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Genetics, Vol. 177, 2547-2551, December 2007, Copyright © 2007
doi:10.1534/genetics.107.082446

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Cell Cycle Arrest of Stamen Initials in Maize Sex Determination

Jong Cheol Kim*,{dagger}, Hélène Laparra*,1, Alejandro Calderón-Urrea*,2, John P. Mottinger{ddagger}, Maria A. Moreno* and Stephen L. Dellaporta*,3

* Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520-8104, {dagger} Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701, Korea and {ddagger} Department of Cell and Molecular Biology, University of Rhode Island, Kingston, Rhode Island 02881

3 Corresponding author: Yale University, Department of Molecular, Cellular and Developmental Biology, P.O. Box 208104, New Haven, CT 06520-8104.
E-mail: stephen.dellaporta{at}yale.edu

The maize sex determination pathway results in the arrest of stamen in ear spikelets and the abortion of pistils in both the tassel spikelets and in the secondary florets of ear spikelets. Arrested stamen cells showed no signs of DNA fragmentation, an absence of CYCLIN B expression, and an accumulation of the negative cell cycle regulator WEE1 RNA.






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Copyright © 2007 by the Genetics Society of America.