Green leaf volatile sensory calcium transduction in Arabidopsis

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 plan...

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Bibliographic Details
Published in:Nature communications 2023-10, Vol.14 (1), p.6236-6236, Article 6236
Main Authors: Aratani, Yuri, Uemura, Takuya, Hagihara, Takuma, Matsui, Kenji, Toyota, Masatsugu
Format: Article
Language:English
Subjects:
13/95
14/19
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38/39
631/449/1736
631/449/2675
631/80/86/1999
Allelochemicals
Arabidopsis
Calcium compounds
Calcium imaging
Calcium ions
Calcium signalling
Environmental impact
Guard cells
Hex-3-enal
Humanities and Social Sciences
Image resolution
Leaves
Mesophyll
multidisciplinary
Organic compounds
Plants
Science
Science (multidisciplinary)
Sensory transduction
Signal transduction
Stomata
VOCs
Volatile compounds
Volatile organic compounds
Volatiles
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Summary: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 Ca 2+ concentration ([Ca 2+ ] 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 [Ca 2+ ] cyt in Arabidopsis . These volatiles trigger the expression of biotic and abiotic stress-responsive genes in a Ca 2+ -dependent manner. Tissue-specific high-resolution Ca 2+ imaging and stomatal mutant analysis reveal that [Ca 2+ ] 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 [Ca 2+ ] cyt increases and subsequent defense responses in Arabidopsis leaves. Plants sense volatiles emitted by injured neighboring plants and elicit defense responses to external threats. Here, the authors show that Arabidopsis leaves uptake two green leaf volatiles via stomata and trigger cytosolic Ca 2+ defense signaling.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-41589-9