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  • 1
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    MONOPTEROS controls embryonic root initiation by regulating a mobile transcription factor (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-03-12
    Description: Acquisition of cell identity in plants relies strongly on positional information, hence cell-cell communication and inductive signalling are instrumental for developmental patterning. During Arabidopsis embryogenesis, an extra-embryonic cell is specified to become the founder cell of the primary root meristem, hypophysis, in response to signals from adjacent embryonic cells. The auxin-dependent transcription factor MONOPTEROS (MP) drives hypophysis specification by promoting transport of the hormone auxin from the embryo to the hypophysis precursor. However, auxin accumulation is not sufficient for hypophysis specification, indicating that additional MP-dependent signals are required. Here we describe the microarray-based isolation of MP target genes that mediate signalling from embryo to hypophysis. Of three direct transcriptional target genes, TARGET OF MP 5 (TMO5) and TMO7 encode basic helix-loop-helix (bHLH) transcription factors that are expressed in the hypophysis-adjacent embryo cells, and are required and partially sufficient for MP-dependent root initiation. Importantly, the small TMO7 transcription factor moves from its site of synthesis in the embryo to the hypophysis precursor, thus representing a novel MP-dependent intercellular signal in embryonic root specification.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schlereth, Alexandra -- Moller, Barbara -- Liu, Weilin -- Kientz, Marika -- Flipse, Jacky -- Rademacher, Eike H -- Schmid, Markus -- Jurgens, Gerd -- Weijers, Dolf -- England -- Nature. 2010 Apr 8;464(7290):913-6. doi: 10.1038/nature08836. Epub 2010 Mar 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Entwicklungsgenetik, Zentrum fur Molekularbiologie der Pflanzen (ZMBP), Universitat Tubingen, Auf der Morgenstelle 3, 72076 Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20220754" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/cytology/*embryology/*metabolism ; Arabidopsis Proteins/*metabolism ; Basic Helix-Loop-Helix Transcription Factors/metabolism ; DNA-Binding Proteins/*metabolism ; Embryonic Development/genetics ; *Gene Expression Regulation, Plant ; Genes, Plant/genetics ; Indoleacetic Acids/metabolism ; Meristem/cytology/embryology/metabolism ; Oligonucleotide Array Sequence Analysis ; Plant Roots/cytology/*embryology/*metabolism ; Signal Transduction ; Transcription Factors/*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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    A PINOID-dependent binary switch in apical-basal PIN polar targeting directs auxin efflux (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-10-30
    Description: Polar transport-dependent local accumulation of auxin provides positional cues for multiple plant patterning processes. This directional auxin flow depends on the polar subcellular localization of the PIN auxin efflux regulators. Overexpression of the PINOID protein kinase induces a basal-to-apical shift in PIN localization, resulting in the loss of auxin gradients and strong defects in embryo and seedling roots. Conversely, pid loss of function induces an apical-to-basal shift in PIN1 polar targeting at the inflorescence apex, accompanied by defective organogenesis. Our results show that a PINOID-dependent binary switch controls PIN polarity and mediates changes in auxin flow to create local gradients for patterning processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Friml, Jiri -- Yang, Xiong -- Michniewicz, Marta -- Weijers, Dolf -- Quint, Ab -- Tietz, Olaf -- Benjamins, Rene -- Ouwerkerk, Pieter B F -- Ljung, Karin -- Sandberg, Goran -- Hooykaas, Paul J J -- Palme, Klaus -- Offringa, Remko -- New York, N.Y. -- Science. 2004 Oct 29;306(5697):862-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Genetics, Center for Molecular Biology of Plants, University Tubingen, Auf der Morgenstelle 3, D-72076 Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15514156" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/cytology/genetics/growth & development/*metabolism ; Arabidopsis Proteins/genetics/*metabolism ; Biological Transport ; Gene Expression Regulation, Plant ; Indoleacetic Acids/*metabolism ; Membrane Transport Proteins/genetics/*metabolism ; Meristem/metabolism ; Mutation ; Plant Epidermis/cytology/metabolism ; Plant Roots/metabolism ; Plant Shoots/metabolism ; Plants, Genetically Modified ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Seeds/metabolism
