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Title: The Arabidopsis thaliana RNA Editing Factor SLO2, which Affects the Mitochondrial Electron Transport Chain, Participates in Multiple Stress and Hormone Responses
Authors: Zhu, Qiang
Dugardeyn, Jasper
Zhang, Chunyi
Mühlenbock, Per
Eastmond, Peter J.
VALCKE, Roland 
De Coninck, Barbara
Oden, Sevgi
Karampelias, Michael
Cammue, Bruno P. A.
Prinsen, Els
Van der Straeten, Dominique
Issue Date: 2014
Source: MOLECULAR PLANT, 7 (2), p. 290-310
Abstract: Recently, we reported that the novel mitochondrial RNA editing factor SLO2 is essential for mitochondrial electron transport, and vital for plant growth through regulation of carbon and energy metabolism. Here, we show that mutation in SLO2 causes hypersensitivity to ABA and insensitivity to ethylene, suggesting a link with stress responses. Indeed, slo2 mutants are hypersensitive to salt and osmotic stress during the germination stage, while adult plants show increased drought and salt tolerance. Moreover, slo2 mutants are more susceptible to Botrytis cinerea infection. An increased expression of nuclear-encoded stress-responsive genes, as well as mitochondrial-encoded NAD genes of complex I and genes of the alternative respiratory pathway, was observed in slo2 mutants, further enhanced by ABA treatment. In addition, H2O2 accumulation and altered amino acid levels were recorded in slo2 mutants. We conclude that SLO2 is required for plant sensitivity to ABA, ethylene, biotic, and abiotic stress. Although two stress-related RNA editing factors were reported very recently, this study demonstrates a unique role of SLO2, and further supports a link between mitochondrial RNA editing events and stress response.
Notes: Van der Straeten, D (reprint author), Univ Ghent, Dept Physiol, Lab Funct Plant Biol, KL Ledeganckstr 35, B-9000 Ghent, Belgium.
Keywords: ABA; Arabidopsis thaliana; ethylene; plant stress; mitochondria; RNA editing; PPR protein; SLO2; stress.
Document URI:
ISSN: 1674-2052
e-ISSN: 1752-9867
DOI: 10.1093/mp/sst102
ISI #: 000330841400004
Rights: © The Author 2014. Published by the Molecular Plant Shanghai Editorial Office in association with Oxford University Press on behalf of CSPB and IPPE, SIBS, CAS.
Category: A1
Type: Journal Contribution
Validations: ecoom 2015
Appears in Collections:Research publications

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