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Jasmonic acid-dependent regulation of seed dormancy following maternal herbivory in Arabidopsis

Singh, Prashant and Dave, Anuja and Vaistij, Fabian and Worrall, Dawn and Holroyd, Geoffrey Heys and Wells, Jonathan and Kaminski, Filip and Graham, Ian and Roberts, Michael Richard (2017) Jasmonic acid-dependent regulation of seed dormancy following maternal herbivory in Arabidopsis. New Phytologist. ISSN 0028-646X

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    Abstract

    Maternal experience of abiotic environmental factors such as temperature and light are well-known to control seed dormancy in many plant species. Maternal biotic stress alters offspring defence phenotypes, but whether it also affects seed dormancy is remains unexplored. We exposed Arabidopsis thaliana plants to herbivory and investigated plasticity in germination and defence phenotypes in their offspring, along with the roles of phytohormone signalling in regulating maternal effects. Maternal herbivory resulted in the accumulation of jasmonic acid-isoleucine and loss of dormancy in seeds of stressed plants. Dormancy was also reduced by engineering seed-specific accumulation of jasmonic acid in transgenic plants. Loss of dormancy was dependent on an intact jasmonate signalling pathway and was associated with increased gibberellin content and reduced abscisic acid-sensitivity during germination. Altered dormancy was only observed in the first generation following herbivory, whereas defence priming was maintained for at least two generations. Herbivory generates a jasmonic acid-dependent reduction in seed dormancy, mediated by alteration of gibberellin and abscisic acid signalling. This is a direct maternal effect, operating independently from transgenerational herbivore resistance priming.

    Item Type: Article
    Journal or Publication Title: New Phytologist
    Additional Information: This is the peer reviewed version of the following article: Singh, P., Dave, A., Vaistij, F. E., Worrall, D., Holroyd, G. H., Wells, J. G., Kaminski, F., Graham, I. A. and Roberts, M. R. (2017), Jasmonic acid-dependent regulation of seed dormancy following maternal herbivory in Arabidopsis. New Phytol. doi:10.1111/nph.14525 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/nph.14525/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
    Uncontrolled Keywords: Abscisic acid ; Arabidopsis thaliana ; defence ; dormancy ; herbivory ; jasmonic acid ; priming ; seeds
    Subjects:
    Departments: Faculty of Science and Technology > Lancaster Environment Centre
    ID Code: 84893
    Deposited By: ep_importer_pure
    Deposited On: 27 Feb 2017 13:50
    Refereed?: Yes
    Published?: Published
    Last Modified: 27 Apr 2017 06:57
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/84893

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