Green leaf volatile sensory calcium transduction in Arabidopsis

• 全文链接

拟南芥绿叶挥发物感知钙转导

关键词：

来源：

Nature Communications 期刊

全文链接：

//agri.nais.net.cn/topic/downloadFile/8902ef85-4b50-40ca-901c-8aea126f5ed3

来源地址：

https://www.nature.com/articles/s41467-023-41589-9

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：

2023-10-17

摘要：

Plants perceive volatile organic compounds (VOCs) released by mechanically- or herbivore-damaged neighboring plants and induce various defense responses. Such interplant communication protects plants from environmental threats. However, the spatiotemporal dynamics of VOC sensory transduction in plants remain largely unknown. Using a wide-field real-time imaging method, we visualize an increase in cytosolic Ca2+ concentration ([Ca2+]cyt) in Arabidopsis leaves following exposure to VOCs emitted by injured plants. We identify two green leaf volatiles (GLVs), (Z)-3-hexenal (Z-3-HAL) and (E)-2-hexenal (E-2-HAL), which increase [Ca2+]cyt in Arabidopsis. These volatiles trigger the expression of biotic and abiotic stress-responsive genes in a Ca2+-dependent manner. Tissue-specific high-resolution Ca2+ imaging and stomatal mutant analysis reveal that [Ca2+]cyt increases instantly in guard cells and subsequently in mesophyll cells upon Z-3-HAL exposure. These results suggest that GLVs in the atmosphere are rapidly taken up by the inner tissues via stomata, leading to [Ca2+]cyt increases and subsequent defense responses in Arabidopsis leaves.