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  • 1
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    Transgenerational epigenetic instability is a source of novel methylation variants (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-09-17
    Description: Epigenetic information, which may affect an organism's phenotype, can be stored and stably inherited in the form of cytosine DNA methylation. Changes in DNA methylation can produce meiotically stable epialleles that affect transcription and morphology, but the rates of spontaneous gain or loss of DNA methylation are unknown. We examined spontaneously occurring variation in DNA methylation in Arabidopsis thaliana plants propagated by single-seed descent for 30 generations. We identified 114,287 CG single methylation polymorphisms and 2485 CG differentially methylated regions (DMRs), both of which show patterns of divergence compared with the ancestral state. Thus, transgenerational epigenetic variation in DNA methylation may generate new allelic states that alter transcription, providing a mechanism for phenotypic diversity in the absence of genetic mutation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3210014/" 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/PMC3210014/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schmitz, Robert J -- Schultz, Matthew D -- Lewsey, Mathew G -- O'Malley, Ronan C -- Urich, Mark A -- Libiger, Ondrej -- Schork, Nicholas J -- Ecker, Joseph R -- F32 HG004830/HG/NHGRI NIH HHS/ -- F32 HG004830-01/HG/NHGRI NIH HHS/ -- F32 HG004830-02/HG/NHGRI NIH HHS/ -- F32 HG004830-03/HG/NHGRI NIH HHS/ -- F32-HG004830/HG/NHGRI NIH HHS/ -- R01 HG003523/HG/NHGRI NIH HHS/ -- R01 HG003523-01/HG/NHGRI NIH HHS/ -- R01 HG003523-02/HG/NHGRI NIH HHS/ -- R01 HG003523-03/HG/NHGRI NIH HHS/ -- UL1 RR025774/RR/NCRR NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Oct 21;334(6054):369-73. doi: 10.1126/science.1212959. Epub 2011 Sep 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plant Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21921155" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Arabidopsis/*genetics/metabolism ; *DNA Methylation ; DNA Transposable Elements ; DNA, Intergenic ; DNA, Plant/genetics/metabolism ; Dinucleoside Phosphates/metabolism ; *Epigenesis, Genetic ; Genes, Plant ; Genetic Variation ; Genome, Plant ; Linear Models ; Mutation ; Polymorphism, Genetic ; Promoter Regions, Genetic ; Transcription, Genetic
    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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    Epipelagic fish distributions in relation to thermal fronts in a coastal upwelling system using high-resolution remote-sensing techniques (2011)
    Oxford University Press
    Details
    Publication Date: 2011-11-24
    Description: Reese, D. C., O'Malley, R. T., Brodeur, R. D., and Churnside, J. H. 2011. Epipelagic fish distributions in relation to thermal fronts in a coastal upwelling system using high-resolution remote-sensing techniques. – ICES Journal of Marine Science, 68: 1865–1874. Coastal upwelling systems are characterized by substantial spatial and temporal variability with respect to surface conditions, with fauna patchily distributed and high abundances in localized areas. Examining habitat associations on finer spatial scales than previous studies have been able to achieve would advance the understanding of important marine coastal ecosystems. This study evaluates the spatial and temporal relationships of single fish and fish schools with sea surface temperature (SST) fronts in the northern California Current upwelling system, using lidar (light detection and ranging) from an aircraft to sample surface waters over the continental shelf. High-resolution data were collected on the distribution of surface nekton and SST, then the locations of fish were analysed with respect to their proximity to SST fronts using GIS spatial analyses. Both fish schools and solitary fish were located significantly closer to fronts than would be expected by chance. The association of fish to fronts varied with the progression of the upwelling season such that fish associated less with fronts under stronger upwelling conditions. The relationships observed indicate the importance of thermal features to fish as a habitat component in a variable upwelling environment and have implications for management and conservation.
    Print ISSN: 1054-3139
    Electronic ISSN: 1095-9289
    Topics: Biology , Geosciences , Physics
    Published by Oxford University Press
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