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United States Department of Agriculture

Agricultural Research Service

Title: Toxicity of 4 Serratia Marcescens Bacterial Strains Toward C. Elegans N2, Pgp-3 and Other Nematodes Is Inversely Related to Pigment

item Carta, Lynn

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: April 22, 1998
Publication Date: N/A

Technical Abstract: We are testing a number of biocontrol bacteria (eg. Burkholderia, Pseudomonas and Stenotrophomonas) for toxicity to bacterial feeding nematodes including C. elegans N2 and pgp-3. Serratia marcescens in particular had a measurable effect on number of eggs over 24 hours and relative motility in microtiter wells. Serratia marcescens strains with increasing amounts of red pigmentation (BF1-5@ (albino), D1, N4-5, NIMA) were tested for relative motility to C. elegans N2, pgp-3, Oscheius myriophila DF5020, Panagrellus redivivus PS1163, Mesorhabditis sp. PS1170 and Zeldia punctata PS1153. Toxicity directly increases with decreasing amount of pigment in Caenorhabditis, Oscheius and Panagrellus. The order of relative toxicity is reversed for the 2 highly pigmented strains and the 2 least pigmented strains (2143 vs. 1234) in Mesorhabditis and Zeldia. These nematodes are phylogenetically distant from C. elegans. Bacterial strains were provided by Phyllis Martin and Dan Roberts, USDA.

Last Modified: 4/19/2015