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Plants bend their roots away from decaying plants
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Plants bend their roots away from decaying plants

So, plants may look rooted in place, but their roots can steer away from decaying plant matter in a newly identified movement researchers call saprotropism. After noticing roots bending away from a contaminated lab plate, Yuzhou Zhang’s team tested the response with rotting apple and found it in Arabidopsis, tomatoes and wheat, but not around decaying animal tissue. The researchers link the behavior to acidic chemical gradients from decomposing plants: abscisic acid builds up on the side facing the decay, prompting growth in the opposite direction. This could help plants avoid pathogens and offers an intriguing new window into how they sense their surroundings, though the signaling details still need further study.
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