Tiny channels between plant cells respond to wound alerts through hydrogen peroxide bursts

When a person falls and gets a cut or a scrape, they often use hydrogen peroxide to clean the wound. This molecular compound is also produced within our cells, helping our immune system build its defenses against harmful bacteria or other pathogens. Hydrogen peroxide is produced inside plants, too, where it acts as a messenger, telling cells to beef up a plant's defenses when it is stressed, wounded or under attack.

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