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  • 1
    Publication Date: 2011-09-29
    Description: Seasonal fluctuations in day length regulate important aspects of plant development such as the flowering transition or, in potato (Solanum tuberosum), the formation of tubers. Day length is sensed by the leaves, which produce a mobile signal transported to the shoot apex or underground stems to induce a flowering transition or, respectively, a tuberization transition. Work in Arabidopsis, tomato and rice (Oryza sativa) identified the mobile FLOWERING LOCUS T (FT) protein as a main component of the long-range 'florigen', or flowering hormone, signal. Here we show that expression of the Hd3a gene, the FT orthologue in rice, induces strict short-day potato types to tuberize in long days. Tuber induction is graft transmissible and the Hd3a-GFP protein is detected in the stolons of grafted plants, transport of the fusion protein thus correlating with tuber formation. We provide evidence showing that the potato floral and tuberization transitions are controlled by two different FT-like paralogues (StSP3D and StSP6A) that respond to independent environmental cues, and show that an autorelay mechanism involving CONSTANS modulates expression of the tuberization-control StSP6A gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Navarro, Cristina -- Abelenda, Jose A -- Cruz-Oro, Eduard -- Cuellar, Carlos A -- Tamaki, Shojiro -- Silva, Javier -- Shimamoto, Ko -- Prat, Salome -- England -- Nature. 2011 Sep 25;478(7367):119-22. doi: 10.1038/nature10431.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departamento de Genetica Molecular de Plantas, Centro Nacional de Biotecnologia-CSIC, Calle Darwin 3, 28049 Madrid, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21947007" target="_blank"〉PubMed〈/a〉
    Keywords: Environment ; Flowers/genetics/growth & development/*physiology/radiation effects ; Gene Expression Profiling ; Gene Expression Regulation, Plant ; Genes, Plant/genetics ; Light ; Phenotype ; Plant Leaves/metabolism/radiation effects ; Plant Proteins/genetics/*metabolism ; Plant Tubers/genetics/*growth & development/metabolism/radiation effects ; Plants, Genetically Modified ; Recombinant Fusion Proteins/genetics/metabolism ; Seasons ; Solanum tuberosum/*anatomy & histology/genetics/growth & development/*physiology ; Time Factors ; Transcription Factors/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2013-03-08
    Description: Potato (Solanum tuberosum L.) originates from the Andes and evolved short-day-dependent tuber formation as a vegetative propagation strategy. Here we describe the identification of a central regulator underlying a major-effect quantitative trait locus for plant maturity and initiation of tuber development. We show that this gene belongs to the family of DOF (DNA-binding with one finger) transcription factors and regulates tuberization and plant life cycle length, by acting as a mediator between the circadian clock and the StSP6A mobile tuberization signal. We also show that natural allelic variants evade post-translational light regulation, allowing cultivation outside the geographical centre of origin of potato. Potato is a member of the Solanaceae family and is one of the world's most important food crops. This annual plant originates from the Andean regions of South America. Potato develops tubers from underground stems called stolons. Its equatorial origin makes potato essentially short-day dependent for tuberization and potato will not make tubers in the long-day conditions of spring and summer in the northern latitudes. When introduced in temperate zones, wild material will form tubers in the course of the autumnal shortening of day-length. Thus, one of the first selected traits in potato leading to a European potato type is likely to have been long-day acclimation for tuberization. Potato breeders can exploit the naturally occurring variation in tuberization onset and life cycle length, allowing varietal breeding for different latitudes, harvest times and markets.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kloosterman, Bjorn -- Abelenda, Jose A -- Gomez, Maria del Mar Carretero -- Oortwijn, Marian -- de Boer, Jan M -- Kowitwanich, Krissana -- Horvath, Beatrix M -- van Eck, Herman J -- Smaczniak, Cezary -- Prat, Salome -- Visser, Richard G F -- Bachem, Christian W B -- England -- Nature. 2013 Mar 14;495(7440):246-50. doi: 10.1038/nature11912. Epub 2013 Mar 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Plant Breeding, Department of Plant Sciences, Wageningen-UR, PO Box 386, 6700 AJ Wageningen, The Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23467094" target="_blank"〉PubMed〈/a〉
