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The Arabidopsis thaliana RNA Editing Factor SLO2, which affects the mitochondrial electron transport chain, participates in multiple stress and hormone responses

(2014) MOLECULAR PLANT. 7(2). p.290-310
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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.
Keywords
stress, ABSCISIC-ACID, SLO2, PLANT-PATHOGEN INTERACTIONS, NUCLEAR GENE-EXPRESSION, SIGNAL-TRANSDUCTION, COMPLEX-I, PENTATRICOPEPTIDE REPEAT PROTEIN, PPR PROTEIN, TRANSCRIPTION FACTOR, OXIDATIVE STRESS, DYW DOMAIN, PPR protein, RNA editing, mitochondria, plant stress, ethylene, Arabidopsis thaliana, ABA

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Chicago
Zhu, Qiang, Jasper Dugardeyn, Chunyi Zhang, Per Mühlenbock, Peter J Eastmond, Roland Valcke, Barbara De Coninck, et al. 2014. “The Arabidopsis Thaliana RNA Editing Factor SLO2, Which Affects the Mitochondrial Electron Transport Chain, Participates in Multiple Stress and Hormone Responses.” Molecular Plant 7 (2): 290–310.
APA
Zhu, Qiang, Dugardeyn, J., Zhang, C., Mühlenbock, P., Eastmond, P. J., Valcke, R., De Coninck, B., et al. (2014). The Arabidopsis thaliana RNA Editing Factor SLO2, which affects the mitochondrial electron transport chain, participates in multiple stress and hormone responses. MOLECULAR PLANT, 7(2), 290–310.
Vancouver
1.
Zhu Q, Dugardeyn J, Zhang C, Mühlenbock P, Eastmond PJ, Valcke R, et al. The Arabidopsis thaliana RNA Editing Factor SLO2, which affects the mitochondrial electron transport chain, participates in multiple stress and hormone responses. MOLECULAR PLANT. 2014;7(2):290–310.
MLA
Zhu, Qiang, Jasper Dugardeyn, Chunyi Zhang, et al. “The Arabidopsis Thaliana RNA Editing Factor SLO2, Which Affects the Mitochondrial Electron Transport Chain, Participates in Multiple Stress and Hormone Responses.” MOLECULAR PLANT 7.2 (2014): 290–310. Print.
@article{4350067,
  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.},
  author       = {Zhu, Qiang and Dugardeyn, Jasper and Zhang, Chunyi and M{\"u}hlenbock, Per and Eastmond, Peter J and Valcke, Roland and De Coninck, Barbara and {\"O}den, Sevgi and Karampelias, Michail and Cammue, Bruno PA and Prinsen, Els and Van Der Straeten, Dominique},
  issn         = {1674-2052},
  journal      = {MOLECULAR PLANT},
  keyword      = {stress,ABSCISIC-ACID,SLO2,PLANT-PATHOGEN INTERACTIONS,NUCLEAR GENE-EXPRESSION,SIGNAL-TRANSDUCTION,COMPLEX-I,PENTATRICOPEPTIDE REPEAT PROTEIN,PPR PROTEIN,TRANSCRIPTION FACTOR,OXIDATIVE STRESS,DYW DOMAIN,PPR protein,RNA editing,mitochondria,plant stress,ethylene,Arabidopsis thaliana,ABA},
  language     = {eng},
  number       = {2},
  pages        = {290--310},
  title        = {The Arabidopsis thaliana RNA Editing Factor SLO2, which affects the mitochondrial electron transport chain, participates in multiple stress and hormone responses},
  url          = {http://dx.doi.org/10.1093/mp/sst102},
  volume       = {7},
  year         = {2014},
}

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