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

Plaza Wüthrich, Sonia; Weber, Johann; Pajonk, Simone; Thomas, Jérôme; Talke, Ina N.; Schellenberg, Maja; Pradervand, Sylvain; Burla, Bo; Geisler, Markus; Martinoia, Enrico; Krämer, Ute (2015). Wounding of Arabidopsis halleri leaves enhances cadmium accumulation that acts as a defense against herbivory. BioMetals, 28(3), pp. 521-528. Rapid Communications 10.1007/s10534-015-9829-9

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Plaza, Sonia

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0966-0844

Publisher:

Rapid Communications

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

19 Jun 2015 11:41

Last Modified:

14 Mar 2021 07:24

Publisher DOI:

10.1007/s10534-015-9829-9

Uncontrolled Keywords:

Cadmium (Cd), Metal hyperaccumulator plant, Iron (Fe), Jasmonate, Insect herbivory, Pieris rapae, Chemical ecology, Elemental defence, Phytoremediation

BORIS DOI:

10.7892/boris.69664

URI:

https://boris.unibe.ch/id/eprint/69664

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