This Article Full Text Full Text (PDF) Supplemental Data All Versions of this Article: 20/3/635    most recent tpc.107.055137v1 Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Kang, I.-H. Articles by Drews, G. N. Search for Related Content PubMed PubMed Citation Articles by Kang, I.-H. Articles by Drews, G. N. Agricola Articles by Kang, I.-H. Articles by Drews, G. N.

The AGL62 MADS Domain Protein Regulates Cellularization during Endosperm Development in Arabidopsis^[W]

Department of Biology, University of Utah, Salt Lake City, Utah 84112-0840

⁴ Address correspondence to drews{at}bioscience.utah.edu.

Endosperm, a storage tissue in the angiosperm seed, provides nutrients to the embryo during seed development and/or to the developing seedling during germination. A major event in endosperm development is the transition between the syncytial phase, during which the endosperm nuclei undergo many rounds of mitosis without cytokinesis, and the cellularized phase, during which cell walls form around the endosperm nuclei. The molecular processes controlling this phase transition are not understood. In agl62 seeds, the endosperm cellularizes prematurely, indicating that AGL62 is required for suppression of cellularization during the syncytial phase. AGL62 encodes a Type I MADS domain protein that likely functions as a transcription factor. During seed development, AGL62 is expressed exclusively in the endosperm. During wild-type endosperm development, AGL62 expression is strong during the syncytial phase and then declines abruptly just before cellularization. By contrast, in mutant seeds containing defects in some FERTILIZATION-INDEPENDENT SEED (FIS) class Polycomb group genes, the endosperm fails to cellularize and AGL62 expression fails to decline. Together, these data suggest that AGL62 suppresses cellularization during the syncytial phase of endosperm development and that endosperm cellularization is triggered via direct or indirect AGL62 inactivation by the FIS polycomb complex.

This article has been cited by other articles:

				J. G. Steffen, I.-H. Kang, M. F. Portereiko, A. Lloyd, and G. N. Drews AGL61 Interacts with AGL80 and Is Required for Central Cell Development in Arabidopsis Plant Physiology, September 1, 2008; 148(1): 259 - 268. [Abstract] [Full Text] [PDF]

				M. Bemer, M. Wolters-Arts, U. Grossniklaus, and G. C. Angenent The MADS Domain Protein DIANA Acts Together with AGAMOUS-LIKE80 to Specify the Central Cell in Arabidopsis Ovules PLANT CELL, August 1, 2008; 20(8): 2088 - 2101. [Abstract] [Full Text] [PDF]