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  • Processing and functional diversity of plant microRNA

    Creator:
    Cuperus, Josh
    Abstract:
    RNA interference pathways can involve amplification of secondary siRNAs by RNA-dependent RNA polymerases. In plants, RDR6-dependent secondary siRNAs, including transacting siRNAs (tasiRNAs), arise from transcripts targeted by some microRNAs (miRNAs). In the case of TAS3 tasiRNA formation, ARGONAUTE7 (AGO7)-miR390 complexes interact with primary transcripts at two sites, resulting in recruitment...
    Resource Type:
    Dissertation
    Full Text:
    ; Brodersen et al., 2008; Dugas and Bartel, 2008). Furthermore, the extent to which both mechanisms act may

  • Origins and evolution of plant microRNA genes

    Creator:
    Fahlgren, Noah
    Abstract:
    Eukaryotic small RNA (~20-30 nucleotides) are diverse regulatory molecules that repress gene expression at the transcriptional and post-transcriptional levels, defend hosts against invading viruses and defend genomes against selfish DNA elements. Small RNA populations are studied by high-throughput sequencing of the total small RNA fraction isolated from cells, however, the...
    Resource Type:
    Dissertation
    Full Text:
    translation initiation or elongation (Brodersen et al., 2008; Lanet et al., 2009). Animal miRNA are

  • Early self-sorting behavior in Chinook salmon is correlated with variation in growth, behavior and morphology later in life.

    Creator:
    Unrein, Julia R.
    Abstract:
    Juvenile Chinook salmon (Oncorhynchus tshawytscha) exhibit an array of life history tactics in Oregon's Willamette River Basin, yet we do not know to what extent it is driven by phenotypic plasticity or whether it is predetermined and how conditions in the early rearing environment may affect phenotype expression. We have...
    Resource Type:
    Masters Thesis
    Full Text:
    .-A., Nilsson, J.-Å., Brodersen, J., Anders Nilsson, P., Skov, C., and Brönmark, C. (2011). To

  • The Influence of Prey Predictability on the Foraging Behavior and Movement of Intertidal Predators

    Creator:
    Hennessey, Shannon M.
    Abstract:
    Fluctuations and spatial heterogeneity of habitat and resources is thought to underlie niche variation in animal populations, with intraspecific differences serving to produce or maintain population-, community-, or ecosystem-level patterns. Individual diet variation, defined as individual variation in food resource use within a population that is consistent over time, is...
    Resource Type:
    Dissertation

  • Rapid evolution of post-transcriptionally regulated RESTORER OF FERTILITY-LIKE genes in the genus Arabidopsis

    Creator:
    Jogdeo, Sanjuro
    Abstract:
    The Pentatricopeptide Repeat (PPR) gene family produces RNA-binding proteins that target organellar transcripts. The PPR family is expanded in land plants, with nearly 450 genes identified in Arabidopsis thaliana. In plants with a Cytoplasmic Male Sterility (CMS) phenotype, members of the PPR family can act as a RESTORER OF FERTILITY...
    Resource Type:
    Masters Thesis
    Full Text:
    repression (Hammond et al., 2000; Llave et al., 2002; Lanet et al., 2009; Brodersen et al., 2008

  • Endogenous and antiviral RNA silencing pathways in Arabidopsis

    Creator:
    Chapman, Elisabeth J.
    Abstract:
    RNA silencing pathways are required for a wide variety of processes in most eucaryotes. In plants, small-interfering RNA (siRNA) arising from transposons and other repetitive sequences is associated with heterochromatin formation and maintenance. MicroRNAs and trans-acting siRNAs encoded at discrete loci function as negative regulators of gene expression by triggering...
    Resource Type:
    Dissertation