Cellular Differentiation Regulated by Gibberellin in the Arabidopsis thaliana pickle Mutant

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Science  04 Jul 1997:
Vol. 277, Issue 5322, pp. 91-94
DOI: 10.1126/science.277.5322.91

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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, Arabidopsisplants 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.

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