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  1. #1
    Join Date
    Jan 2010
    Location
    Alachua County, FL, USA
    Posts
    6,928

    Default Honeybee Response to Nosema ceranae and Insecticides

    Transcriptome Analyses of the Honeybee Response to Nosema ceranae and Insecticides
    Honeybees (Apis mellifera) are constantly exposed to a wide variety of environmental stressors such as parasites and pesticides. Among them, Nosema ceranae and neurotoxic insecticides might act in combination and lead to a higher honeybee mortality. We investigated the molecular response of honeybees exposed to N. ceranae, to insecticides (fipronil or imidacloprid), and to a combination of both stressors. Midgut transcriptional changes induced by these stressors were measured in two independent experiments combining a global RNA-Seq transcriptomic approach with the screening of the expression of selected genes by quantitative RT-PCR. Although N. ceranae-insecticide combinations induced a significant increase in honeybee mortality, we observed that they did not lead to a synergistic effect. According to gene expression profiles, chronic exposure to insecticides had no significant impact on detoxifying genes but repressed the expression of immunity-related genes. Honeybees treated with N. ceranae, alone or in combination with an insecticide, showed a strong alteration of midgut immunity together with modifications affecting cuticle coatings and trehalose metabolism. An increasing impact of treatments on gene expression profiles with time was identified suggesting an absence of stress recovery which could be linked to the higher mortality rates observed.
    http://www.plosone.org/article/info%...l.pone.0091686
    americasbeekeeper.com
    beekeeper@americasbeekeeper.com

  2. #2
    Join Date
    Jul 2013
    Location
    Morro Bay, California, USA
    Posts
    841

    Default Re: Honeybee Response to Nosema ceranae and Insecticides

    Do you have your accumulated abstracts organized into some sort of Endnote or BibTex database?
    I find your "abstract service" really useful, wish I could access all the references.

  3. #3
    Join Date
    May 2013
    Location
    Tallahassee, Florida, USA
    Posts
    11

    Default Re: Honeybee Response to Nosema ceranae and Insecticides

    I find them very useful too, thanks!

  4. #4
    Join Date
    Jul 2010
    Location
    Auckland,Auckland,New Zealand
    Posts
    5,996

    Default Re: Honeybee Response to Nosema ceranae and Insecticides

    2nd to last line in your quote "An increasing impact of treatments", are they referring to treatments of either N ceranae or insecticide, or are they referring to mite treatments.
    44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).

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