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Science 4 July 1997:
Vol. 277. no. 5322, pp. 91 - 94
DOI: 10.1126/science.277.5322.91
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Reports

Cellular Differentiation Regulated by Gibberellin in the Arabidopsis thaliana pickle Mutant

Joe Ogas, * Jin-Chen Cheng, Z. Renee Sung, Chris Somerville

The plant growth regulator gibberellin (GA) has a profound effect on shoot development and promotes developmental transitions such as flowering. Little is known about any analogous effect GA might have on root development. In a screen for mutants, Arabidopsis plants carrying a mutation designated pickle (pkl) were isolated in which the primary root meristem retained characteristics of embryonic tissue. Expression of this aberrant differentiation state was suppressed by GA. Root tissue from plants carrying the pkl mutation spontaneously regenerated new embryos and plants.

J. Ogas and C. Somerville, Department of Plant Biology, Carnegie Institution of Washington, 290 Panama Street, Stanford, CA 94305, USA.
J.-C. Cheng and Z. R. Sung, Department of Plant Biology, University of California, Berkeley, CA 94720-3102, USA.
*   To whom correspondence should be addressed. E-mail: jogas{at}andrew.stanford.edu

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