Plants engineered to always be on alert don’t grow well

Scientists bred a weed to lack proteins that help stem production of insect-repelling chemicals

thale cress

FIGHT OR SLIGHT  In lab tests, a plant called thale cress (shown) that was engineered to be nearly always on alert for leaf-eating predators tended to be smaller and produced fewer viable seeds than its normal kin.

Robert Vidéki, Doronicum Kft./ (CC BY-NC 3.0 US)

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