The University of Southampton
University of Southampton Institutional Repository

Abiotic stress and transgenics: implications for reproductive success and crop-to-wild gene flow in Brassicas

Abiotic stress and transgenics: implications for reproductive success and crop-to-wild gene flow in Brassicas
Abiotic stress and transgenics: implications for reproductive success and crop-to-wild gene flow in Brassicas
Various abiotic and biotic stressors affect crop and weed plant performance in agroecosystems Ozone (O-3) tolerance in plants is partly regulated by the genotype and phenotypical properties, and it vanes greatly in related species of wild and crop backgrounds Thus, a continuous increase in atmospheric O-3 concentration could change population dynamics of sexually compatible crop and weed species, and consequently affect crop-to-wild gene flow in the future One way to build resistance against a biotic stressor, in this case insect-mediated herbivory, in crop plants is transgene-mediated insecticidal toxin production In this study we aimed to describe how the physiological and phenological responses in a crop Brassica and its weedy relatives functioned to affect their comparative O-3 tolerance Furthermore, we studied how harbouring a transgene affects these responses in B napus and B rapa x transgenic B napus BC2F2 backcross hybrid plants to reveal any within-plant trade-offs among toxin production, growth and O-3 tolerance We found a higher number of O-3 symptoms but more effective compensatory assimilate allocation directed to reproduction for wild B rapa compared to crop B napus under elevated O-3 This result suggested that the invasion-orientated strategy of producing a high number of seeds when vegetative growth is limited might improve the performance of weedy species under elevated O-3 The probabilities for crop-to-wild transgene flow could be increased through higher seed production in hybrids under elevated O-3, but the germination of hybrid seeds in particular was hampered by O-3 The presence of transgenes did not perturb fecundity, within-plant biomass allocation or O-3 tolerance of B napus
1439-1791
513-521
Himanen, Sari J.
77f1198d-2b1f-4ed9-a5ad-12cc0864ce2b
Nerg, Anne-Marja
a27252ac-184e-4bb8-9b75-2a4f99c4cda0
Poppy, Guy M.
e18524cf-10ae-4ab4-b50c-e73e7d841389
Stewart Jr., C. Neal
f874657c-6481-48f5-bd30-53d43b897bfa
Holopainen, Jarmo K.
521dbaf2-663f-4863-b7f9-302b13465c68
Himanen, Sari J.
77f1198d-2b1f-4ed9-a5ad-12cc0864ce2b
Nerg, Anne-Marja
a27252ac-184e-4bb8-9b75-2a4f99c4cda0
Poppy, Guy M.
e18524cf-10ae-4ab4-b50c-e73e7d841389
Stewart Jr., C. Neal
f874657c-6481-48f5-bd30-53d43b897bfa
Holopainen, Jarmo K.
521dbaf2-663f-4863-b7f9-302b13465c68

Himanen, Sari J., Nerg, Anne-Marja, Poppy, Guy M., Stewart Jr., C. Neal and Holopainen, Jarmo K. (2010) Abiotic stress and transgenics: implications for reproductive success and crop-to-wild gene flow in Brassicas. Basic and Applied Ecology, 11 (6), 513-521. (doi:10.1016/j.baae.2010.06.007).

Record type: Article

Abstract

Various abiotic and biotic stressors affect crop and weed plant performance in agroecosystems Ozone (O-3) tolerance in plants is partly regulated by the genotype and phenotypical properties, and it vanes greatly in related species of wild and crop backgrounds Thus, a continuous increase in atmospheric O-3 concentration could change population dynamics of sexually compatible crop and weed species, and consequently affect crop-to-wild gene flow in the future One way to build resistance against a biotic stressor, in this case insect-mediated herbivory, in crop plants is transgene-mediated insecticidal toxin production In this study we aimed to describe how the physiological and phenological responses in a crop Brassica and its weedy relatives functioned to affect their comparative O-3 tolerance Furthermore, we studied how harbouring a transgene affects these responses in B napus and B rapa x transgenic B napus BC2F2 backcross hybrid plants to reveal any within-plant trade-offs among toxin production, growth and O-3 tolerance We found a higher number of O-3 symptoms but more effective compensatory assimilate allocation directed to reproduction for wild B rapa compared to crop B napus under elevated O-3 This result suggested that the invasion-orientated strategy of producing a high number of seeds when vegetative growth is limited might improve the performance of weedy species under elevated O-3 The probabilities for crop-to-wild transgene flow could be increased through higher seed production in hybrids under elevated O-3, but the germination of hybrid seeds in particular was hampered by O-3 The presence of transgenes did not perturb fecundity, within-plant biomass allocation or O-3 tolerance of B napus

Text
oppy_Abiotic_stress_and_transgenics.pdf - Other
Restricted to Repository staff only
Request a copy

More information

Published date: 2010

Identifiers

Local EPrints ID: 181703
URI: http://eprints.soton.ac.uk/id/eprint/181703
ISSN: 1439-1791
PURE UUID: 57d73c48-7002-443b-87ef-36871e9ebf20

Catalogue record

Date deposited: 26 Apr 2011 15:20
Last modified: 14 Mar 2024 02:57

Export record

Altmetrics

Contributors

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

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×