Most of us rarely think about plant immunity. But, like us, plants can distinguish between different pathogens, trigger a ‘bespoke’ immune response and retain a memory of past infections to boost future immunity. However, plant immune systems also exhibit enviable features like the ability to inherit immunological memory from a parent, or to warn distant individuals of an impending pathogen attack. This lecture investigates how they do all of this and more without a single white blood cell.

Gresham College