Contact: Jade Boyd
Caption: Plant growth is affected by touch. Arabidopsis plants that were touched several times each day (right) grew shorter stems than those that were untouched (left). Rice University biologists found that this growth response is controlled by a plant hormone that protects plants from insects and fungal infections.
Credit: Wassim Chehab/Rice University
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Related news release: A bit touchy: Plants' insect defenses activated by touch