Bacterial chemoattraction towards jasmonate plays a role in the entry of Dickeya dadantii through wounded tissues
Bacterial chemoattraction towards jasmonate plays a role in the entry of Dickeya dadantii through wounded tissues
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DOI：
10.1111/j.1365-2958.2009.06888.x
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发表时间：
2009-11-01
影响因子：
3.6
通讯作者：
Rodriguez-Palenzuela, Pablo
中科院分区：
文献类型：
--
作者：
Antunez-Lamas, Maria;Cabrera, Ezequiel;Rodriguez-Palenzuela, Pablo
茉莉酸是植物防御中的一种关键信号化合物，在受伤的组织中合成.在这项工作中，我们已经发现，这种分子也是一个强大的化学引诱剂的phythopathogenic细菌Dickeya dadantii（前欧文氏菌chysophii）。茉莉酸诱导表达的细菌基因的子集可能参与在植物质外体和细菌细胞的毒性/生存与茉莉酸预处理表现出增加的毒性在菊苣和圣保罗叶。我们还表明，组织损伤诱导细菌通过叶片表面传播。此外，茉莉酸缺失的aos 1拟南芥突变体对细菌入侵的抗性更强。dadantii比野生型植物。这些结果与该细菌感知茉莉酸有助于病原体侵入植物组织的假设一致。
P>Jasmonate is a key signalling compound in plant defence that is synthesized in wounded tissues. In this work, we have found that this molecule is also a strong chemoattractant for the phythopathogenic bacteria Dickeya dadantii (ex-Erwinia chysanthemi). Jasmonic acid induced the expression of a subset of bacterial genes possibly involved in virulence/survival in the plant apoplast and bacterial cells pre-treated with jasmonate showed increased virulence in chicory and Saintpaulia leaves. We also showed that tissue wounding induced bacterial spread through the leaf surface. Moreover, the jasmonate-deficient aos1 Arabidopsis thaliana mutant was more resistant to bacterial invasion by D. dadantii than wild-type plants. These results are consistent with the hypothesis that sensing jasmonic acid by this bacterium helps the pathogen to ingress inside plant tissues.