Insecticidal Toxins from the Photorhabdus and Xenorhabdus Bacteria
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چکیده
منابع مشابه
Insecticidal Toxins from the Photorhabdus and Xenorhabdus Bacteria
Insect pathogens are an excellent source of novel insecticidal agents with proven toxicity. In particular, bacteria from the genera Photorhabdus and Xenorhabdus are proving to be a genomic goldmine, encoding a multitude of insecticidal toxins. Some are highly specific in their target species, whilst others are more generalist, but all are of potential use in crop protection against insect pests...
متن کاملTxp40, a ubiquitous insecticidal toxin protein from Xenorhabdus and Photorhabdus bacteria.
Xenorhabdus and Photorhabdus are gram-negative bacteria that produce a range of proteins that are toxic to insects. We recently identified a novel 42-kDa protein from Xenorhabdus nematophila that was lethal to the larvae of insects such as Galleria mellonella and Helicoverpa armigera when it was injected at doses of 30 to 40 ng/g larvae. In the present work, the toxin gene txp40 was identified ...
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Xenorhabdus and Photorhabdus are members of the family Enterobacteriaceae, and are engaged in a mutualistic association with the entomopathogenic nematodes, Steinernema and Heterorhabditis, respectively. In the present study, the organic fraction of ethyl acetate bacterial crude extracts of the symbiotic bacteria, Xenorhabdus stockiae and Photorhabdus luminescens isolated from entomopathogenic ...
متن کاملInsecticidal toxins from the bacterium Photorhabdus luminescens: gene cloning and toxin histopathology
Four toxin complexes, Tca, Tcb, Tcc and Tcd from the culture broth of Photorhabdus luminescens have been puri®ed and the four toxin complex encoding loci, tca, tcb, tcc and tcd, cloned. Genetic knockout of either tca or tcd reduced oral toxicity to Manduca sexta, and knockout of both loci eliminated activity. Puri®ed Tca speci®cally affected the insect midgut, despite its putative normal delive...
متن کاملantibacterial activities of extracellular metabolites of symbiotic bacteria, xenorhabdus and photorhabdus isolated from entomopathogenic nematodes
xenorhabdus and photorhabdus are members of the family enterobacteriaceae, and are engaged in a mutualistic association with the entomopathogenic nematodes, steinernema and heterorhabditis, respectively. in the present study, the organic fraction of ethyl acetate bacterial crude extracts of the symbiotic bacteria, xenorhabdus stockiae and photorhabdus luminescens isolated from entomopathogenic ...
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ژورنال
عنوان ژورنال: The Open Toxinology Journal
سال: 2013
ISSN: 1875-4147
DOI: 10.2174/1875414701003010101