Paloma Gonzalez Bellido, an MBL Whitman Center Scientist and collaborator with Senior Scientist Roger Hanlon, comments on this study.
By Katherine J. Wu
Octopuses can taste what their arms touch, and scientists have figured out how.
Should anything ever compel you to lick an octopus’s arm, keep this in mind: That arm has all the cellular machinery to taste your tongue right back.
Scientists have known for years that octopuses can taste what their arms touch. Now, a team of Harvard biologists armed with bricks, Velcro and an array of genetic tools has cracked some of the code behind this feel-and-feed feat.
The cells of octopus suckers are decorated with a mixture of tiny detector proteins. Each type of sensor responds to a distinct chemical cue, giving the animals an extraordinarily refined palate that can inform how their agile arms react, jettisoning an object as useless or dangerous, or nabbing it for a snack.
The study, published Thursday in the journal Cell, “really nails the molecular basis for a new sensory system,” said Rebecca Tarvin, a biologist at the University of California, Berkeley, who wrote a commentary on the findings but was not involved in the research. “This was previously kind of a black box.”
Though humans have nothing quite comparable in their anatomy, being an octopus might be roughly akin to exploring the world with eight giant, sucker-studded tongues, said Lena van Giesen, the study’s lead author. “Or maybe it feels totally different,” she said. “We just don’t know.” Read more …