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Integration of epigenetic and genetic controls of seed size by cytokinin in Arabidopsis

The development of seeds in flowering plants is placed under complex interactions between maternal tissues, the embryo, and the endosperm. The endosperm plays a major role in the regulation of seed size. In Arabidopsis thaliana, endosperm size depends on the coordination of the genetic pathway HAIKU... Full description

Journal Title: Proceedings of the National Academy of Sciences USA, Sep 2013, Vol.110(38), p.15479
Main Author: Li, Jing
Other Authors: Nie, Xin , Berger, Frederic , Li, Jing
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: © ProQuest LLC All rights reserved
ID: ISSN: 0027-8424
Link: http://search.proquest.com/docview/1448220585/?pq-origsite=primo
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title: Integration of epigenetic and genetic controls of seed size by cytokinin in Arabidopsis
format: Article
creator:
  • Li, Jing
  • Nie, Xin
  • Berger, Frederic
  • Li, Jing
subjects:
  • Endosperm
  • Genomes
  • Flowering
  • Seeds
  • Cytokinins
  • Gametes
  • Lysine
  • Integration
  • Demethylation
  • Epigenetics
  • Transcription Factors
  • DNA Methylation
  • Genetic Control
  • Embryos
  • Angiosperms
  • Histone H3
  • Signal Transduction
  • Arabidopsis Thaliana
  • Plants and Algae
  • DNA Metabolism & Structure
ispartof: Proceedings of the National Academy of Sciences, USA, Sep 2013, Vol.110(38), p.15479
description: The development of seeds in flowering plants is placed under complex interactions between maternal tissues, the embryo, and the endosperm. The endosperm plays a major role in the regulation of seed size. In Arabidopsis thaliana, endosperm size depends on the coordination of the genetic pathway HAIKU (IKU) with epigenetic controls comprising genome dosage, DNA methylation, and trimethylated lysine 27 on histone H3 (H3K27me3) deposition. However, the effectors that integrate these pathways have remained unknown. Here, we identify a target of the IKU pathway, the cytokinin oxidase CKX2, that affects cytokinin signaling. CKX2 expression is activated by the IKU transcription factor WRKY10 directly and promotes endosperm growth. CKX2 expression also depends on H3K27me3 deposition, which fluctuates in response to maternal genome dosage imbalance and DNA demethylation of male gametes. Hence, the control of endosperm growth by CKX2 integrates genetic and epigenetic regulations. In angiosperms, cytokinins are highly active in endosperm, and we propose that IKU effectors coordinate environmental and physiological factors, resulting in modulation of seed size.
language: eng
source: © ProQuest LLC All rights reserved
identifier: ISSN: 0027-8424
fulltext: fulltext
issn:
  • 00278424
  • 0027-8424
url: Link


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titleIntegration of epigenetic and genetic controls of seed size by cytokinin in Arabidopsis
creatorLi, Jing ; Nie, Xin ; Berger, Frederic ; Li, Jing
contributorLi, Jing (correspondence author)
ispartofProceedings of the National Academy of Sciences, USA, Sep 2013, Vol.110(38), p.15479
identifierISSN: 0027-8424
subjectEndosperm ; Genomes ; Flowering ; Seeds ; Cytokinins ; Gametes ; Lysine ; Integration ; Demethylation ; Epigenetics ; Transcription Factors ; DNA Methylation ; Genetic Control ; Embryos ; Angiosperms ; Histone H3 ; Signal Transduction ; Arabidopsis Thaliana ; Plants and Algae ; DNA Metabolism & Structure
descriptionThe development of seeds in flowering plants is placed under complex interactions between maternal tissues, the embryo, and the endosperm. The endosperm plays a major role in the regulation of seed size. In Arabidopsis thaliana, endosperm size depends on the coordination of the genetic pathway HAIKU (IKU) with epigenetic controls comprising genome dosage, DNA methylation, and trimethylated lysine 27 on histone H3 (H3K27me3) deposition. However, the effectors that integrate these pathways have remained unknown. Here, we identify a target of the IKU pathway, the cytokinin oxidase CKX2, that affects cytokinin signaling. CKX2 expression is activated by the IKU transcription factor WRKY10 directly and promotes endosperm growth. CKX2 expression also depends on H3K27me3 deposition, which fluctuates in response to maternal genome dosage imbalance and DNA demethylation of male gametes. Hence, the control of endosperm growth by CKX2 integrates genetic and epigenetic regulations. In angiosperms, cytokinins are highly active in endosperm, and we propose that IKU effectors coordinate environmental and physiological factors, resulting in modulation of seed size.
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titleIntegration of epigenetic and genetic controls of seed size by cytokinin in Arabidopsis
descriptionThe development of seeds in flowering plants is placed under complex interactions between maternal tissues, the embryo, and the endosperm. The endosperm plays a major role in the regulation of seed size. In Arabidopsis thaliana, endosperm size depends on the coordination of the genetic pathway HAIKU (IKU) with epigenetic controls comprising genome dosage, DNA methylation, and trimethylated lysine 27 on histone H3 (H3K27me3) deposition. However, the effectors that integrate these pathways have remained unknown. Here, we identify a target of the IKU pathway, the cytokinin oxidase CKX2, that affects cytokinin signaling. CKX2 expression is activated by the IKU transcription factor WRKY10 directly and promotes endosperm growth. CKX2 expression also depends on H3K27me3 deposition, which fluctuates in response to maternal genome dosage imbalance and DNA demethylation of male gametes. Hence, the control of endosperm growth by CKX2 integrates genetic and epigenetic regulations. In angiosperms, cytokinins are highly active in endosperm, and we propose that IKU effectors coordinate environmental and physiological factors, resulting in modulation of seed size.
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titleIntegration of epigenetic and genetic controls of seed size by cytokinin in Arabidopsis
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abstractThe development of seeds in flowering plants is placed under complex interactions between maternal tissues, the embryo, and the endosperm. The endosperm plays a major role in the regulation of seed size. In Arabidopsis thaliana, endosperm size depends on the coordination of the genetic pathway HAIKU (IKU) with epigenetic controls comprising genome dosage, DNA methylation, and trimethylated lysine 27 on histone H3 (H3K27me3) deposition. However, the effectors that integrate these pathways have remained unknown. Here, we identify a target of the IKU pathway, the cytokinin oxidase CKX2, that affects cytokinin signaling. CKX2 expression is activated by the IKU transcription factor WRKY10 directly and promotes endosperm growth. CKX2 expression also depends on H3K27me3 deposition, which fluctuates in response to maternal genome dosage imbalance and DNA demethylation of male gametes. Hence, the control of endosperm growth by CKX2 integrates genetic and epigenetic regulations. In angiosperms, cytokinins are highly active in endosperm, and we propose that IKU effectors coordinate environmental and physiological factors, resulting in modulation of seed size.
urlhttp://search.proquest.com/docview/1448220585/
date2013-09-01