Hall, Casey R., Waterman, Jamie M., Vendegeer, Rebecca K. et al. (2 more authors) (2019) The Role of Silicon in Antiherbivore Phytohormonal Signalling. Frontiers in Plant Science. ISSN 1664-462X
Abstract
The role of plant silicon (Si) in the alleviation of abiotic and biotic stress is now widely recognised and researched. Amongst the biotic stresses, Si is known to increase resistance to herbivores through biomechanical and chemical mechanisms, although the latter are indirect and remain poorly characterised. Chemical defences are principally regulated by several antiherbivore phytohormones. The jasmonic acid (JA) signalling pathway is particularly important and has been linked to Si supplementation, albeit with some contradictory findings. In this Perspectives article, we summarise existing knowledge of how Si affects JA in the context of herbivory and present a conceptual model for the interactions between Si and JA signalling in wounded plants. Further, we use novel information from the model grass Brachypodium distachyon to underpin aspects of this model. We show that Si reduces JA concentrations in plants subjected to chemical induction (methyl jasmonate) and herbivory (Helicoverpa armigera) by 34% and 32%, respectively. Moreover, +Si plants had 13% more leaf macrohairs than −Si plants. From this study and previous work, our model proposes that Si acts as a physical stimulus in the plant, which causes a small, transient increase in JA. When +Si plants are subsequently attacked by herbivores, they potentially show a faster induction of JA due to this priming. +Si plants that have already invested in biomechanical defences (e.g. macrohairs), however, have less utility for JA-induced defences and show lower levels of JA induction overall.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2019 Hall, Waterman, Vandegeer, Hartley and Johnson. |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Biology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 23 Oct 2019 15:10 |
Last Modified: | 16 Oct 2024 16:09 |
Published Version: | https://doi.org/10.3389/fpls.2019.01132 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.3389/fpls.2019.01132 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:152597 |
Download
Filename: fpls_10_01132.pdf
Description: The Role of Silicon in Antiherbivore Phytohormonal Signalling
Licence: CC-BY 2.5