Evidence for different signaling pathways activated by inducers of acquired resistance in wheat
Evidence for different signaling pathways activated by inducers of acquired resistance in wheat
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DOI：
10.1094/mpmi.1997.10.6.779
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发表时间：
1997-08-01
影响因子：
3.5
通讯作者：
Dudler, R
中科院分区：
文献类型：
--
作者：
Schaffrath, U;Freydl, E;Dudler, R
小麦对白粉病的获得性抗性(AR)小麦可以通过接种非寄主病原菌E.graminis F.sp.hordei或用苯并(1，2，3)噻二唑-7-硫代甲酸酯(BTH)等化学物质处理来诱导。在双子叶植物烟草和拟南芥中，病原菌和BTH诱导AR伴随着一组特征基因的表达。在小麦中，BTH处理不能激活那些在非寄主病原菌诱导AR后积累的基因，而BTH诱导的基因不能被适当的病原菌接种激活。这表明在单子叶植物中至少存在两种不同的AR诱导途径。
Acquired resistance (AR) of wheat (Triticum aestivum) to the powdery mildew fungus Erysiphe graminis f. sp. tritici can be induced either by inoculation with the nonhost pathogen E. graminis f. sp, hordei or by treatment with chemical substances such as benzo(1,2,3)thiodiazole-7-carbothioic acid S-methyl ester (BTH). In the dicotyledonous plants tobacco and Arabidopsis, induction of AR by pathogens and BTH is accompanied by the expression of a characteristic set of genes. Here we report that in wheat, BTH treatment failed to activate genes whose transcripts accumulate after AR induction by nonhost pathogens, whereas BTH-inducible genes were not activated by an appropriate pathogen inoculation. This suggests that at least two different pathways exist for the induction of AR in monocots.