1. Volatile communication in plants relies on a KAI2-mediated signaling pathway.
- Author
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Stirling, Shannon A., Guercio, Angelica M., Patrick, Ryan M., Xing-Qi Huang, Bergman, Matthew E., Dwivedi, Varun, Kortbeek, Ruy W. J., Yi-Kai Liu, Fuai Sun, Tao, W. Andy, Ying Li, Boachon, Benoît, Shabek, Nitzan, and Dudareva, Natalia
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CELLULAR signal transduction , *MORPHOGENESIS , *PLANT-microbe relationships , *VOLATILE organic compounds , *GENITALIA - Abstract
Plants are constantly exposed to volatile organic compounds (VOCs) that are released during plant-plant communication, within-plant self-signaling, and plant-microbe interactions. Therefore, understanding VOC perception and downstream signaling is vital for unraveling the mechanisms behind information exchange in plants, which remain largely unexplored. Using the hormone-like function of volatile terpenoids in reproductive organ development as a system with a visual marker for communication, we demonstrate that a petunia karrikin-insensitive receptor, PhKAI2ia, stereospecifically perceives the (−)-germacrene D signal, triggering a KAI2-mediated signaling cascade and affecting plant fitness. This study uncovers the role(s) of the intermediate clade of KAI2 receptors, illuminates the involvement of a KAI2ia-dependent signaling pathway in volatile communication, and provides new insights into plant olfaction and the long-standing question about the nature of potential endogenous KAI2 ligand(s). [ABSTRACT FROM AUTHOR]
- Published
- 2024
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