ALBERT

Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gefter, Amanda -- England -- Nature. 2014 May 29;509(7502):552-3. doi: 10.1038/509552a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24870527" target="_blank"〉PubMed〈/a〉

Description: Nitrous oxide (N2O) is an important greenhouse gas and ozone-depleting substance that has anthropogenic as well as natural marine and terrestrial sources. The tropospheric N2O concentrations have varied substantially in the past in concert with changing climate on glacial-interglacial and millennial timescales. It is not well understood, however, how N2O emissions from marine and terrestrial sources change in response to varying environmental conditions. The distinct isotopic compositions of marine and terrestrial N2O sources can help disentangle the relative changes in marine and terrestrial N2O emissions during past climate variations. Here we present N2O concentration and isotopic data for the last deglaciation, from 16,000 to 10,000 years before present, retrieved from air bubbles trapped in polar ice at Taylor Glacier, Antarctica. With the help of our data and a box model of the N2O cycle, we find a 30 per cent increase in total N2O emissions from the late glacial to the interglacial, with terrestrial and marine emissions contributing equally to the overall increase and generally evolving in parallel over the last deglaciation, even though there is no a priori connection between the drivers of the two sources. However, we find that terrestrial emissions dominated on centennial timescales, consistent with a state-of-the-art dynamic global vegetation and land surface process model that suggests that during the last deglaciation emission changes were strongly influenced by temperature and precipitation patterns over land surfaces. The results improve our understanding of the drivers of natural N2O emissions and are consistent with the idea that natural N2O emissions will probably increase in response to anthropogenic warming.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schilt, Adrian -- Brook, Edward J -- Bauska, Thomas K -- Baggenstos, Daniel -- Fischer, Hubertus -- Joos, Fortunat -- Petrenko, Vasilii V -- Schaefer, Hinrich -- Schmitt, Jochen -- Severinghaus, Jeffrey P -- Spahni, Renato -- Stocker, Thomas F -- England -- Nature. 2014 Dec 11;516(7530):234-7. doi: 10.1038/nature13971.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA [2] Climate and Environmental Physics, Physics Institute, and Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland. ; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA. ; Scripps Institution of Oceanography, University of California, San Diego, California 92037, USA. ; Climate and Environmental Physics, Physics Institute, and Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland. ; Department of Earth and Environmental Sciences, University of Rochester, Rochester, New York 14627, USA. ; National Institute of Water and Atmospheric Research, Wellington 6021, New Zealand.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25503236" target="_blank"〉PubMed〈/a〉

Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cressey, Daniel -- England -- Nature. 2014 Apr 10;508(7495):159. doi: 10.1038/508159a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24717487" target="_blank"〉PubMed〈/a〉

Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schindel, David E -- du Plessis, Pierre -- England -- Nature. 2014 Nov 6;515(7525):37. doi: 10.1038/515037a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Museum of Natural History, Smithsonian Institution, Washington DC, USA. ; CRIAA Southern African Development and Consulting, Windhoek, Namibia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25373666" target="_blank"〉PubMed〈/a〉

