Abstract.
We have developed image analysis software linked to a rotating stage, allowing constraint of any user-selected region of a root at a prescribed angle during root gravitropism. This device allows the cap of a graviresponding root to reach vertical while maintaining a selected region within the elongation zone at a gravistimulated angle. Under these conditions gravitropic curvature of roots of Zea mays L. continues long after the root cap reaches vertical, indicating that a signal from outside of the cap can contribute to the curvature response.
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Wolverton, C., Mullen, J.L., Ishikawa, H. et al. Root gravitropism in response to a signal originating outside of the cap. Planta 215, 153–157 (2002). https://doi.org/10.1007/s00425-001-0726-9
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DOI: https://doi.org/10.1007/s00425-001-0726-9