MURAL - Maynooth University Research Archive Library



    Heterorhabditis, Steinernema and their bacterial symbionts - lethal pathogens of insects


    Burnell, Ann M. and Stock, S. Patricia (2000) Heterorhabditis, Steinernema and their bacterial symbionts - lethal pathogens of insects. Nematology, 2 (1). pp. 31-42.

    [img] Download (226kB)


    Share your research

    Twitter Facebook LinkedIn GooglePlus Email more...



    Add this article to your Mendeley library


    Abstract

    The entomopathogenic nematodes (EPN) Heterorhabditis and Steinernema together with their symbiont bacteria Photorhabdus and Xenorhabdus, respectively, are obligate and lethal parasites of insects. EPN can provide effective biological control of some important lepidopteran, dipteran and coleopteran pests of commercial crops and they are amenable to large-scale culture in liquid fermentors. They are unique among rhabditids in having a symbiotic relationshipwith an enteric bacterium species. The bacterial symbiont is required to kill the insect host and to digest the host tissues, thereby providing suitable nutrient conditions for nematode growth and development. This review describes the general biology of EPN and their symbionts and gives an overview of studies to date on EPN biodiversity, biogeography and phylogeny. The impetus for research in EPN and their symbionts has come about because of their biological control potential, with much of the focus in EPN research having been on applied aspects relating to pest control. However EPN and their symbionts are increasinglybeing viewed as exciting subjects for basic research in the areas of ecology, biodiversity, evolution, biochemistry, symbiosis and molecular genetics. Much progress has been made over the past 20 years in our understanding of the basic biology and genetics of EPN and their symbionts. We are now entering a new phase in which the tools of molecular genetics are being increasingly used to address a range of biological questions in EPN research. The knowledge gained from this endeavour should ensure that EPN will become even more effective biopesticides and should also ensure that EPN and their symbionts gain prominence as unique and intrinsically interesting biological systems.

    Item Type: Article
    Keywords: Biogeography; entomopathogenic nematode; habitat preference; Photorhabdus; phylogeny; symbiosis; Xenorhabdus;
    Academic Unit: Faculty of Science and Engineering > Biology
    Item ID: 177
    Depositing User: Prof. Ann Burnell
    Date Deposited: 10 Jan 2005
    Journal or Publication Title: Nematology
    Publisher: Koninklijke Brill NV.
    Refereed: Yes
    URI:

      Repository Staff Only(login required)

      View Item Item control page

      Downloads

      Downloads per month over past year