How light-farming chloroplasts morph into defensive warriors
Scientists have identified the protein that summons the cellular energy factories to battle

CALL TO ARMS When attacked by a funguslike microbe (magenta), plants activate a protein that marshals chloroplasts (yellow) as a defensive army. This 3-D visualization of the onslaught also shows chloroplasts’ stromules, armlike extensions that embrace an invader.
A. Toufexi et al/bioRxiv.org 2019