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Plant Sacrifices Cells to Fight Invaders Gene ensures programmed cell suicide does not go uncheckedResearchers recently discovered a gene essential to one of the plant kingdom's key immune responses--programmed cell death (PCD). Plants use PCD to create a protective zone of dead cells around the infection site to prevent the invading pathogen from spreading. But how the plants keep from killing themselves after they turn on the cell-suicide process was a mystery.
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