The source and lateral transport of growth inhibitors in geotropically stimulated roots of Zea mays and Pisum sativum

@article{Shaw1973TheSA,
  title={The source and lateral transport of growth inhibitors in geotropically stimulated roots of Zea mays and Pisum sativum},
  author={Stanley M Shaw and Malcolm B. Wilkins},
  journal={Planta},
  year={1973},
  volume={109},
  pages={11-26}
}
The positive geotropic responses of the primary roots of Zea mays and Pisum sativum seedlings depend upon at least one growth inhibiting factor which arises in the root cap and which moves basipetally through the apex into the extending zone. The root apex (as distinct from the cap) and the regions more basal to the extending zone are not sources of growth regulators directly involved in the geotropic response. A difference in the concentration or effectiveness of the inhibitory factor(s… CONTINUE READING
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