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

A - Papers appearing in refereed journals

Zhu, Q., Dugardeyn, J., Zhang, C., Muhlenbock, P., Eastmond, P. J., Valcke, R., De Coninck, B., Oden, S., Karampelias, M., Cammue, B. P. A., Prinsen, E. and Van Der Straeten, D. 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), pp. 290-310.

AuthorsZhu, Q., Dugardeyn, J., Zhang, C., Muhlenbock, P., Eastmond, P. J., Valcke, R., De Coninck, B., Oden, S., Karampelias, M., Cammue, B. P. A., Prinsen, E. and Van Der Straeten, D.
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. 

Year of Publication2014
JournalMolecular Plant
Journal citation7 (2), pp. 290-310
Digital Object Identifier (DOI)doi:10.1093/mp/sst102
Open accessPublished as non-open access
Funder project or codeDesigning Seeds for Nutrition and Health (DS)
Designing oilseeds for nutrition and health
Publication dates
Online05 Jan 2015
Publication process dates
Accepted28 May 2013
PublisherElsevier
Cell Press
ISSN1674-2052

Permalink - https://repository.rothamsted.ac.uk/item/8qy52/the-arabidopsis-thaliana-rna-editing-factor-slo2-which-affects-the-mitochondrial-electron-transport-chain-participates-in-multiple-stress-and-hormone-responses

Restricted files

Publisher's version

Under embargo indefinitely

11 total views
1 total downloads
2 views this month
0 downloads this month