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Published July 1, 1994 | Published
Journal Article Open

Function and regulation of the Arabidopsis floral homeotic gene PISTILLATA


Mutations in the PISTILLATA (PI) gene of Arabidopsis thaliana cause homeotic conversion of petals to sepals and of stamens to carpels. It is thus classed as a B function floral homeotic gene and acts together with the product of the other known B function gene, APETALA3 (AP3). We have cloned PI and determined the time and places of its expression in developing flowers. Surprisingly, the initial patterns of PI and AP3 expression are different. By positive regulatory interactions between PI and AP3, later expression patterns are coincident or nearly coincident. The pattern of PI expression also depends on the activity of the floral development genes APETALA2 and SUPERMAN and on the activity of PI itself. The PI and APETALA3 proteins specifically associate in solution and so may act together in regulating PI and other genes.

Additional Information

© 1994 Cold Spring Harbor Laboratory Press. The Authors acknowledge that six months after the full-issue publication date, the Article will be distributed under a Creative Commons CC-BY-NC License (Attribution-NonCommercial 4.0 International License, http://creativecommons.org/licenses/by-nc/4.0/). Received March 8, 1994; revised version accepted May 12, 1994. We thank the members of our laboratory for reading and suggesting changes to the manuscript, and S. Schwarz-Sommer for communicating the amino acid sequence of the GLOB gene prior to its publication. K.G. was a Human Frontier Science Program postdoctoral fellow. This work was funded by grant MCB-9204839 from the U.S. National Science Foundation. The nucleotide sequence data described in this paper have been submitted to the GSDB, DDBJ, EMBL, and NCBI data bases under accession number D30807. The publication costs of this article were defrayed in part by payment of page charges. This article must therefore be hereby marked "advertisement" in accordance with 18 USC section 1734 solely to indicate this fact.

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August 22, 2023
August 22, 2023