    Keywords: Acclimatization ; *Agriculture ; *Alleles ; Arabidopsis ; Chromosomes, Plant/genetics ; Circadian Clocks/physiology/radiation effects ; Crops, Agricultural/genetics/growth & development/radiation effects ; Europe ; Flowers/genetics/growth & development ; Gene Expression Regulation, Plant ; Genes, Plant/genetics ; Genetic Variation/*genetics ; Light ; Molecular Sequence Data ; Plant Leaves/metabolism/radiation effects ; Plant Proteins/genetics/metabolism ; Plant Tubers/genetics/growth & development/radiation effects ; Solanum tuberosum/*genetics/*growth & development/radiation effects ; South America ; Time Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2015-05-23
    Description: Human evolutionary scholars have long supposed that the earliest stone tools were made by the genus Homo and that this technological development was directly linked to climate change and the spread of savannah grasslands. New fieldwork in West Turkana, Kenya, has identified evidence of much earlier hominin technological behaviour. We report the discovery of Lomekwi 3, a 3.3-million-year-old archaeological site where in situ stone artefacts occur in spatiotemporal association with Pliocene hominin fossils in a wooded palaeoenvironment. The Lomekwi 3 knappers, with a developing understanding of stone's fracture properties, combined core reduction with battering activities. Given the implications of the Lomekwi 3 assemblage for models aiming to converge environmental change, hominin evolution and technological origins, we propose for it the name 'Lomekwian', which predates the Oldowan by 700,000 years and marks a new beginning to the known archaeological record.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harmand, Sonia -- Lewis, Jason E -- Feibel, Craig S -- Lepre, Christopher J -- Prat, Sandrine -- Lenoble, Arnaud -- Boes, Xavier -- Quinn, Rhonda L -- Brenet, Michel -- Arroyo, Adrian -- Taylor, Nicholas -- Clement, Sophie -- Daver, Guillaume -- Brugal, Jean-Philip -- Leakey, Louise -- Mortlock, Richard A -- Wright, James D -- Lokorodi, Sammy -- Kirwa, Christopher -- Kent, Dennis V -- Roche, Helene -- England -- Nature. 2015 May 21;521(7552):310-5. doi: 10.1038/nature14464.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Turkana Basin Institute, Stony Brook University, Stony Brook, New York 11794-4364, USA [2] CNRS, UMR 7055, Prehistoire et Technologie, Universite Paris Ouest Nanterre La Defense, 21 allee de l'Universite, 92023 Nanterre Cedex, France [3] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya. ; 1] Turkana Basin Institute, Stony Brook University, Stony Brook, New York 11794-4364, USA [2] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [3] Department of Anthropology and Center for Human Evolutionary Studies, Rutgers University, New Brunswick, New Jersey 08901, USA. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] Department of Anthropology and Center for Human Evolutionary Studies, Rutgers University, New Brunswick, New Jersey 08901, USA [3] Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA [3] Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] CNRS, UPR 2147, Dynamique de l'Evolution Humaine, 44 rue de l'Amiral Mouchez, 75014 Paris, France. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] CNRS, UMR 5199 PACEA, Universite de Bordeaux, 33615 Pessac, France. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA [3] Department of Sociology, Anthropology and Social Work, Seton Hall University, South Orange, New Jersey 07079, USA. ; 1] CNRS, UMR 5199 PACEA, Universite de Bordeaux, 33615 Pessac, France [2] Inrap, Centre Mixte de Recherche Archeologique, Domaine de Campagne, 24620 Campagne, France. ; CNRS, UMR 7055, Prehistoire et Technologie, Universite Paris Ouest Nanterre La Defense, 21 allee de l'Universite, 92023 Nanterre Cedex, France. ; 1] CNRS, UMR 7055, Prehistoire et Technologie, Universite Paris Ouest Nanterre La Defense, 21 allee de l'Universite, 92023 Nanterre Cedex, France [2] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] Inrap, 34-36 avenue Paul-Vaillant Couturier, 93120 La Courneuve, France. ; IPHEP, Institut de Paleoprimatologie, Paleontologie Humaine: Evolution et Paleoenvironnements, CNRS, UMR 7262, Universite de Poitiers, Bat. B35 - TSA 51106, 6 rue Michel Brunet, 86073 Poitiers Cedex 9, France. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] Aix-Marseille Universite, CNRS, MCC, UMR 7269, LAMPEA, 13094 Aix-en-Provence Cedex 2, France. ; Turkana Basin Institute, Stony Brook University, Stony Brook, New York 11794-4364, USA. ; Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA. ; West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya. ; 1] West Turkana Archaeological Project, P.O. Box 40658-00100, Ngara Rd, Nairobi, Kenya [2] National Museums of Kenya, Department of Earth Sciences, Archaeology Section, P.O. Box 40658-00100 Ngara Rd, Nairobi, Kenya. ; 1] Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA [2] Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25993961" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Archaeology ; Biological Evolution ; Environment ; Fossils ; History, Ancient ; *Hominidae ; Kenya ; Paleontology ; Technology/history ; Time Factors ; *Tool Use Behavior
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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