To see what other scientists thought of this petunia, I emailed Simon Gilroy, a botanist who leads a lab at the University of Wisconsin at Madison that uses green fluorescent proteins to study how a plant sends signals through its body. But the fluorescence of those proteins—originally synthesized from a jellyfish—is visible only with specialized lights, unlike the petunia now in my house, which glowed on its own. When I visited Gilroy’s lab in 2022, he showed me a tiny plant beneath a microscope lens, handed me a pair of tweezers, and instructed me to pinch it. I watched as a green luminance moved through the entire plant body: The experience permanently changed my view of plant life. Here was a lively, dynamic creature that absolutely knew I was touching it. Gilroy quickly wrote back: “I actually have 2 of those luminescent petunias on pre-order.”
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