Abstract
Salicylic acid is a messenger molecule in the activation of defense responses in plants. In this study, we isolated four cDNA clones representing salicylic acid-induced genes in Chinese cabbage (Brassica rapa subsp. pekinensis) by subtractive hybridization. Of the four clones, the BC5-2 clone encodes a putative glucosyltransferase protein. The BC5-3 clone is highly similar to an Arabidopsis gene encoding a putative metal-binding farnesylated protein. The BC6-1 clone is a chitinase gene with similarities to a rapeseed class IV chitinase. Class IV chitinases have deletions in the chitin-binding and catalytic domains and the BC6-1 chitinase has an additional deletion in the catalytic domain. The BCP8-1 clone is most homologous to an Arabidopsis gene that contains a tandem array of two thiJ-like sequences. These four cabbage genes were barely expressed in healthy leaves, but were strongly induced by salicylic acid and benzothiadiazole. Expression of the three genes represented by the BC5-2, BC5-3 and BCP8-1 clones were also induced by Pseudomonas syringae pv. tomato, a nonhost pathogen that elicits a hypersensitive response in Chinese cabbage. None of these four genes, however, was strongly induced by methyl jasmonate or by ethylene.
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Abbreviations
- BTH :
-
Benzothiadiazole
- DIG :
-
Digoxigenin
- GAPD :
-
Glyceraldehyde 3-phosphate dehydrogenase
- HMP :
-
Hydroxymethylpyrimidine
- HR :
-
Hypersensitive response
- Me-JA :
-
Methyl jasmonate
- Pst :
-
Pseudomonas syringae pv. tomato
- SAR :
-
Systemic acquired resistance
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Acknowledgements
This work was supported by a grant from the Technology Development Program of the Ministry of Agriculture and Forestry, Republic of Korea (grant no. 299045-3).
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Communicated by I.S. Chung
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Park, YS., Min, HJ., Ryang, SH. et al. Characterization of salicylic acid-induced genes in Chinese cabbage. Plant Cell Rep 21, 1027–1034 (2003). https://doi.org/10.1007/s00299-003-0606-9
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DOI: https://doi.org/10.1007/s00299-003-0606-9