期刊
BIOLOGY LETTERS
卷 10, 期 12, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsbl.2014.0680
关键词
parasitic manipulation; phototaxis; behavioural manipulation; baculovirus; caterpillars; tree-top disease
资金
- Program Strategic Alliances of the Royal Dutch Academy of Arts and Sciences [08-PSA-BD-01]
- VENI grant of the Netherlands Organisation for Scientific Research [863.11.017]
Many parasites manipulate host behaviour to enhance parasite transmission and survival. A fascinating example is baculoviruses, which often induce death in caterpillar hosts at elevated positions ('tree-top' disease). To date, little is known about the underlying processes leading to this adaptive host manipulation. Here, we show that the baculovirus Spodoptera exigua multiple nucleopolyhedrovirus (SeMNPV) triggers a positive phototactic response in S. exigua larvae prior to death and causes the caterpillars to die at elevated positions. This light-dependent climbing behaviour is specific for infected larvae, as movement of uninfected caterpillars during larval development was light-independent. We hypothesize that upon infection, SeMNPV captures a host pathway involved in phototaxis and/or light perception to induce this remarkable behavioural change.
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