Characterization of Tn 5 -Induced Mutants of Xenorhabdus nematophilus ATCC 19061
نویسندگان
چکیده
منابع مشابه
Transformation of Xenorhabdus nematophilus.
The ability of Xenorhabdus nematophilus 19061/1 to be transformed by pHK17 plasmid DNA was studied and optimized. A number of factors, including culture conditions, stage of growth, transformation buffer pH, cation type and concentration required for the production of competency, washing, heat shock conditions, and cell-DNA ratio, were found to affect transformation significantly. On the basis ...
متن کاملLysogeny and bacteriocinogeny in Xenorhabdus nematophilus and other Xenorhabdus spp.
Induction by mitomycin or high-temperature treatment resulted in the production of bacteriocins and phages in both phases of Xenorhabdus nematophilus A24, indicating lysogeny. Phage DNA purified from X. nematophilus A24 hybridized to several fragments of DraI-digested A24 chromosomal DNA, confirming that the phage genome was incorporated into the bacterial chromosome. Bacteriocins and phages we...
متن کاملIsolation and entomotoxic properties of the Xenorhabdus nematophilus F1 lecithinase.
Xenorhabdus spp. and Photorhabdus spp., entomopathogenic bacteria symbiotically associated with nematodes of the families Steinernematidae and Heterorhabditidae, respectively, were shown to produce different lipases when they were grown on suitable nutrient agar. Substrate specificity studies showed that Photorhabdus spp. exhibited a broad lipase activity, while most of the Xenorhabdus spp. sec...
متن کاملInteractions of insecticidal toxin gene products from Xenorhabdus nematophilus PMFI296.
Four genes on a genomic fragment from Xenorhabdus nematophilus PMFI296 were shown to be involved in insecticidal activity towards three commercially important insect species. Each gene was expressed individually and in combinations in Escherichia coli, and the insecticidal activity of the lysates was determined. The combined four genes (xptA1, xptA2, xptB1, and xptC1), in E. coli, showed activi...
متن کاملGrowth and Virulence of Steinernema glaseri Influenced by Different Subspecies of Xenorhabdus nematophilus.
Three Xenorhabdus nematophilus subspecies influenced Steinernema glaseri growth profiles and growth rates, but this was not necessarily because of different bacterial growth rates. Virulence of dauer nematodes in larval Galleria mellonella varied with the number of dauers retaining bacteria and the bacterial subspecies. Virulence was least for dauers grown on X. nematophilus subsp. bovienii bec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1991
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.57.4.1173-1180.1991