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  • 1
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    Genetic control of surface curvature (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-01
    Description: Although curvature of biological surfaces has been considered from mathematical and biophysical perspectives, its molecular and developmental basis is unclear. We have studied the cin mutant of Antirrhinum, which has crinkly rather than flat leaves. Leaves of cin display excess growth in marginal regions, resulting in a gradual introduction of negative curvature during development. This reflects a change in the shape and the progression of a cell-cycle arrest front moving from the leaf tip toward the base. CIN encodes a TCP protein and is expressed downstream of the arrest front. We propose that CIN promotes zero curvature (flatness) by making cells more sensitive to an arrest signal, particularly in marginal regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nath, Utpal -- Crawford, Brian C W -- Carpenter, Rosemary -- Coen, Enrico -- New York, N.Y. -- Science. 2003 Feb 28;299(5611):1404-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12610308" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antirrhinum/cytology/*genetics/*growth & development/metabolism ; Base Sequence ; Cell Cycle ; Cell Differentiation ; Cell Division ; Cell Size ; Cyclin D3 ; Cyclins/genetics/metabolism ; Gene Deletion ; *Gene Expression Regulation, Plant ; *Genes, Plant ; Histones/genetics/metabolism ; Molecular Sequence Data ; Mutagenesis, Insertional ; Mutation ; Plant Leaves/anatomy & histology/cytology/*growth & development/metabolism ; Plant Proteins/chemistry/genetics/metabolism ; Surface Properties ; Transcription Factors/chemistry/genetics/*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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  • 2
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    Evolution and development of inflorescence architectures (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-05-26
    Description: To understand the constraints on biological diversity, we analyzed how selection and development interact to control the evolution of inflorescences, the branching structures that bear flowers. We show that a single developmental model accounts for the restricted range of inflorescence types observed in nature and that this model is supported by molecular genetic studies. The model predicts associations between inflorescence architecture, climate, and life history, which we validated empirically. Paths, or evolutionary wormholes, link different architectures in a multidimensional fitness space, but the rate of evolution along these paths is constrained by genetic and environmental factors, which explains why some evolutionary transitions are rare between closely related plant taxa.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prusinkiewicz, Przemyslaw -- Erasmus, Yvette -- Lane, Brendan -- Harder, Lawrence D -- Coen, Enrico -- New York, N.Y. -- Science. 2007 Jun 8;316(5830):1452-6. Epub 2007 May 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Computer Science, University of Calgary, 2500 University Drive N.W. Calgary, Alberta T2N 1N4, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17525303" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/*anatomy & histology/genetics/*growth & development ; Arabidopsis Proteins/genetics/physiology ; *Biological Evolution ; Climate ; Computer Simulation ; Flowers/*anatomy & histology/genetics/*growth & development ; Gene Expression ; Genes, Plant ; Mathematics ; Meristem/growth & development ; *Models, Biological ; Selection, Genetic ; Transcription Factors/genetics/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Regulatory genes control a key morphological and ecological trait transferred between species (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-11-15
    Description: Hybridization between species can lead to introgression of genes from one species to another, providing a potential mechanism for preserving and recombining key traits during evolution. To determine the molecular basis of such transfers, we analyzed a natural polymorphism for flower-head development in Senecio. We show that the polymorphism arose by introgression of a cluster of regulatory genes, the RAY locus, from the diploid species S. squalidus into the tetraploid S. vulgaris. The RAY genes are expressed in the peripheral regions of the inflorescence meristem, where they promote flower asymmetry and lead to an increase in the rate of outcrossing. Our results highlight how key morphological and ecological traits controlled by regulatory genes may be gained, lost, and regained during evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Minsung -- Cui, Min-Long -- Cubas, Pilar -- Gillies, Amanda -- Lee, Karen -- Chapman, Mark A -- Abbott, Richard J -- Coen, Enrico -- BB-D017742/Biotechnology and Biological Sciences Research Council/United Kingdom -- G10929/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2008 Nov 14;322(5904):1116-9. doi: 10.1126/science.1164371.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Developmental Biology, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19008450" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Biological Evolution ; Crosses, Genetic ; Flowers/anatomy & histology/*genetics/growth & development ; *Gene Transfer, Horizontal ; *Genes, Plant ; *Genes, Regulator ; Genotype ; Haplotypes ; *Hybridization, Genetic ; Molecular Sequence Data ; Multigene Family ; Phylogeny ; Polymorphism, Genetic ; Selection, Genetic ; Senecio/*genetics/growth & development ; Sequence Analysis, DNA
