Abstract:
:The dynamics of a marine virus-host system were investigated at different steady state growth rates in chemostat cultures and the data were analyzed using a simple model. The virus-host interactions showed strong dependence on host cell growth rate. The duration of the infection cycle and the virus burst size were found to depend on bacterial growth rate, and the rate of cell lysis and virus production were positively correlated with steady state growth rate in the cultures (r(2) > 0.96, p < 0.05). At bacterial growth rates of 0.02 to 0.10 h(-1) in the chemostats the virus burst size increased from 12 +/- 4 to 56 +/- 4, and the latent period decreased from 2.0 to 1.7 h. Resistant clones of the host strain were present in the cultures from the beginning of the experiment and replaced the sensitive host cells following viral lysis in the cultures. Regrowth of resistant cells correlated significantly (r(2) = 1.000, p < 0.02) with the lysis rate of sensitive cells, indicating that release of viral lysates stimulated growth of the non-infected, resistant cells. The constructed model was suitable for simulating the observed dynamics of the sensitive host cells, viruses and resistant clones in the cultures. The model was therefore used in an attempt to predict the dynamics of this virus-host interaction in a natural marine environment during a certain set of growth conditions. The simulation indicated that a steady state relationship between the specific viruses and sensitive and resistant bacterial clones may occur at densities that are reasonable to assume for natural environments. The study demonstrates that basic characterization and modeling of specific virus-host interactions may improve our understanding of the behavior of bacteria and viruses in natural systems.
journal_name
Microb Ecoljournal_title
Microbial ecologyauthors
Middelboe Mdoi
10.1007/s002480000050keywords:
subject
Has Abstractpub_date
2000-08-01 00:00:00pages
114-124issue
2eissn
0095-3628issn
1432-184Xpii
10.1007/s002480000050journal_volume
40pub_type
杂志文章abstract::Although organic-aggregate-associated bacteria play a pivotal role in microbial food webs and in the cycling of major elements, their community composition and diversity have not been extensively studied, especially in shallow freshwater systems. This study is among the first to explore intra-lake horizontal heterogen...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-008-9482-8
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abstract::Freshwater wetlands constitute important ecosystems, and their benthic, attached microbial communities, including biofilms, represent key habitats that contribute to primary productivity, nutrient cycling, and substrate stabilization. In many wetland biofilms, algae constitute significant parts of the microbial popula...
journal_title:Microbial ecology
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abstract::Marine sponges often harbor photosynthetic symbionts that may enhance host metabolism and ecological success, yet little is known about the factors that structure the diversity, specificity, and nature of these relationships. Here, we characterized the cyanobacterial symbionts in two congeneric and sympatric host spon...
journal_title:Microbial ecology
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF00166823
更新日期:1994-09-01 00:00:00
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journal_title:Microbial ecology
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abstract::Scleractinian corals form the framework of coral reefs and host abundant and diverse microbial communities that are fundamental to their success. A very limited number of studies have examined the co-occurrence of multiple partners within the coral 'holobiont' and their pattern of specificity over different geographic...
journal_title:Microbial ecology
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-006-9009-0
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journal_title:Microbial ecology
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s002489900153
更新日期:1999-07-01 00:00:00
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s002489900180
更新日期:2000-01-01 00:00:00
abstract::Genetic diversification through the emergence of variants is one of the known mechanisms enabling the adaptation of bacterial communities. We focused in this work on the adaptation of the model strain Pseudomonas putida KT2440 in association with another P. putida strain (PCL1480) recently isolated from soil to invest...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-019-01470-z
更新日期:2020-07-01 00:00:00
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-004-0212-6
更新日期:2004-11-01 00:00:00
abstract::Deep sequencing of prokaryotic 16S rDNA regularly reveals thousands of microbial species thriving in many common habitats. It is still unknown how this huge microbial diversity, including many potentially competing organisms, may persist at a single site. One of plausible hypotheses is that a large number of spatially...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-016-0760-6
更新日期:2016-07-01 00:00:00
abstract::Rates of leaf litter decomposition in streams are strongly influenced both by inorganic nutrients dissolved in stream water and by litter traits such as lignin, nitrogen (N) and phosphorus (P) concentrations. As a result, decomposition rates of different leaf species can show contrasting responses to stream nutrient e...
journal_title:Microbial ecology
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doi:10.1007/s00248-019-01353-3
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-018-1160-x
更新日期:2018-10-01 00:00:00
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journal_title:Microbial ecology
pub_type: 杂志文章
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-015-0637-0
更新日期:2015-11-01 00:00:00
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journal_title:Microbial ecology
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doi:10.1007/BF02010484
更新日期:1985-06-01 00:00:00
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-016-0735-7
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journal_title:Microbial ecology
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journal_title:Microbial ecology
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abstract::Commensal bacteria influence many aspects of an organism's behaviour. However, studies on the influence of commensal bacteria in insect mate-selection are scarce. Here, we present empirical evidence that commensal bacteria mediate mate-selection in the Oriental fruit fly, Bactrocera dorsalis. Male flies were attracted...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-016-0819-4
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abstract::Bulbous rush (Juncus bulbosus) is a pioneer species in acidic, iron-rich, coal mining lakes in the eastern part of Germany. Juncus roots are coated with iron plaques, and it has been suggested that microbial processes under the iron plaques might be supportive for Juncus plant growth. The objectives of this work were ...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-002-1054-8
更新日期:2003-10-01 00:00:00
abstract::Since 2008, the kiwifruit industry has been devastated by a pandemic outbreak of Pseudomonas syringae pv. actinidiae (Psa), the causal agent of bacterial canker. This disease has become the most significant limiting factor in kiwifruit production. Psa colonizes different organs of the host plant, causing a specific sy...
journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-019-01459-8
更新日期:2020-07-01 00:00:00
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journal_title:Microbial ecology
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doi:10.1007/s00248-009-9536-6
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/s00248-012-0016-z
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journal_title:Microbial ecology
pub_type: 杂志文章
doi:10.1007/BF02011647
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journal_title:Microbial ecology
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doi:10.1007/s00248-004-0256-7
更新日期:2005-02-01 00:00:00