Experiments: basic research on living systems, not technology.
Also: plant nerves, wound signalling
Plants have no nerves, but a wounded leaf sends fast electrical and calcium signals that warn the rest of the plant.
Only what the cited papers report.
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Mousavi and colleagues mapped electrical changes that spread from a wounded leaf to others, and found glutamate-receptor-like genes are needed for them.
As reported in: Mousavi, Chauvin, Pascaud et al. (2013). GLUTAMATE RECEPTOR-LIKE genes mediate leaf-to-leaf wound signalling. Nature. doi:10.1038/nature12478
Toyota and colleagues showed wounding releases glutamate, which sets off a fast calcium wave that reaches distant leaves within minutes and triggers defences.
As reported in: Toyota, Spencer, Sawai-Toyota et al. (2018). Glutamate triggers long-distance, calcium-based plant defense signaling. Science. doi:10.1126/science.aat7744
Abstract only