Plant and Cell Physiology Supplement
Abstract of the Annual Meeting of JSPP 2011
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Gene expression of Arabidopsis plants in response to allelochemicals of Spiraea thunbergii (Rosaceae)
*Naoya WasanoMami SuganoAnna GoliszHiroshi AbeYoshiharu Fujii
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Pages 0799

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Abstract
Spiraea thunbergii (Rosaceae) allelochemicals, cis-cinnamonyl acid (cis-CA), had high growth-inhibitory activity against several plants. To elucidate the mechanism of growth-inhibitory activity of cis-CA, gene expression of Arabidopsis thaliana was analyzed by using DNA microarrays. After 6-h exposure, the expression of 75 genes was significantly up-regulated, and that of 116 genes was significantly down-regulated. The up-regulated genes mainly consisted of pathogenesis-related genes, and the down-regulated genes consisted of jasmonic acid/ethylene-responsive genes, superoxide dismutase genes encoding defensive enzymes against reactive oxygen species, the genes expressed specific to cell walls essential for cell-enlargement process, and a transcription factor up-regulated in response to environmental stresses. Based on these results, cis-CA acted mainly in two mechanisms: an influence on plant defense systems against environmental stresses and deregulation of cell wall-associated genes involved in cell elongations.
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© 2011 by The Japanese Society of Plant Physiologists
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