Journal
PLANT SCIENCE
Volume 184, Issue -, Pages 75-82Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2011.12.013
Keywords
Brassica napus; Sclerotinia sclerotiorum; Salicylic acid; Jasmonic acid
Categories
Funding
- National Natural Science Foundation of China [31071672]
- China Postdoctoral Science Foundation [2011M500873]
- Natural Science Fund for Colleges and Universities in Jiangsu Province of China [10KJB210001]
- Jiangsu University [09JDG061, 10JDG021]
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Signaling pathways mediated by salicylic acid (SA) and jasmonic acid (JA) are widely studied in various host-pathogen interactions. For oilseed rape (Brassica napus)-Sclerotinia sclerotiorum interaction, little information of the two signaling molecules has been described in detail. In this study, we showed that the level of SA and JA in B. no pus leaves was increased with a distinct temporal profile, respectively, after S. sclerotiorum infection. The application of SA or methyl jasmonate enhanced the resistance to the pathogen. Furthermore, a set of SA and JA signaling marker genes were identified from B. napus and were used to monitor the signaling responses to S. sclerotiorum infection by examining the temporal expression profiles of these marker genes. The SA signaling was activated within 12 h post inoculation (hpi) followed by the JA signaling which was activated around 24 hpi. In addition, SA-JA crosstalk genes were activated during this process. These results suggested that defense against S. sclerotiorum in oilseed rape is associated with a sequential activation of SA signaling and JA signaling, which provide important clues for designing strategies to curb diseases caused by S. sclerotioru. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
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