Journal Article

Sex-Specific Cell Division during Development of Unisexual Flowers in the Dioecious Plant <i>Silene latifolia</i>

Sachihiro Matsunaga, Wakana Uchida and Shigeyuki Kawano

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 45, issue 6, pages 795-802
Published in print June 2004 | ISSN: 0032-0781
Published online June 2004 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pch081
Sex-Specific Cell Division during Development of Unisexual Flowers in the Dioecious Plant Silene latifolia

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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We analyzed cell division patterns during the differentiation of unisexual flowers of the dioecious plant Silene latifolia using in situ hybridization with histone H4 and cyclin A1 genes. The gene expression patterns indicated that the activation of cell divisions in whorls 3 and 4 was reversed in young male and female flower buds. During maturation of flower buds, a remarkable reduction in cell division activity occurred in the male gynoecium primordium and female stamen primordia. Our analyses showed that differential activation and reduction of cell division strongly correlated with sex-specific promotion and cessation in the sex differentiation of unisexual flowers.

Keywords: Keywords: Cell division — Dioecious plant — Flower meristem — Sex chromosome — Sex development — Unisexual flower.

Journal Article.  5318 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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