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Outer root layer controls twisted root growth (Level A1) — A close up of a plant on a hill

Outer root layer controls twisted root growthCEFR A1

26 Dec 2025

Adapted from Washington U. in St. Louis, Futurity CC BY 4.0

Photo by Wolfgang Hasselmann, Unsplash

Level A1 – Beginner
2 min
84 words
  • Many plants often show twisted, corkscrew root growth.
  • Root twisting helps plants move around stones in soil.
  • Scientists asked how roots twist in nature.
  • They used a small model plant system in the lab.
  • Researchers put a normal gene into different layers of the root.
  • When inner layers had the gene, roots stayed twisted.
  • When only the outer layer had the gene, roots grew straight.
  • The outer root layer controls the whole organ shape.
  • This finding could help crops in rocky soil and drought.

Difficult words

  • corkscrewtwisted shape like a spiral
  • layerone thickness or level of material
    layers
  • genesmall part of a cell that gives traits
  • controlhave power over how something grows
    controls
  • organa plant or animal part with a function
  • droughta long time without enough rain

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Have you seen plants with twisted roots?
  • Do you know plants that grow in rocky soil?
  • Have you seen plants in dry places with little rain?

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