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  • 1
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    Altered circadian rhythms regulate growth vigour in hybrids and allopolyploids (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-11-26
    Description: Segregating hybrids and stable allopolyploids display morphological vigour, and Arabidopsis allotetraploids are larger than the parents Arabidopsis thaliana and Arabidopsis arenosa-the mechanisms for this are unknown. Circadian clocks mediate metabolic pathways and increase fitness in animals and plants. Here we report that epigenetic modifications of the circadian clock genes CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) and LATE ELONGATED HYPOCOTYL (LHY) and their reciprocal regulators TIMING OF CAB EXPRESSION 1 (TOC1) and GIGANTEA (GI) mediate expression changes in downstream genes and pathways. During the day, epigenetic repression of CCA1 and LHY induced the expression of TOC1, GI and downstream genes containing evening elements in chlorophyll and starch metabolic pathways in allotetraploids and F(1) hybrids, which produced more chlorophyll and starch than the parents in the same environment. Mutations in cca1 and cca1 lhy and the daily repression of cca1 by RNA interference (RNAi) in TOC1::cca1(RNAi) transgenic plants increased the expression of downstream genes and increased chlorophyll and starch content, whereas constitutively expressing CCA1 or ectopically expressing TOC1::CCA1 had the opposite effect. The causal effects of CCA1 on output traits suggest that hybrids and allopolyploids gain advantages from the control of circadian-mediated physiological and metabolic pathways, leading to growth vigour and increased biomass.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2679702/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2679702/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ni, Zhongfu -- Kim, Eun-Deok -- Ha, Misook -- Lackey, Erika -- Liu, Jianxin -- Zhang, Yirong -- Sun, Qixin -- Chen, Z Jeffrey -- GM067015/GM/NIGMS NIH HHS/ -- R01 GM067015/GM/NIGMS NIH HHS/ -- R01 GM067015-04/GM/NIGMS NIH HHS/ -- R01 GM067015-05/GM/NIGMS NIH HHS/ -- R01 GM067015-06/GM/NIGMS NIH HHS/ -- England -- Nature. 2009 Jan 15;457(7227):327-31. doi: 10.1038/nature07523. Epub 2008 Nov 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Molecular Cell and Developmental Biology, The University of Texas at Austin, One University Station, A-4800, Austin, Texas 78712, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19029881" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/classification/*genetics/*growth & development ; Arabidopsis Proteins/genetics/metabolism ; Base Sequence ; Biological Clocks/genetics/physiology ; Chlorophyll/metabolism ; Chromatin/genetics ; Circadian Rhythm/genetics/*physiology ; DNA-Binding Proteins/genetics/metabolism ; Epigenesis, Genetic ; Gene Expression Regulation, Plant/genetics ; *Hybridization, Genetic ; Plants, Genetically Modified ; *Polyploidy ; Starch/biosynthesis ; Transcription Factors/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    BZR1 is a transcriptional repressor with dual roles in brassinosteroid homeostasis and growth responses (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-02-01
    Description: Brassinosteroid (BR) homeostasis and signaling are crucial for normal growth and development of plants. BR signaling through cell-surface receptor kinases and intracellular components leads to dephosphorylation and accumulation of the nuclear protein BZR1. How BR signaling regulates gene expression, however, remains unknown. Here we show that BZR1 is a transcriptional repressor that has a previously unknown DNA binding domain and binds directly to the promoters of feedback-regulated BR biosynthetic genes. Microarray analyses identified additional potential targets of BZR1 and illustrated, together with physiological studies, that BZR1 coordinates BR homeostasis and signaling by playing dual roles in regulating BR biosynthesis and downstream growth responses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2925132/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2925132/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉He, Jun-Xian -- Gendron, Joshua M -- Sun, Yu -- Gampala, Srinivas S L -- Gendron, Nathan -- Sun, Catherine Qing -- Wang, Zhi-Yong -- 5T32GM007276/GM/NIGMS NIH HHS/ -- R01 GM066258/GM/NIGMS NIH HHS/ -- R01 GM066258-04/GM/NIGMS NIH HHS/ -- R01 GM66258-01/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Mar 11;307(5715):1634-8. Epub 2005 Jan 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Biology, Carnegie Institution, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15681342" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/*genetics/growth & development/physiology ; Arabidopsis Proteins/genetics/*metabolism ; Base Sequence ; Binding Sites ; Chromatin Immunoprecipitation ; DNA-Binding Proteins/genetics/*metabolism ; Feedback, Physiological ; *Gene Expression Regulation, Plant ; Genes, Plant ; Genes, Reporter ; Homeostasis ; Light ; Mutation ; Nuclear Proteins/genetics/*metabolism ; Oligonucleotide Array Sequence Analysis ; Phenotype ; Plant Growth Regulators/biosynthesis/*metabolism/pharmacology ; Plants, Genetically Modified ; Promoter Regions, Genetic ; Recombinant Fusion Proteins/metabolism ; Repressor Proteins/metabolism ; *Signal Transduction ; Steroids/biosynthesis/*metabolism/pharmacology ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Ethylene insensitivity conferred by Arabidopsis ERS gene (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-09-22
    Description: ERS (ethylene response sensor), a gene in the Arabidopsis thaliana ethylene hormone-response pathway, was uncovered by cross-hybridization with the Arabidopsis ETR1 gene. The deduced ERS protein has sequence similarity with the amino-terminal domain and putative histidine protein kinase domain of ETR1, but it does not have a receiver domain as found in ETR1. A missense mutation identical to the dominant etr1-4 mutation was introduced into the ERS gene. The altered ERS gene conferred dominant ethylene insensitivity to wild-type Arabidopsis. Double-mutant analysis indicates that ERS acts upstream of the CTR1 protein kinase gene in the ethylene-response pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hua, J -- Chang, C -- Sun, Q -- Meyerowitz, E M -- New York, N.Y. -- Science. 1995 Sep 22;269(5231):1712-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, California Institute of Technology, Pasadena 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569898" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/chemistry/drug effects/*genetics/physiology ; Arabidopsis Proteins ; Base Sequence ; Cloning, Molecular ; Ethylenes/*pharmacology ; *Genes, Plant ; Kanamycin Resistance ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Phenotype ; Plant Proteins/chemistry/*genetics/physiology ; Plants, Genetically Modified ; *Receptors, Cell Surface
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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