Partially redundant functions of two SET-domain polycomb-group proteins in controlling initiation of seed development in Arabidopsis

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In Arabidopsis, a complex of Polycomb-group (PcG) proteins functions in the female gametophyte to control the initiation of seed development. Mutations in the PcG genes, including MEDEA (MEA) and FERTILIZATION-INDEPENDENT SEED 2 (FIS2), produce autonomous seeds where endosperm proliferation occurs in the absence of fertilization. By using a yeast two-hybrid screen, we identified MEA and a related protein, SWINGER (SWN), as SET-domain partners of FIS2. Localization data indicated that all three proteins are present in the female gametophyte. Although single-mutant swn plants did not show any defects, swn mutations enhanced the mea mutant phenotype in producing autonomous seeds. Thus, MEA ... continued below

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13244-13249

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Wang, Dongfang; Tyson, Mark D.; Jackson, Shawn S. & Yadegari, Ramin August 29, 2006.

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In Arabidopsis, a complex of Polycomb-group (PcG) proteins functions in the female gametophyte to control the initiation of seed development. Mutations in the PcG genes, including MEDEA (MEA) and FERTILIZATION-INDEPENDENT SEED 2 (FIS2), produce autonomous seeds where endosperm proliferation occurs in the absence of fertilization. By using a yeast two-hybrid screen, we identified MEA and a related protein, SWINGER (SWN), as SET-domain partners of FIS2. Localization data indicated that all three proteins are present in the female gametophyte. Although single-mutant swn plants did not show any defects, swn mutations enhanced the mea mutant phenotype in producing autonomous seeds. Thus, MEA and SWN perform partially redundant functions in controlling the initiation of endosperm development before fertilization in Arabidopsis.

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13244-13249

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  • Journal Name: Proceedings of the National Academy of Sciences USA; Journal Volume: 103; Journal Issue: 35

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  • Report No.: DOE/ER/15438 Final Report
  • Grant Number: FG02-03ER15438
  • DOI: 10.1073/pnas.0605551103 | External Link
  • Office of Scientific & Technical Information Report Number: 1004563
  • Archival Resource Key: ark:/67531/metadc833195

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  • August 29, 2006

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 4:14 p.m.

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Wang, Dongfang; Tyson, Mark D.; Jackson, Shawn S. & Yadegari, Ramin. Partially redundant functions of two SET-domain polycomb-group proteins in controlling initiation of seed development in Arabidopsis, article, August 29, 2006; United States. (digital.library.unt.edu/ark:/67531/metadc833195/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.