A molecular link between stem cell regulation and floral patterning in Arabidopsis.

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OAK-B135 The homeotic gene AGAMOUS (AG) has dual roles in specifying floral organ fate and limiting stem cell proliferation in Arabidopsis flowers. We show here that the floral identity protein LEAFY (LFY), a transcription factor expressed throughout the flower, acts together with the homeodomain protein WUSCHEL (WUS) to activate AG in the center of flowers. WUS was previously identified because of its role in maintaining a stem cell population in the center of both shoot and floral meristems. The unsuspected additional role of WUS in regulating floral homeotic gene expression supports the hypothesis that floral patterning makes use of a ... continued below

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Lohmann, J. U., Hong, R. L., Hobe, M., Busch, M. A., Parcy, F., Simon, R., and Weigel, D. June 15, 2001.

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OAK-B135 The homeotic gene AGAMOUS (AG) has dual roles in specifying floral organ fate and limiting stem cell proliferation in Arabidopsis flowers. We show here that the floral identity protein LEAFY (LFY), a transcription factor expressed throughout the flower, acts together with the homeodomain protein WUSCHEL (WUS) to activate AG in the center of flowers. WUS was previously identified because of its role in maintaining a stem cell population in the center of both shoot and floral meristems. The unsuspected additional role of WUS in regulating floral homeotic gene expression supports the hypothesis that floral patterning makes use of a general meristem patterning system that was present before flowers evolved. We also show that AG represses WUS at later stages of floral development, thus creating a negative feedback loop that is required for the determinate growth of floral meristems.

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OSTI as DE00821977

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  • Journal Name: Cell; Journal Volume: 105; Other Information: Submitted to Cell, Volume 105, Pages 793-803

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  • Report No.: DOE-ER20317-4
  • Grant Number: FG03-98ER20317
  • Office of Scientific & Technical Information Report Number: 821977
  • Archival Resource Key: ark:/67531/metadc779593

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  • June 15, 2001

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  • Dec. 3, 2015, 9:30 a.m.

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  • Aug. 5, 2016, 3:33 p.m.

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Lohmann, J. U., Hong, R. L., Hobe, M., Busch, M. A., Parcy, F., Simon, R., and Weigel, D. A molecular link between stem cell regulation and floral patterning in Arabidopsis., article, June 15, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc779593/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.