Monoterpenes Support Systemic Acquired Resistance within and between Plants

• 全文链接

单萜类化合物支持植物内部和植物之间的系统获得性抗性

关键词：

来源：

Plant Cell 期刊

全文链接：

//agri.nais.net.cn/topic/downloadFile/e1b6feec-9cc1-4b32-a5bf-a5921e01f0f7

来源地址：

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502447/pdf/PC_TPC201600898RAR2.pdf

资源所属：

茶学研究专题

类型：

学术文献

语种：

英语

原文发布日期：

2017-05-23

摘要：

This study investigates the role of volatile organic compounds in systemic acquired resistance (SAR), a salicylic acid (SA)-associated, broad-spectrum immune response in systemic, healthy tissues of locally infected plants. Gas chromatography coupled to mass spectrometry analyses of SAR-related emissions of wild-type and non-SAR-signal-producing mutant plants associated SAR with monoterpene emissions. Headspace exposure of Arabidopsis thaliana to a mixture of the bicyclic monoterpenes α-pinene and β-pinene induced defense, accumulation of reactive oxygen species, and expression of SA- and SAR-related genes, including the SAR regulatory AZELAIC ACID INDUCED1 (AZI1) gene and three of its paralogs. Pinene-induced resistance was dependent on SA biosynthesis and signaling and on AZI1 Arabidopsis geranylgeranyl reductase1 mutants with reduced monoterpene biosynthesis were SAR-defective but mounted normal local resistance and methyl salicylate-induced defense responses, suggesting that monoterpenes act in parallel with SA The volatile emissions from SAR signal-emitting plants induced defense in neighboring plants, and this was associated with the presence of α-pinene, β-pinene, and camphene in the emissions of the "sender" plants. Our data suggest that monoterpenes, particularly pinenes, promote SAR, acting through ROS and AZI1, and likely function as infochemicals in plant-to-plant signaling, thus allowing defense signal propagation between neighboring plants.