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  • 1
    Publication Date: 2011-11-18
    Description: Legumes (Fabaceae or Leguminosae) are unique among cultivated plants for their ability to carry out endosymbiotic nitrogen fixation with rhizobial bacteria, a process that takes place in a specialized structure known as the nodule. Legumes belong to one of the two main groups of eurosids, the Fabidae, which includes most species capable of endosymbiotic nitrogen fixation. Legumes comprise several evolutionary lineages derived from a common ancestor 60 million years ago (Myr ago). Papilionoids are the largest clade, dating nearly to the origin of legumes and containing most cultivated species. Medicago truncatula is a long-established model for the study of legume biology. Here we describe the draft sequence of the M. truncatula euchromatin based on a recently completed BAC assembly supplemented with Illumina shotgun sequence, together capturing approximately 94% of all M. truncatula genes. A whole-genome duplication (WGD) approximately 58 Myr ago had a major role in shaping the M. truncatula genome and thereby contributed to the evolution of endosymbiotic nitrogen fixation. Subsequent to the WGD, the M. truncatula genome experienced higher levels of rearrangement than two other sequenced legumes, Glycine max and Lotus japonicus. M. truncatula is a close relative of alfalfa (Medicago sativa), a widely cultivated crop with limited genomics tools and complex autotetraploid genetics. As such, the M. truncatula genome sequence provides significant opportunities to expand alfalfa's genomic toolbox.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3272368/" 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/PMC3272368/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Young, Nevin D -- Debelle, Frederic -- Oldroyd, Giles E D -- Geurts, Rene -- Cannon, Steven B -- Udvardi, Michael K -- Benedito, Vagner A -- Mayer, Klaus F X -- Gouzy, Jerome -- Schoof, Heiko -- Van de Peer, Yves -- Proost, Sebastian -- Cook, Douglas R -- Meyers, Blake C -- Spannagl, Manuel -- Cheung, Foo -- De Mita, Stephane -- Krishnakumar, Vivek -- Gundlach, Heidrun -- Zhou, Shiguo -- Mudge, Joann -- Bharti, Arvind K -- Murray, Jeremy D -- Naoumkina, Marina A -- Rosen, Benjamin -- Silverstein, Kevin A T -- Tang, Haibao -- Rombauts, Stephane -- Zhao, Patrick X -- Zhou, Peng -- Barbe, Valerie -- Bardou, Philippe -- Bechner, Michael -- Bellec, Arnaud -- Berger, Anne -- Berges, Helene -- Bidwell, Shelby -- Bisseling, Ton -- Choisne, Nathalie -- Couloux, Arnaud -- Denny, Roxanne -- Deshpande, Shweta -- Dai, Xinbin -- Doyle, Jeff J -- Dudez, Anne-Marie -- Farmer, Andrew D -- Fouteau, Stephanie -- Franken, Carolien -- Gibelin, Chrystel -- Gish, John -- Goldstein, Steven -- Gonzalez, Alvaro J -- Green, Pamela J -- Hallab, Asis -- Hartog, Marijke -- Hua, Axin -- Humphray, Sean J -- Jeong, Dong-Hoon -- Jing, Yi -- Jocker, Anika -- Kenton, Steve M -- Kim, Dong-Jin -- Klee, Kathrin -- Lai, Hongshing -- Lang, Chunting -- Lin, Shaoping -- Macmil, Simone L -- Magdelenat, Ghislaine -- Matthews, Lucy -- McCorrison, Jamison -- Monaghan, Erin L -- Mun, Jeong-Hwan -- Najar, Fares Z -- Nicholson, Christine -- Noirot, Celine -- O'Bleness, Majesta -- Paule, Charles R -- Poulain, Julie -- Prion, Florent -- Qin, Baifang -- Qu, Chunmei -- Retzel, Ernest F -- Riddle, Claire -- Sallet, Erika -- Samain, Sylvie -- Samson, Nicolas -- Sanders, Iryna -- Saurat, Olivier -- Scarpelli, Claude -- Schiex, Thomas -- Segurens, Beatrice -- Severin, Andrew J -- Sherrier, D Janine -- Shi, Ruihua -- Sims, Sarah -- Singer, Susan R -- Sinharoy, Senjuti -- Sterck, Lieven -- Viollet, Agnes -- Wang, Bing-Bing -- Wang, Keqin -- Wang, Mingyi -- Wang, Xiaohong -- Warfsmann, Jens -- Weissenbach, Jean -- White, Doug D -- White, Jim D -- Wiley, Graham B -- Wincker, Patrick -- Xing, Yanbo -- Yang, Limei -- Yao, Ziyun -- Ying, Fu -- Zhai, Jixian -- Zhou, Liping -- Zuber, Antoine -- Denarie, Jean -- Dixon, Richard A -- May, Gregory D -- Schwartz, David C -- Rogers, Jane -- Quetier, Francis -- Town, Christopher D -- Roe, Bruce A -- BB/G023832/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBS/B/11524/Biotechnology and Biological Sciences Research Council/United Kingdom -- England -- Nature. 2011 Nov 16;480(7378):520-4. doi: 10.1038/nature10625.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Pathology, University of Minnesota, St Paul, Minnesota 55108, USA. neviny@umn.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22089132" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; *Genome, Plant ; Medicago truncatula/*genetics/*microbiology ; Molecular Sequence Data ; Nitrogen Fixation/genetics ; Rhizobium/*physiology ; Soybeans/genetics ; *Symbiosis ; Synteny ; Vitis/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    ISSN: 1432-0630
    Keywords: 79.20 Nc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An arrangement for sputter-depth profiling by means of a low pressure hf plasma is described. Extremely plane bombarding craters are obtained when the bombarding voltage, the plasma parameters and the geometry of the target assembly are fitted appropriately. A quantitative relation for plane crater conditions is established, and verified by a comparison with crater profiles created in Ta2O5 layers by the bombardment with Ar+ ions of 100–600 eV. Under optimum conditions the flatness of the crater bottoms being investigated by optical interferometry was in the order of 10Å. The method has been applied for depth profiling of 3500Å thick Ta2O5 layers by Sputtered Neutral Mass Spectrometry (SNMS).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Surface Science 76 (1978), S. 343-354 
    ISSN: 0039-6028
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0029-554X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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