    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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    Plant development. Integration of growth and patterning during vascular tissue formation in Arabidopsis (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-08-12
    Description: Coordination of cell division and pattern formation is central to tissue and organ development, particularly in plants where walls prevent cell migration. Auxin and cytokinin are both critical for division and patterning, but it is unknown how these hormones converge upon tissue development. We identify a genetic network that reinforces an early embryonic bias in auxin distribution to create a local, nonresponding cytokinin source within the root vascular tissue. Experimental and theoretical evidence shows that these cells act as a tissue organizer by positioning the domain of oriented cell divisions. We further demonstrate that the auxin-cytokinin interaction acts as a spatial incoherent feed-forward loop, which is essential to generate distinct hormonal response zones, thus establishing a stable pattern within a growing vascular tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉De Rybel, Bert -- Adibi, Milad -- Breda, Alice S -- Wendrich, Jos R -- Smit, Margot E -- Novak, Ondrej -- Yamaguchi, Nobutoshi -- Yoshida, Saiko -- Van Isterdael, Gert -- Palovaara, Joakim -- Nijsse, Bart -- Boekschoten, Mark V -- Hooiveld, Guido -- Beeckman, Tom -- Wagner, Doris -- Ljung, Karin -- Fleck, Christian -- Weijers, Dolf -- New York, N.Y. -- Science. 2014 Aug 8;345(6197):1255215. doi: 10.1126/science.1255215.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Biochemistry, Wageningen University, Dreijenlaan 3, 6703HA Wageningen, the Netherlands. ; LifeGlimmer GmbH, Markelstrasse 38, 12163 Berlin, Germany. Albert-Ludwigs-University Freiburg, Faculty of Biology, Plant Biotechnology, Schaenzlestrasse 1, D-79104 Freiburg, Germany. Laboratory of Systems and Synthetic Biology, Wageningen University, Dreijenlaan 3, 6703HA Wageningen, the Netherlands. ; Umea Plant Science Centre (UPSC), Department of Forest Genetics and Plant Physiology, SLU, SE-901 83 Umea, Sweden. Laboratory of Growth Regulators, Centre of the Region Hana for Biotechnological and Agricultural Research, Palacky University and Institute of Experimental Botany AS CR, Slechtitelu 11, CZ-78371 Olomouc, Czech Republic. ; Department of Biology, University of Pennsylvania, Philadelphia, PA 190104-6084, USA. ; Department of Plant Systems Biology, VIB, Technologiepark 927, 9052 Gent, Belgium. Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, 9052 Gent, Belgium. ; Laboratory of Systems and Synthetic Biology, Wageningen University, Dreijenlaan 3, 6703HA Wageningen, the Netherlands. ; Division of Human Nutrition, Wageningen University, Dreijenlaan 2, 6703HA Wageningen, the Netherlands. TI Food and Nutrition, 6703HA Wageningen, the Netherlands. ; Division of Human Nutrition, Wageningen University, Dreijenlaan 2, 6703HA Wageningen, the Netherlands. ; Umea Plant Science Centre (UPSC), Department of Forest Genetics and Plant Physiology, SLU, SE-901 83 Umea, Sweden. ; Laboratory of Systems and Synthetic Biology, Wageningen University, Dreijenlaan 3, 6703HA Wageningen, the Netherlands. dolf.weijers@wur.nl christian.fleck@wur.nl. ; Laboratory of Biochemistry, Wageningen University, Dreijenlaan 3, 6703HA Wageningen, the Netherlands. dolf.weijers@wur.nl christian.fleck@wur.nl.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25104393" target="_blank"〉PubMed〈/a〉
    Keywords: Aminohydrolases ; Arabidopsis/drug effects/genetics/*growth & development ; Arabidopsis Proteins/genetics/metabolism ; Basic Helix-Loop-Helix Transcription Factors/metabolism ; Body Patterning/drug effects/genetics/*physiology ; Cell Division/genetics/physiology ; Cytokines/biosynthesis ; Gene Expression Regulation, Developmental ; Gene Expression Regulation, Plant ; Gene Regulatory Networks ; Indoleacetic Acids/*metabolism/pharmacology ; Nuclear Proteins/genetics ; Plant Vascular Bundle/drug effects/*growth & development ; Trans-Activators/metabolism
    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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  • 4
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    Cyclophilin 40 is required for microRNA activity in Arabidopsis (2009)
    National Academy of Sciences
    Details
    Publication Date: 2009-03-16
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 5
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    Bimodular auxin response controls organogenesis in Arabidopsis (2010)
    National Academy of Sciences
    Details
    Publication Date: 2010-01-25
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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