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    Chloroplasts activity and PAP-signaling regulate programmed cell death in Arabidopsis

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    Type
    Article
    Authors
    Bruggeman, Quentin
    Mazubert, Christelle
    Prunier, Florence
    Lugan, Raphael
    Chan, Kai Xun
    Phua, Su Yin
    Pogson, Barry J.
    Krieger-Liszkay, Anja
    Delarue, Marianne
    Benhamed, Moussa cc
    Bergounioux, Catherine
    Raynaud, Cécile
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Desert Agriculture Initiative
    Plant Science
    Plant Science Program
    Date
    2016-01-08
    Online Publication Date
    2016-01-08
    Print Publication Date
    2016-03
    Permanent link to this record
    http://hdl.handle.net/10754/621468
    
    Metadata
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    Abstract
    Programmed cell death (PCD) is a crucial process both for plant development and responses to biotic and abiotic stress. There is accumulating evidence that chloroplasts may play a central role during plant PCD as for mitochondria in animal cells, but it is still unclear whether they participate in PCD onset, execution, or both. To tackle this question, we have analyzed the contribution of chloroplast function to the cell death phenotype of the myoinositol phosphate synthase1 (mips1) mutant that forms spontaneous lesions in a light-dependent manner. We show that photosynthetically active chloroplasts are required for PCD to occur in mips1, but this process is independent of the redox state of the chloroplast. Systematic genetic analyses with retrograde signaling mutants reveal that 3’-phosphoadenosine 5’-phosphate, a chloroplast retrograde signal that modulates nuclear gene expression in response to stress, can inhibit cell death and compromises plant innate immunity via inhibition of the RNA-processing 5’-3’ exoribonucleases. Our results provide evidence for the role of chloroplast-derived signal and RNA metabolism in the control of cell death and biotic stress response. © 2016 American Society of Plant Biologists. All Rights Reserved.
    Citation
    Bruggeman Q, Mazubert C, Prunier F, Lugan R, Chan KX, et al. (2016) Chloroplasts activity and PAP-signaling regulate programmed cell death in Arabidopsis. Plant Physiol: pp.01872.2015. Available: http://dx.doi.org/10.1104/pp.15.01872.
    Sponsors
    This work was supported by the Agence Nationale de la Recherche (grant nos. ANR 2010 JCJC1207 01 and MAPK-IPS ANR-2010-BLAN-1613-02).
    Publisher
    American Society of Plant Biologists (ASPB)
    Journal
    Plant Physiology
    DOI
    10.1104/pp.15.01872
    PubMed ID
    26747283
    ae974a485f413a2113503eed53cd6c53
    10.1104/pp.15.01872
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Plant Science Program; Desert Agriculture Initiative

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