The Arabidopsis plant on the left received a priming treatment before infection with bacteria and shows no sign of disease. The plant on the right is an untreated control plant. BRIGITTE MAUCH-MANI
After plants acquire resistance to pests and pathogens, their offspring shoot up through the soil with better defenses. The findings, published in a recent series of papers in Plant Physiology, are the first to identify small interfering RNAs (siRNAs) as a possible mechanism of this inherited memory response, and suggest a new strategy for managing crop pests.
“It’s sort of like giving a vaccine to the parent and seeing immunity in the child,” said Andrei Alyokhin, who studies insect-plant interactions at the University of Maine and was not involved in the research. “It could help with the pest problem—induced resistance in plants is an extremely underutilized approach.”
Plants eventually come to know their enemies. When a caterpillar first bites into a juicy leaf, plant cells ...
