Insect Control: Biological and Synthetic Agents - Index of

326 9: Insecticidal Toxins from Photorhabdus and Xenorhabdus
Figure 12 Comparison of supernatant (SN) versus cellassociated
oral toxicity for three different Photorhabdus strains.
Note that strain TT01 containing a complete copy of the tcd locus
has no oral toxicity associated with the bacterial supernatant
but does show oral toxicity associated with the bacterial cells
(see text for discussion).
they can still kill the insect host. Further, mutants
lacking mcf1 take a longer time to kill insects but
are still lethal. The current challenge is therefore
to dissect out the individual roles of each toxin gene,
even when they are members of large and rapidly
growing gene families.
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