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- W2395585525 abstract "In angiosperms, seed architecture is shaped by the coordinated development of three genetically different components: embryo, endosperm, and maternal tissues. The relative contribution of these tissues to seed mass and nutrient storage varies considerably among species. The development of embryo, endosperm, or nucellus maternal tissue as primary storage compartments defines three main typologies of seed architecture. It is still debated whether the ancestral angiosperm seed accumulated nutrients in the endosperm or the nucellus. During evolution, plants shifted repeatedly between these two storage strategies through molecular mechanisms that are largely unknown. Here, we characterize the regulatory pathway underlying nucellus and endosperm tissue partitioning in Arabidopsis thaliana We show that Polycomb-group proteins repress nucellus degeneration before fertilization. A signal initiated in the endosperm by the AGAMOUS-LIKE62 MADS box transcription factor relieves this Polycomb-mediated repression and therefore allows nucellus degeneration. Further downstream in the pathway, the TRANSPARENT TESTA16 (TT16) and GORDITA MADS box transcription factors promote nucellus degeneration. Moreover, we demonstrate that TT16 mediates the crosstalk between nucellus and seed coat maternal tissues. Finally, we characterize the nucellus cell death program and its feedback role in timing endosperm development. Altogether, our data reveal the antagonistic development of nucellus and endosperm, in coordination with seed coat differentiation." @default.
- W2395585525 created "2016-06-24" @default.
- W2395585525 creator A5027254608 @default.
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- W2395585525 date "2016-05-27" @default.
- W2395585525 modified "2023-10-16" @default.
- W2395585525 title "Endosperm and Nucellus Develop Antagonistically in Arabidopsis Seeds" @default.
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- W2395585525 doi "https://doi.org/10.1105/tpc.16.00041" @default.
- W2395585525 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4944409" @default.
- W2395585525 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27233529" @default.
- W2395585525 hasPublicationYear "2016" @default.
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