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Science. 1997 Jul 4;277(5322):91-4.

Cellular differentiation regulated by gibberellin in the Arabidopsis thaliana pickle mutant.

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  • 1Department of Plant Biology, Carnegie Institution of Washington, 290 Panama Street, Stanford, CA 94305, USA. jogas@andrew.stanford.edu


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.

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