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Scientists have long known that chloroplasts help plants turn the sun’s energy into food, but a new study, led by plant biologists, shows that they are also essential for plant immunity to viral and bacterial pathogens.

Plants employ plasmodesmata for cell communication, but protein targeting to these structures is poorly understood. Studying PDLP5 and related proteins, researchers discovered unconventional targeting signals in their extracellular regions, crucial for regulating viral movement. New study aims to uncover the…