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- Title
Size-dependent Catalysis of <italic>Chlorovirus</italic> Population Growth by A Messy Feeding Predator.
- Authors
DeLong, John P.; Al-Ameeli, Zeina; Lyon, Shelby; Van Etten, James L.; Dunigan, David D.
- Abstract
Many chloroviruses replicate in endosymbiotic zoochlorellae that are protected from infection by their symbiotic host. To reach the high virus concentrations that often occur in natural systems, a mechanism is needed to release zoochlorellae from their hosts. We demonstrate that the ciliate predator <italic>Didinium nasutum</italic> foraging on zoochlorellae-bearing <italic>Paramecium bursaria</italic> can release live zoochlorellae from the ruptured prey cell that can then be infected by chloroviruses. The catalysis process is very effective, yielding roughly 95% of the theoretical infectious virus yield as determined by sonication of <italic>P. bursaria</italic>. <italic>Chlorovirus</italic> activation is more effective with smaller <italic>Didinia</italic>, as larger <italic>Didinia</italic> typically consume entire <italic>P. bursaria</italic> cells without rupturing them, precluding the release of zoochlorellae. We also show that the timing of <italic>Chlorovirus</italic> growth is tightly linked to the predator-prey cycle between <italic>Didinium</italic> and <italic>Paramecium</italic>, with the most rapid increase in chloroviruses temporally linked to the peak foraging rate of <italic>Didinium</italic>, supporting the idea that predator-prey cycles can drive cycles of <italic>Chlorovirus</italic> abundance.
- Subjects
PREDATION; PARAMECIUM aurelia; PARAMECIUM; MOLECULAR biology; SPECIES diversity; MICROORGANISMS
- Publication
Microbial Ecology, 2018, Vol 75, Issue 4, p847
- ISSN
0095-3628
- Publication type
Article
- DOI
10.1007/s00248-017-1106-8