10 research outputs found

    Appendix A. Recorded plantings of the Hawaii Division of Forestry from 1910 to 1960 on the forest reserves of the lower Puna District, Hawaii Island.

    No full text
    Recorded plantings of the Hawaii Division of Forestry from 1910 to 1960 on the forest reserves of the lower Puna District, Hawaii Island

    Appendix E. The number of pixels and average aboveground C of individual lava flows across the various Forest Reserves of the Puna District of Hawaii Island.

    No full text
    The number of pixels and average aboveground C of individual lava flows across the various Forest Reserves of the Puna District of Hawaii Island

    Appendix C. Species-specific and general diameter-to-height models used to estimate height of common native and nonnative trees in Hawaii.

    No full text
    Species-specific and general diameter-to-height models used to estimate height of common native and nonnative trees in Hawaii

    Activated entomopathogenic nematode infective juveniles release lethal venom proteins

    Get PDF
    <div><p>Entomopathogenic nematodes (EPNs) are unique parasites due to their symbiosis with entomopathogenic bacteria and their ability to kill insect hosts quickly after infection. It is widely believed that EPNs rely on their bacterial partners for killing hosts. Here we disproved this theory by demonstrating that the <i>in vitro</i> activated infective juveniles (IJs) of <i>Steinernema carpocapsae</i> (a well-studied EPN species) release venom proteins that are lethal to several insects including <i>Drosophila melanogaster</i>. We confirmed that the <i>in vitro</i> activation is a good approximation of the <i>in vivo</i> process by comparing the transcriptomes of individual <i>in vitro</i> and <i>in vivo</i> activated IJs. We further analyzed the transcriptomes of non-activated and activated IJs and revealed a dramatic shift in gene expression during IJ activation. We also analyzed the venom proteome using mass spectrometry. Among the 472 venom proteins, proteases and protease inhibitors are especially abundant, and toxin-related proteins such as Shk domain-containing proteins and fatty acid- and retinol-binding proteins are also detected, which are potential candidates for suppressing the host immune system. Many of the venom proteins have conserved orthologs in vertebrate-parasitic nematodes and are differentially expressed during IJ activation, suggesting conserved functions in nematode parasitism. In summary, our findings strongly support a new model that <i>S</i>. <i>carpocapsae</i> and likely other <i>Steinernema</i> EPNs have a more active role in contributing to the pathogenicity of the nematode-bacterium complex than simply relying on their symbiotic bacteria. Furthermore, we propose that EPNs are a good model system for investigating vertebrate- and human-parasitic nematodes, especially regarding the function of excretory/secretory products.</p></div
    corecore