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  Multiple calmodulin-like proteins in Arabidopsis are induced by insect-derived (Spodoptera littoralis) oral secretion

Vadassery, J., Scholz, S. S., & Mithöfer, A. (2012). Multiple calmodulin-like proteins in Arabidopsis are induced by insect-derived (Spodoptera littoralis) oral secretion. Plant Signaling & Behavior, 7(10), 1277-1280. doi:10.4161/psb.21664.

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BOL543.pdf (Publisher version), 692KB
 
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BOL543s1.pdf (Supplementary material), 358KB
 
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Vadassery, Jyothilakshmi1, 2, Author              
Scholz, S. S.1, 2, Author              
Mithöfer, Axel1, 3, Author              
Affiliations:
1Department of Bioorganic Chemistry, Prof. Dr. W. Boland, MPI for Chemical Ecology, Max Planck Society, ou_24028              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              
3Research 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: Throughout their life, plants are challenged by various abiotic and biotic stress factors. Among those are attacks from herbivorous insects. The molecular mechanisms underlying the detection of herbivores and the subsequent signal transduction are not well understood. As a second messenger, fluxes in intracellular Ca2+ levels play a key role in mediating stress response pathways. Ca2+ signals are decoded by Ca2+ sensor proteins such as calmodulin-like proteins (CMLs). Here, we demonstrate that recombinant CML37 behaves like a Ca2+ sensor in vitro and, in Arabidopsis, AtCML37 is induced by mechanical wounding as well as by infestation with larvae of the generalist lepidopteran herbivore Spodoptera littoralis. Loss of function of CML37 led to a better feeding performance of larvae suggesting that CML37 is a positive defense regulator. No herbivory-induced changes in secondary metabolites such as glucosinolates or flavonoids were detected in cml37 plants, although a significant reduction in the accumulation of jasmonates was observed, due to reduced expression of JAR1 mRNA and cellular enzyme activity. Consequently, the expression of jasmonate-responsive genes was reduced as well. Summarizing, our results suggest that the Ca2+ sensor protein, CML37, functions as a positive regulator in Ca2+ signaling during herbivory, connecting Ca2+ and jasmonate signaling.

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 Dates: 2012-07-292012-10-04
 Publication Status: Published online
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 Identifiers: Other: BOL543
DOI: 10.4161/psb.21664
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Title: Plant Signaling & Behavior
  Other : Plant Signaling and Behavior
Source Genre: Journal
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Publ. Info: Rio Grande St., Austin : Landes Bioscience
Pages: - Volume / Issue: 7 (10) Sequence Number: - Start / End Page: 1277 - 1280 Identifier: ISSN: 1559-2316
CoNE: https://pure.mpg.de/cone/journals/resource/1559-2316