Regulation of leaf initiation by the terminal ear 1 gene of maize

Bruce Veit, Steven P. Briggs, Robert J. Schmidt, Martin F. Yanofsky and Sarah Hake
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Bruce Veit: Institute of Molecular Biosciences, Massey University
Steven P. Briggs: Pioneer Hi-Bred, International Inc.
Robert J. Schmidt: University of California
Martin F. Yanofsky: University of California
Sarah Hake: Plant Gene Expression Center, USDA/UC Berkeley

Nature, 1998, vol. 393, issue 6681, 166-168

Abstract: Abstract Higher plants elaborate much of their architecture post-embryonically through development initiated at the tips of shoots1,2. During vegetative growth, leaf primordia arise at predictable sites to give characteristic leaf arrangements, or phyllotaxies3,4. How these sites are determined is a long-standing question5,6 that bears on the nature of pattern-formation mechanisms in plants. Fate-mapping studies in several species indicate that each leaf primordium becomes organized from a group of 100–200 cells on the flank of the shoot apex7. Although molecular studies indicate that the regulated expression of specific homeobox genes plays some part in this determination process8,9,10,11, mechanisms that regulate the timing and position of leaf initiation are less well understood. Here we describe a gene from maize, terminal ear 1. Patterns of expression of this gene in the shoot and phenotypes of mutants indicate a role for terminal ear 1 in regulating leaf initiation. The te1 gene product contains conserved RNA-binding motifs, indicating that it may function through an RNA-binding activity.

Date: 1998
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DOI: 10.1038/30239

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