Wounding of Arabidopsis halleri leaves enhances cadmium accumulation that acts as a defense against herbivory.

Details

Serval ID
serval:BIB_BE91CDEC2816
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Wounding of Arabidopsis halleri leaves enhances cadmium accumulation that acts as a defense against herbivory.
Journal
Biometals
Author(s)
Plaza S., Weber J., Pajonk S., Thomas J., Talke I.N., Schellenberg M., Pradervand S., Burla B., Geisler M., Martinoia E., Krämer U.
ISSN
1572-8773 (Electronic)
ISSN-L
0966-0844
Publication state
Published
Issued date
2015
Volume
28
Number
3
Pages
521-528
Language
english
Abstract
Approximately 0.2 % of all angiosperms are classified as metal hyperaccumulators based on their extraordinarily high leaf metal contents, for example >1 % zinc, >0.1 % nickel or >0.01 % cadmium (Cd) in dry biomass. So far, metal hyperaccumulation has been considered to be a taxon-wide, constitutively expressed trait, the extent of which depends solely on available metal concentrations in the soil. Here we show that in the facultative metallophyte Arabidopsis halleri, both insect herbivory and mechanical wounding of leaves trigger an increase specifically in leaf Cd accumulation. Moreover, the Cd concentrations accumulated in leaves can serve as an elemental defense against herbivory by larvae of the Brassicaceae specialist small white (Pieris rapae), thus allowing the plant to take advantage of this non-essential trace element and toxin. Metal homeostasis genes are overrepresented in the systemic transcriptional response of roots to the wounding of leaves in A. halleri, supporting that leaf Cd accumulation is preceded by systemic signaling events. A similar, but quantitatively less pronounced transcriptional response was observed in A. thaliana, suggesting that the systemically regulated modulation of metal homeostasis in response to leaf wounding also occurs in non-hyperaccumulator plants. This is the first report of an environmental stimulus influencing metal hyperaccumulation.
Keywords
Cadmium (Cd), Metal hyperaccumulator plant, Iron (Fe), Jasmonate, Insect herbivory, Pieris rapae, Chemical ecology, Elemental defence, Phytoremediation
Pubmed
Web of science
Open Access
Yes
Create date
28/05/2015 13:44
Last modification date
20/08/2019 16:32
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