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Trees use opposing wood “muscles” to straighten themselves

Trees can sense their own posture, but scientists had not fully understood how that awareness changes their growth. To isolate this internal sense, researchers grew young poplars on a rotating platform in evenly distributed light, removing reliable cues from gravity and sunlight. They found that as stems straightened, tension wood stopped forming on one side and appeared on the opposite side, creating opposing pulling forces like paired muscles. So: trees use this flexible wood system to correct their shape, revealing a surprisingly coordinated way plants control their posture.
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