Temperature-related effects of treatments with jasmonic and salicylic acids on Arabidopsis infected with cucumber mosaic virus

Temperature-related effects of treatments with jasmonic and salicylic acids on Arabidopsis... Plant-virus interactions are affected by environmental factors, including temperature. Plant defenses are often inhibited by high or low temperature. In this study, oxidative damage and gene expression were detected in Arabidopsis thaliana infected with cucumber mosaic virus (CMV) at different temperatures. Before virus inoculation, plants were treated with jasmonic acid (JA) and salicylic acid (SA), both of which are important signaling molecules in plant defense responses. The levels of MDA and hydrogen peroxide (H2O2), and electrolyte leakage were significantly higher in CMV-infected leaves at 15 and 37°C. The accumulation of H2O2 and superoxide radical (O 2 ·− ) was obviously suppressed by spraying with JA followed by SA (JA → SA) at different temperatures. The CMV-CP expression analysis showed that virus replication was inhibited efficiently in the (JA → SA) treatment. Therefore, many JA- and SA-responsible resistance genes were quantified; MPK4 was expressed highly and steadily in the (JA → SA) treatment. To further confirm the role of MPK4, the CMV-CP gene expression was evaluated in wild-type Arabidopsis and its mpk4 mutant infected with CMV. The results suggested that MPK4 might play an important role in the antagonism between JA and SA at temperature fluctuation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Temperature-related effects of treatments with jasmonic and salicylic acids on Arabidopsis infected with cucumber mosaic virus

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Springer US
Copyright © 2013 by Pleiades Publishing, Ltd.
Life Sciences; Plant Physiology; Plant Sciences
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