It may look like Audrey II from the 1986 film Little Shop of Horrors, but the green mouth opening and closing is a plant's response to changing carbon dioxide and humidity levels.Researchers at the University of San Diego captured a close-up look at a single stomata, a pore found in the epidermis of leaves, opening and closing in a movement that looks like breathing. Knowing that plants can signal their 'mouths' to respond to changing levels will allow scientists to and produce crops that withstand the effects of , said Jared Dashoff, a spokesperson with the National Science Foundation (NSF) that funded the work.
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