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Inflorescence commitment and architecture in Arabidopsis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-03
    Description: Flowering plants exhibit one of two types of inflorescence architecture: indeterminate, in which the inflorescence grows indefinitely, or determinate, in which a terminal flower is produced. The indeterminate condition is thought to have evolved from the determinate many times, independently. In two mutants in distantly related species, terminal flower 1 in Arabidopsis and centroradialis in Antirrhinum, inflorescences that are normally indeterminate are converted to a determinate architecture. The Antirrhinum gene CENTRORADIALIS (CEN) and the Arabidopsis gene TERMINAL FLOWER 1 (TFL1) were shown to be homologous, which suggests that a common mechanism underlies indeterminacy in these plants. However, unlike CEN, TFL1 is also expressed during the vegetative phase, where it delays the commitment to inflorescence development and thus affects the timing of the formation of the inflorescence meristem as well as its identity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bradley, D -- Ratcliffe, O -- Vincent, C -- Carpenter, R -- Coen, E -- New York, N.Y. -- Science. 1997 Jan 3;275(5296):80-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sainsbury Laboratory, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8974397" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/*genetics/*growth & development/metabolism ; *Arabidopsis Proteins ; Biological Evolution ; Exons ; Gene Expression ; *Genes, Plant ; Meristem/growth & development/metabolism ; Molecular Sequence Data ; Mutation ; Plant Development ; Plant Proteins/chemistry/*genetics/physiology ; Plants/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Evolutionary paths underlying flower color variation in Antirrhinum (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-08-19
    Description: To understand evolutionary paths connecting diverse biological forms, we defined a three-dimensional genotypic space separating two flower color morphs of Antirrhinum. A hybrid zone between morphs showed a steep cline specifically at genes controlling flower color differences, indicating that these loci are under selection. Antirrhinum species with diverse floral phenotypes formed a U-shaped cloud within the genotypic space. We propose that this cloud defines an evolutionary path that allows flower color to evolve while circumventing less-adaptive regions. Hybridization between morphs located in different arms of the U-shaped path yields low-fitness genotypes, accounting for the observed steep clines at hybrid zones.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Whibley, Annabel C -- Langlade, Nicolas B -- Andalo, Christophe -- Hanna, Andrew I -- Bangham, Andrew -- Thebaud, Christophe -- Coen, Enrico -- New York, N.Y. -- Science. 2006 Aug 18;313(5789):963-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Developmental Biology, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16917061" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Biological ; Alleles ; Antirrhinum/classification/*genetics ; Base Sequence ; *Biological Evolution ; Crosses, Genetic ; Flowers/*genetics ; Gene Flow ; Gene Frequency ; Genes, Plant ; *Genetic Speciation ; Genotype ; Haplotypes ; Hybridization, Genetic ; Models, Genetic ; Molecular Sequence Data ; Phenotype ; Phylogeny ; Pigmentation/*genetics ; Pigments, Biological/genetics ; Principal Component Analysis ; Selection, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Generation of leaf shape through early patterns of growth and tissue polarity (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-03-03
    Description: A major challenge in biology is to understand how buds comprising a few cells can give rise to complex plant and animal appendages like leaves or limbs. We address this problem through a combination of time-lapse imaging, clonal analysis, and computational modeling. We arrive at a model that shows how leaf shape can arise through feedback between early patterns of oriented growth and tissue deformation. Experimental tests through partial leaf ablation support this model and allow reevaluation of previous experimental studies. Our model allows a range of observed leaf shapes to be generated and predicts observed clone patterns in different species. Thus, our experimentally validated model may underlie the development and evolution of diverse organ shapes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuchen, Erika E -- Fox, Samantha -- de Reuille, Pierre Barbier -- Kennaway, Richard -- Bensmihen, Sandra -- Avondo, Jerome -- Calder, Grant M -- Southam, Paul -- Robinson, Sarah -- Bangham, Andrew -- Coen, Enrico -- Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2012 Mar 2;335(6072):1092-6. doi: 10.1126/science.1214678.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉John Innes Centre, Norwich Research Park, Norwich, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22383846" target="_blank"〉PubMed〈/a〉
    Keywords: Antirrhinum/anatomy & histology/genetics/growth & development ; Arabidopsis/anatomy & histology/genetics/growth & development ; Arabidopsis Proteins/genetics/metabolism ; Cell Polarity ; Computer Simulation ; Genes, Plant ; *Models, Biological ; *Morphogenesis ; Plant Leaves/*anatomy & histology/cytology/*growth & development ; Time-Lapse Imaging
    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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