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  Systemic cytosolic Ca2+ elevation is activated upon wounding and herbivory in Arabidopsis

Kiep, V., Vadassery, J., Lattke, J., Maaß, J.-P., Boland, W., Peiter, E., et al. (2015). Systemic cytosolic Ca2+ elevation is activated upon wounding and herbivory in Arabidopsis. New Phytologist, 207(4), 996-1004. doi:10.1111/nph.13493.

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Kiep, Victoria, Author
Vadassery, Jyothilakshmi1, Author           
Lattke, Justus, Author
Maaß, Jan-Peter, Author
Boland, Wilhelm1, Author           
Peiter, Edgar, Author
Mithöfer, Axel1, 2, Author           
Affiliations:
1Department of Bioorganic Chemistry, Prof. Dr. W. Boland, MPI for Chemical Ecology, Max Planck Society, ou_24028              
2Research Group Dr. A. Mithöfer, Plant Defense Physiology, Department of Bioorganic Chemistry, Prof. Dr. W. Boland, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421907              

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 Abstract: Calcium ion (Ca2+) signalling triggered by insect herbivory is an intricate network with multiple components, involving positive and negative regulators. Real-time, noninvasive imaging of entire Arabidopsis thaliana rosettes was employed to monitor cytosolic free calcium ([Ca2+]cyt) elevations in local and systemic leaves in response to wounding and Spodoptera littoralis feeding. Luminescence emitted by the cytosol-localized Ca2+ reporter aequorin was imaged using a high-resolution photon-counting camera system. Spodoptera littoralis feeding on Arabidopsis induced both local and systemic [Ca2+]cyt elevations. Systemic [Ca2+]cyt signals were found predominantly in adjacent leaves with direct vascular connections to the treated leaf and appeared with a delay of 1 to 2 min. Simulated herbivory by wounding always induced a local [Ca2+]cyt response, but a systemic one only when the midrib was wounded. This systemic [Ca2+]cyt response was suppressed by the presence of insect-derived oral secretions as well as in a mutant of the vacuolar cation channel, Two Pore Channel 1 (TPC1). Our results provide evidence that in Arabidopsis insect herbivory induces both local and systemic [Ca2+]cyt signals that distribute within the vascular system. The systemic [Ca2+]cyt signal could play an important signalling role in systemic plant defence.

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 Dates: 2015-05-072015-05-212015-07
 Publication Status: Published in print
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 Identifiers: Other: BOL625
DOI: 10.1111/nph.13493
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Title: New Phytologist
  Other : New Phytol.
Source Genre: Journal
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Publ. Info: London : Academic Press.
Pages: - Volume / Issue: 207 (4) Sequence Number: - Start / End Page: 996 - 1004 Identifier: ISSN: 0028-646X
CoNE: https://pure.mpg.de/cone/journals/resource/954925334695