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Role of SUPERMAN in maintaining Arabidopsis floral whorl boundaries

Sakai, Hajime and Medrano, Leonard J. and Meyerowitz, Elliot M. (1995) Role of SUPERMAN in maintaining Arabidopsis floral whorl boundaries. Nature, 378 (6553). pp. 199-203. ISSN 0028-0836. doi:10.1038/378199a0.

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The Arabidopsis gene SUPERMAN (SUP) is necessary for the proper spatial development of reproductive floral tissues1–3. Recessive mutations cause extra stamens to form interior to the normal third whorl stamens, at the expense of fourth whorl carpel development. The mutant phenotype is associated with the ectopic expression of the B function genes, AP3 and PI, in the altered floral region, closer to the centre of the flower than in the wild type, and ap3 sup and pi sup double mutants exhibit a phenotype similar to ap3 and pi single mutants. These findings led to SUP being interpreted as an upstream negative regulator of the B function organ-identity genes, acting in the fourth whorl, to establish a boundary between stamen and carpel whorls. Here we show, using molecular cloning and analysis, that it is expressed in the third whorl and acts to maintain this boundary in developing flowers. The putative SUPERMAN protein contains one zinc-finger and a region resembling a basic leucine zipper motif, suggesting a function in transcriptional regulation.

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Meyerowitz, Elliot M.0000-0003-4798-5153
Additional Information:© 1995 Nature Publishing Group. Received 8 June; accepted 18 September 1995. We thank X. Chen, J. Fletcher. J. Hua, S. Jacobsen. B. Krizek, J. Levin, J L. Riechmann, M. Running. R. Sablowski, D. Smyth. T. Tubman, B. Williams and Z. Liu for discussion and critical reviews of the manuscript, and E. Koh for technical assistance. We thank the Arabidopsis Biological Resource Center at Ohio State University for axrl-2 seeds. The nucleotide sequence data will appear under accession number U38946. H.S. was supported by a long-term fellowship from the Human Frontier Science Program. This work was supported by a US National Science Foundation grant to E.M.M.
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Human Frontier Science ProgramUNSPECIFIED
Issue or Number:6553
Record Number:CaltechAUTHORS:20150605-124804146
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ID Code:58047
Deposited By: Tony Diaz
Deposited On:05 Jun 2015 19:54
Last Modified:10 Nov 2021 21:58

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