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  Herbivore-induced volatile blends with both "fast" and "slow" components provide robust indirect defence in nature

Joo, Y., Schuman, M. C., Goldberg, J. K., Kim, S.-G., Yon, F., Brütting, C., et al. (2018). Herbivore-induced volatile blends with both "fast" and "slow" components provide robust indirect defence in nature. Functional Ecology, 32(1), 136-149. doi:10.1111/1365-2435.12947.

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http://dx.doi.org/10.1111/1365-2435.12947 (Publisher version)
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 Creators:
Joo, Youngsung1, 2, Author              
Schuman, Meredith C.1, Author              
Goldberg, Jay Keche1, Author              
Kim, Sang-Gyu1, Author              
Yon, Felipe1, 2, Author              
Brütting, Christoph1, 2, Author              
Baldwin, Ian Thomas1, Author              
Affiliations:
1Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society, ou_24029              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              

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 Abstract: 1.Plants emit volatile blends specific to particular herbivore interactions, which predators and parasitoids learn to associate with prey, increasing herbivore mortality and thereby plant fitness in a phenomenon termed indirect defense. 2.Herbivore-induced plant volatile blends commonly include both rapid, transient green leaf volatiles (GLVs) and delayed, enduring sesquiterpenes. A few laboratory studies indicate that insects can use plant volatiles to time behavior, but it is not known whether and how the temporal dynamics of plant volatile blends influence their function in indirect defense. 3.We characterized the activity of the native herbivores Manduca sexta and Tupiocoris notatus and their predators, Geocoris spp., on their host plant Nicotiana attenuata in their natural habitat. Diurnal predator activity only partially overlapped with variable herbivore activity, and herbivore attack at the beginning or end of the photophase elicited plant volatile blends with distinct GLV and sesquiterpene profiles. 4.In field trials, day-active Geocoris spp. predators preferred morning- over evening-typical GLV blends. Using plants genetically transformed so as to be unable to produce specific volatiles, we found that GLVs increased predation after dawn elicitations, whereas sesquiterpenes increased predation after dusk elicitations in field trials. 5.We conclude that predators respond to temporal differences in plant volatile blends, and that the different dynamics of specific volatiles permit effective indirect defense despite variable herbivore activity in nature.

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 Dates: 2017-08-012017-09-062018-01
 Publication Status: Published in print
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 Identifiers: DOI: 10.1111/1365-2435.12947
Other: ITB555
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Title: Functional Ecology
  Other : Funct. Ecol.
Source Genre: Journal
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Publ. Info: Oxford, U.K. : Blackwell Scientific Publications
Pages: - Volume / Issue: 32 (1) Sequence Number: - Start / End Page: 136 - 149 Identifier: ISSN: 0269-8463
CoNE: https://pure.mpg.de/cone/journals/resource/954925501172