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Effects of elevated carbon dioxide and ozone on volatile terpenoid emissions and multitrophic communication of transgenic insecticidal oilseed rape (Brassica napus)

Effects of elevated carbon dioxide and ozone on volatile terpenoid emissions and multitrophic communication of transgenic insecticidal oilseed rape (Brassica napus)
Effects of elevated carbon dioxide and ozone on volatile terpenoid emissions and multitrophic communication of transgenic insecticidal oilseed rape (Brassica napus)
• Does transgenically incorporated insect resistance affect constitutive and herbivore-inducible terpenoid emissions and multitrophic communication under elevated atmospheric CO2 or ozone (O3)? This study aimed to clarify the possible interactions between allocation to direct defences (Bacillus thuringiensis (Bt) toxin production) and that to endogenous indirect defences under future climatic conditions.

• Terpenoid emissions were measured from vegetative-stage non-Bt and Bt Brassica napus grown in growth chambers under control or doubled CO2, and control (filtered air) or 100 ppb O3. The olfactometric orientation of Cotesia vestalis, an endoparasitoid of the herbivorous diamondback moth (Plutella xylostella), was assessed under the corresponding CO2 and O3 concentrations.

• The response of terpenoid emission to CO2 or O3 elevations was equivalent for Bt and non-Bt plants, but lower target herbivory reduced herbivore-inducible emissions from Bt plants. Elevated CO2 increased emissions of most terpenoids, whereas O3 reduced total terpenoid emissions. Cotesia vestalis orientated to host-damaged plants independent of plant type or CO2 concentration. Under elevated O3, host-damaged non-Bt plants attracted 75% of the parasitoids, but only 36.8% of parasitoids orientated to host-damaged Bt plants.

• Elevated O3 has the potential to perturb specialized food-web communication in Bt crops.
brassica napus ssp. oleifera (oilseed rape), cotesia vestalis, elevated CO2, elevated ozone, plant volatiles, plutella xylostella (diamondback moth), transgenic plants, tritrophic interactions
0028-646X
174-186
Himanen, Sari J.
77f1198d-2b1f-4ed9-a5ad-12cc0864ce2b
Nerg, Anne-Marja
a27252ac-184e-4bb8-9b75-2a4f99c4cda0
Nissinen, Anne
23302a1e-873d-4ffd-a3a1-cb56a7dcb072
Pinto, Delia M.
6595d071-1003-418c-a62d-3655e63512e8
Stewart, C. Neal
38a51ac2-05bb-48b8-9109-b17b07c384b3
Poppy, Guy M.
e18524cf-10ae-4ab4-b50c-e73e7d841389
Holopainen, Jarmo K.
521dbaf2-663f-4863-b7f9-302b13465c68
Himanen, Sari J.
77f1198d-2b1f-4ed9-a5ad-12cc0864ce2b
Nerg, Anne-Marja
a27252ac-184e-4bb8-9b75-2a4f99c4cda0
Nissinen, Anne
23302a1e-873d-4ffd-a3a1-cb56a7dcb072
Pinto, Delia M.
6595d071-1003-418c-a62d-3655e63512e8
Stewart, C. Neal
38a51ac2-05bb-48b8-9109-b17b07c384b3
Poppy, Guy M.
e18524cf-10ae-4ab4-b50c-e73e7d841389
Holopainen, Jarmo K.
521dbaf2-663f-4863-b7f9-302b13465c68

Himanen, Sari J., Nerg, Anne-Marja, Nissinen, Anne, Pinto, Delia M., Stewart, C. Neal, Poppy, Guy M. and Holopainen, Jarmo K. (2009) Effects of elevated carbon dioxide and ozone on volatile terpenoid emissions and multitrophic communication of transgenic insecticidal oilseed rape (Brassica napus). New Phytologist, 181 (1), 174-186. (doi:10.1111/j.1469-8137.2008.02646.x). (PMID:19076723)

Record type: Article

Abstract

• Does transgenically incorporated insect resistance affect constitutive and herbivore-inducible terpenoid emissions and multitrophic communication under elevated atmospheric CO2 or ozone (O3)? This study aimed to clarify the possible interactions between allocation to direct defences (Bacillus thuringiensis (Bt) toxin production) and that to endogenous indirect defences under future climatic conditions.

• Terpenoid emissions were measured from vegetative-stage non-Bt and Bt Brassica napus grown in growth chambers under control or doubled CO2, and control (filtered air) or 100 ppb O3. The olfactometric orientation of Cotesia vestalis, an endoparasitoid of the herbivorous diamondback moth (Plutella xylostella), was assessed under the corresponding CO2 and O3 concentrations.

• The response of terpenoid emission to CO2 or O3 elevations was equivalent for Bt and non-Bt plants, but lower target herbivory reduced herbivore-inducible emissions from Bt plants. Elevated CO2 increased emissions of most terpenoids, whereas O3 reduced total terpenoid emissions. Cotesia vestalis orientated to host-damaged plants independent of plant type or CO2 concentration. Under elevated O3, host-damaged non-Bt plants attracted 75% of the parasitoids, but only 36.8% of parasitoids orientated to host-damaged Bt plants.

• Elevated O3 has the potential to perturb specialized food-web communication in Bt crops.

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More information

Published date: 15 January 2009
Keywords: brassica napus ssp. oleifera (oilseed rape), cotesia vestalis, elevated CO2, elevated ozone, plant volatiles, plutella xylostella (diamondback moth), transgenic plants, tritrophic interactions
Organisations: Biological Sciences

Identifiers

Local EPrints ID: 155393
URI: http://eprints.soton.ac.uk/id/eprint/155393
ISSN: 0028-646X
PURE UUID: dc96dd85-e901-46f7-974b-3a319969f546

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Date deposited: 27 May 2010 15:21
Last modified: 14 Mar 2024 01:38

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Contributors

Author: Sari J. Himanen
Author: Anne-Marja Nerg
Author: Anne Nissinen
Author: Delia M. Pinto
Author: C. Neal Stewart
Author: Guy M. Poppy
Author: Jarmo K. Holopainen

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