Description: How biological systems generate reproducible patterns with high precision is a central question in science. The shoot apical meristem (SAM), a specialized tissue producing plant aerial organs, is a developmental system of choice to address this question. Organs are periodically initiated at the SAM at specific spatial positions and this spatiotemporal pattern defines phyllotaxis. Accumulation of the plant hormone auxin triggers organ initiation, whereas auxin depletion around organs generates inhibitory fields that are thought to be sufficient to maintain these patterns and their dynamics. Here we show that another type of hormone-based inhibitory fields, generated directly downstream of auxin by intercellular movement of the cytokinin signalling inhibitor ARABIDOPSIS HISTIDINE PHOSPHOTRANSFER PROTEIN 6 (AHP6), is involved in regulating phyllotactic patterns. We demonstrate that AHP6-based fields establish patterns of cytokinin signalling in the meristem that contribute to the robustness of phyllotaxis by imposing a temporal sequence on organ initiation. Our findings indicate that not one but two distinct hormone-based fields may be required for achieving temporal precision during formation of reiterative structures at the SAM, thus indicating an original mechanism for providing robustness to a dynamic developmental system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Besnard, Fabrice -- Refahi, Yassin -- Morin, Valerie -- Marteaux, Benjamin -- Brunoud, Geraldine -- Chambrier, Pierre -- Rozier, Frederique -- Mirabet, Vincent -- Legrand, Jonathan -- Laine, Stephanie -- Thevenon, Emmanuel -- Farcot, Etienne -- Cellier, Coralie -- Das, Pradeep -- Bishopp, Anthony -- Dumas, Renaud -- Parcy, Francois -- Helariutta, Yka -- Boudaoud, Arezki -- Godin, Christophe -- Traas, Jan -- Guedon, Yann -- Vernoux, Teva -- England -- Nature. 2014 Jan 16;505(7483):417-21. doi: 10.1038/nature12791. Epub 2013 Dec 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Laboratoire de Reproduction et Developpement des Plantes, CNRS, INRA, ENS Lyon, UCBL, Universite de Lyon, 69364 Lyon, France [2] IBENS, ENS, 75005 Paris, France (F.B.); UMR CNRS 5534, Universite Claude Bernard Lyon I, Batiment Gregor Mendel, 16 rue Raphael Dubois, 69622 Villeurbanne, France (V.M.); University of Nottingham, University Park, Nottingham NG7 2RD, UK (E.F); University of Nottingham, Sutton Bonington LE12 5RD, UK (A.Bi.). ; Virtual Plants INRIA/CIRAD/INRA Project Team, UMR AGAP, Institut de Biologie Computationelle, 34095 Montpellier, France. ; 1] Laboratoire de Reproduction et Developpement des Plantes, CNRS, INRA, ENS Lyon, UCBL, Universite de Lyon, 69364 Lyon, France [2] IBENS, ENS, 75005 Paris, France (F.B.); UMR CNRS 5534, Universite Claude Bernard Lyon I, Batiment Gregor Mendel, 16 rue Raphael Dubois, 69622 Villeurbanne, France (V.M.); University of Nottingham, University Park, Nottingham NG7 2RD, UK (E.F); University of Nottingham, Sutton Bonington LE12 5RD, UK (A.Bi.). [3]. ; 1] Laboratoire de Reproduction et Developpement des Plantes, CNRS, INRA, ENS Lyon, UCBL, Universite de Lyon, 69364 Lyon, France [2]. ; Laboratoire de Reproduction et Developpement des Plantes, CNRS, INRA, ENS Lyon, UCBL, Universite de Lyon, 69364 Lyon, France. ; 1] Laboratoire de Reproduction et Developpement des Plantes, CNRS, INRA, ENS Lyon, UCBL, Universite de Lyon, 69364 Lyon, France [2] Laboratoire Joliot-Curie, CNRS, ENS Lyon, Universite de Lyon, 69364 Lyon, France. ; 1] Laboratoire de Reproduction et Developpement des Plantes, CNRS, INRA, ENS Lyon, UCBL, Universite de Lyon, 69364 Lyon, France [2] Virtual Plants INRIA/CIRAD/INRA Project Team, UMR AGAP, Institut de Biologie Computationelle, 34095 Montpellier, France [3] Laboratoire Joliot-Curie, CNRS, ENS Lyon, Universite de Lyon, 69364 Lyon, France. ; Laboratoire Physiologie Cellulaire et Vegetale, CEA, CNRS, INRA, UJF, 38041 Grenoble, France. ; 1] Virtual Plants INRIA/CIRAD/INRA Project Team, UMR AGAP, Institut de Biologie Computationelle, 34095 Montpellier, France [2] IBENS, ENS, 75005 Paris, France (F.B.); UMR CNRS 5534, Universite Claude Bernard Lyon I, Batiment Gregor Mendel, 16 rue Raphael Dubois, 69622 Villeurbanne, France (V.M.); University of Nottingham, University Park, Nottingham NG7 2RD, UK (E.F); University of Nottingham, Sutton Bonington LE12 5RD, UK (A.Bi.). ; 1] Institute of Biotechnology/Department of Biosciences, University of Helsinki, FIN-00014, Finland [2] IBENS, ENS, 75005 Paris, France (F.B.); UMR CNRS 5534, Universite Claude Bernard Lyon I, Batiment Gregor Mendel, 16 rue Raphael Dubois, 69622 Villeurbanne, France (V.M.); University of Nottingham, University Park, Nottingham NG7 2RD, UK (E.F); University of Nottingham, Sutton Bonington LE12 5RD, UK (A.Bi.). ; Institute of Biotechnology/Department of Biosciences, University of Helsinki, FIN-00014, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24336201" target="_blank"〉PubMed〈/a〉

Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2014 Oct 16;514(7522):273. doi: 10.1038/514273a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25318484" target="_blank"〉PubMed〈/a〉

Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cressey, Daniel -- England -- Nature. 2014 Mar 6;507(7490):18. doi: 10.1038/507018a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24598618" target="_blank"〉PubMed〈/a〉