Influence of earthworm activity on gene transfer from Pseudomonas fluorescens to indigenous soil bacteria
Article Abstract:
Earthworms increase the spread of the plasmid pJP4 from innoculated Pseudomonas fluorescens to indigenous soil bacteria. The number of soil transconjugants increase in microcosms with the earthworm species Lumbricus rubellus and Aporrectodea trapezoides. The diversity of the bacterial transconjugants and the vertical distribution of donor and transconjugant bacteria increases in the presence of the earthworms. The depth to which the bacteria spread depends on the burrowing habit of the earthworms. The earthworm casts and cocoons contain the donor and transconjugate bacteria.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Transmission of nephridial bacteria of the Earth worm Eisenia Fetida
Article Abstract:
Evidence based on curing experiments in situ hybridizations with Acidovorax-specific probes and 16S RNA gene sequence analysis is presented to show that egg capsules contain high numbers of the bacterial symbiont and that juveniles are colonized during development within the egg capsule. It was observed that there is a developmental stage of the embryo of the earthworm Eisenia Fetida within the egg capsule that ensures specific colonization.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2006
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Presence of culturable bacteria in cocoons of the earthworm Eisenia fetida
Article Abstract:
The developing embryos in egg capsules (cocoons) of the earthworm Eisenia fetida contain viable bacteria. The appearance in cocoons of selected bacteria added to worm breeding microcosms is documented by the use of immunofluorescence and antibiotic marking techniques. Inoculation of selected bacterial isolates in the worm growth environment affects the bacterial complement of Eisenia fetida cocoons.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1993
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