λ Lysogens of E. coli reproduce more rapidly than non-lysogens

Edlin, Gordon; Lin, Leo; Kudrna, R

doi:10.1038/255735a0

Cited by 101 publications

(55 citation statements)

References 3 publications

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“…80 In addition, E. coli lysogens of laboratory phages, P1, P2, lambda and Mu exhibit a higher metabolic activity and faster growth rate than non-lysogenic counterparts. 81,82 "Kill-the-relatives" dynamics was aptly observed when spontaneous prophage induction in a few lysogenic cells within Salmonella co-cultures was shown to enhance the competitive fitness of the lysogen as a whole, ensuring the maintenance and spread of viral DNA. 83 The biological proteins, nucleic acids and lipids.…”

Section: Phage-host Dynamics In the Intestine: Ecological Assumptionsmentioning

confidence: 99%

Movers and shakers

et al. 2013

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Section: Phage-host Dynamics In the Intestine: Ecological Assumptionsmentioning

confidence: 99%

Movers and shakers

et al. 2013

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“…When grown in glucose-limited chemostats, lysogens of phages P1, P2, lambda, and Mu all demonstrated higher metabolic activity, faster growth, and extended growth phase than did nonlysogens (77,78,165). In the case of lambda lysogens, increased reproductive fitness was also noted for growth substrates, such as glycerol, lactate, and acetate (78).…”

mentioning

confidence: 99%

Virioplankton: Viruses in Aquatic Ecosystems

Wommack

Colwell

2000

Microbiol Mol Biol Rev

1,872

108

1,620

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SUMMARY The discovery that viruses may be the most abundant organisms in natural waters, surpassing the number of bacteria by an order of magnitude, has inspired a resurgence of interest in viruses in the aquatic environment. Surprisingly little was known of the interaction of viruses and their hosts in nature. In the decade since the reports of extraordinarily large virus populations were published, enumeration of viruses in aquatic environments has demonstrated that the virioplankton are dynamic components of the plankton, changing dramatically in number with geographical location and season. The evidence to date suggests that virioplankton communities are composed principally of bacteriophages and, to a lesser extent, eukaryotic algal viruses. The influence of viral infection and lysis on bacterial and phytoplankton host communities was measurable after new methods were developed and prior knowledge of bacteriophage biology was incorporated into concepts of parasite and host community interactions. The new methods have yielded data showing that viral infection can have a significant impact on bacteria and unicellular algae populations and supporting the hypothesis that viruses play a significant role in microbial food webs. Besides predation limiting bacteria and phytoplankton populations, the specific nature of virus-host interaction raises the intriguing possibility that viral infection influences the structure and diversity of aquatic microbial communities. Novel applications of molecular genetic techniques have provided good evidence that viral infection can significantly influence the composition and diversity of aquatic microbial communities.

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“…Lysogeny is characterized by two distinct phases that could influence the BCC with contrasting outcomes. The establishment of lysogeny confers immunity against infection by the same or closely related phages, and prophages can also change the growth properties of their host (Levin and Lenski, 1983;Marsh and Wellington, 1994), generally leading to the increase in their abundance (Edlin et al, 1975;Paul, 2008). Here, we propose that these benefits of lysogeny also exist within natural bacterioplankton, probably conferring a selective advantage to some groups that will eventually become abundant in the community.…”

Section: Changes In Bcc Upon Induction and Ecological Considerationsmentioning

confidence: 83%

Disentangling the relative influence of bacterioplankton phylogeny and metabolism on lysogeny in reservoirs and lagoons

et al. 2010

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Previous studies indicate that lysogeny is preponderant when environmental conditions are challenging for the bacterial communities and when their metabolism is reduced. Furthermore, it appears that lysogeny is more frequent within certain bacterial phylogenetic groups. In this comparative study from 10 freshwater reservoirs and 10 coastal lagoons, we aim to disentangle the influence of these different factors. In eight reservoirs and four lagoons, lysogeny was detected by induction assays with mitomycin C, and induction significantly modified the bacterial community composition (BCC), whereas community composition remained constant in ecosystems in which lysogeny was not observed. Among the phylogenetic groups studied, the most abundant ones were Bacteroidetes and a-proteobacteria in lagoons, and b-proteobacteria and Bacteroidetes in reservoirs. These dominant groups comprised the highest proportions of inducible lysogens. In order to unravel the effects of bacterial metabolism from phylogeny on lysogeny, we measured bacterial community physiology and the specific activities of selected phylogenetic groups. The proportion of inducible lysogens within the a-and the b-proteobacteria decreased with increasing group-specific metabolism in lagoons and reservoirs, respectively. In contrast, this relationship was not observed for the other lysogen-containing groups. Hence, both host physiology and phylogeny are critical for the establishment of lysogeny. This study illustrates the importance of lysogeny among the most abundant phylogenetic groups, and further suggests its strong structuring impact on BCC.

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λ Lysogens of E. coli reproduce more rapidly than non-lysogens

Cited by 101 publications

References 3 publications

Movers and shakers

Movers and shakers

Virioplankton: Viruses in Aquatic Ecosystems

Disentangling the relative influence of bacterioplankton phylogeny and metabolism on lysogeny in reservoirs and lagoons

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