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

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• 作者：Sonia Plaza ; Johann Weber ; Simone Pajonk ; Jér?me Thomas ; Ina N. Talke…
• 关键词：Cadmium (Cd) ; Metal hyperaccumulator plant ; Iron (Fe) ; Jasmonate ; Insect herbivory ; Pieris rapae ; Chemical ecology ; Elemental defence ; Phytoremediation
• 刊名：Biometals
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：28
• 期：3
• 页码：521-528
• 全文大小：536 KB
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• 作者单位：Sonia Plaza (1) (4)
  Johann Weber (2)
  Simone Pajonk (3)
  Jér?me Thomas (2)
  Ina N. Talke (3) (5)
  Maja Schellenberg (1)
  Sylvain Pradervand (2)
  Bo Burla (1) (6)
  Markus Geisler (1) (7)
  Enrico Martinoia (1)
  Ute Kr?mer (3)
  
  1. Institute of Plant Biology, University of Zurich, 8008, Zurich, Switzerland
  4. Institute of Plant Sciences, University of Bern, 3013, Bern, Switzerland
  2. Center for Integrative Genomics, University of Lausanne, 1015, Lausanne, Switzerland
  3. Department of Plant Physiology, Ruhr University Bochum, Universitaetsstrasse 150 ND3/30, 44801, Bochum, Germany
  5. Max Planck Institute of Molecular Plant Physiology, 14476, Potsdam, Germany
  6. University Hospital Zurich, University of Zurich, 8006, Zurich, Switzerland
  7. Department of Biology, University of Fribourg, 1700, Fribourg, Switzerland
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Biochemistry
  Physical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1572-8773

文摘

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.