confidence: 59%

Floral Scent Contributes to Interaction Specificity in Coevolving Plants and Their Insect Pollinators

et al. 2014

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“…In addition, Xylocopa are efficient pollination agents, mainly for plants such as Mouriri with poricidal anthers (Buchmann 1983). Poricidal anthers could be a strategy for avoiding the harvest of pollen grains by less efficient visitors (Junker and Blüthgen 2010;De Luca and Vallejo-Marin 2013), reducing the numbers of visiting bees, as found in Tibouchina, Comolia and Mouriri (Buchmann and Buchmann 1981;Buchmann 1983;Oliveira-Rebouças and Gimenes 2004). Furthermore, the large quantity of pollen produced and the heteranthery presented by Mouriri flowers may, in part, contribute to mitigate the problem of the "pollen dilemma," guaranteeing their reproductive and feeding success (Vallejo-Marin et al 2009).…”

Section: Acta Amazonicamentioning

confidence: 99%

Flowering phenology of Mouriri guianensis (Melastomataceae) and its interaction with the crepuscular bee Megalopta amoena (Halictidae) in the restinga of Lençóis Maranhenses National Park, Brazil

et al. 2016

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Mouriri guianensis is a Brazilian endemic plant species distributed throughout the Amazon forest, Caatinga, Mata Atlântica and Cerrado domains, extending northward into Venezuela. The aim of this study was to describe the flowering phenology, floral biology and visitors associated with M. guianensis, highlighting the crepuscular bee species Megalopta amoena. Mouriri guianensis flowers from September to March. The flowering, the details of floral biology and the activities of floral visitors were observed for ten individual plants in December 2013, January-March 2014, September-December 2014 and JanuaryMarch 2015. The flowering peaks occurred in December 2013 and in November-December 2014. Bees were collected in January and February 2015. A total of 86 individuals belonging to six bee species were recorded visiting the flowers, with Xylocopa cearensis making more than one-half of the visits (60%), followed by Melipona subnitida and Megalopta amoena with 21.17% and 9.41% of the visits, respectively. The visitors showed activity peaks between 5:00 and 6:00 AM (66.27%). Buzz pollination was their predominant behavior. Megalopta amoena used its jaws to open the pore and the anther gland. Melipona subnitida used parts of the glands to seal the entrance to the colony. The visitors, except for Augochlopsis sp. and Trigona sp., are pollinators of M. guianensis. Plants having an extended anthesis can attract visitors both day and night. In this study, we present an example of a crepuscular pollination system. We suggest that blooming at twilight is a strategy used by the plant to escape unsuitable visitors. KEYWORDS: Pollination, insect-plant interaction, floral oil, crepuscular foraging. Um total de 86 indivíduos de seis espécies de abelhas foi registrado visitando as flores com Xylocopa cearensis realizando a maioria das visitas (60%), seguida por Melipona subnitida e Megalopta amoena com 21,17% e 9,41%, respectivamente. Os visitantes mostraram picos de atividade entre 5:00 -6:00 h (66,27%). O comportamento predominante foi o de vibração. Megalopta amoena utilizou suas mandíbulas para romper os poros da antera e glândula. Melipona subnitida utilizou partes das glândulas para a vedação da entrada da colônia. Os visitantes, a exceção de Augochlopsis sp. e Trigona sp., são polinizadores de M. guianensis. Plantas com longos períodos de antese podem atrair visitantes diurnos e noturnos. Aqui demonstramos um exemplo de sistema de polinização crepuscular, sugerindo que o fato florir durante o crepúsculo é uma estratégia da planta para escapar de visitantes inoportunos. PALAVRAS-CHAVE: Polinização, interação inseto-planta, óleo floral, forrageamento crepuscular. Flowering phenology of Mouriri guianensis (Melastomataceae) and its interaction with the crepuscular bee Megalopta amoena (Halictidae) in the restinga of Lençóis Maranhenses National Park, Brazil ACTA Fenologia da floração de

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“…2,3 Animalmediated selection on scent is predicted to be balancing due to conflicting selection pressures, if scents attract both mutualists and antagonists 4 but directional if a scent simultaneously attracts pollinators and repels enemies. 5 Of course, scent blends are generally composed of many volatiles and, thus, it is possible that different components of the blend will be under different forms of selection. 6 However, due to the difficulty of conducting large-scale scent collections in the field, as well as the necessity of specialized equipment and expertise, our knowledge of the evolutionary ecology of scents is elementary.…”

Section: Phenotypic Selection On Floral Scentmentioning

confidence: 99%

Natural selection on floral volatile production inPenstemon digitalis: Highlighting the role of linalool

Parachnowitsch

Burdon

Raguso

et al. 2013

Plant Signaling & Behavior

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Floral scents repel facultative flower visitors, but attract obligate ones

Cited by 159 publications

References 53 publications

Floral Scent Contributes to Interaction Specificity in Coevolving Plants and Their Insect Pollinators

Floral Scent Contributes to Interaction Specificity in Coevolving Plants and Their Insect Pollinators

Flowering phenology of Mouriri guianensis (Melastomataceae) and its interaction with the crepuscular bee Megalopta amoena (Halictidae) in the restinga of Lençóis Maranhenses National Park, Brazil

Natural selection on floral volatile production inPenstemon digitalis: Highlighting the role of linalool

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