Host range of a parasitoid wasp is linked to host susceptibility to its mutualistic viral symbiont.

Autor: Coffman KA; Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, Tennessee, USA., Kauwe AN; USDA-ARS Daniel K. Inouye US Pacific Basin Agricultural Research Center, Hilo, Hawaii, USA., Gillette NE; USDA-ARS Daniel K. Inouye US Pacific Basin Agricultural Research Center, Hilo, Hawaii, USA.; College of Agriculture, Forestry and Natural Resource Management, University of Hawai'i at Hilo, Hilo, Hawaii, USA., Burke GR; Department of Entomology, University of Georgia, Athens, Georgia, USA., Geib SM; USDA-ARS Daniel K. Inouye US Pacific Basin Agricultural Research Center, Hilo, Hawaii, USA.
Jazyk: angličtina
Zdroj: Molecular ecology [Mol Ecol] 2024 Sep; Vol. 33 (17), pp. e17485. Date of Electronic Publication: 2024 Jul 30.
DOI: 10.1111/mec.17485
Abstrakt: Parasitoid wasps are one of the most species-rich groups of animals on Earth, due to their ability to successfully develop as parasites of nearly all types of insects. Unlike most known parasitoid wasps that specialize towards one or a few host species, Diachasmimorpha longicaudata is a generalist that can survive within multiple genera of tephritid fruit fly hosts, including many globally important pest species. Diachasmimorpha longicaudata has therefore been widely released to suppress pest populations as part of biological control efforts in tropical and subtropical agricultural ecosystems. In this study, we investigated the role of a mutualistic poxvirus in shaping the host range of D. longicaudata across three genera of agricultural pest species: two of which are permissive hosts for D. longicaudata parasitism and one that is a nonpermissive host. We found that permissive hosts Ceratitis capitata and Bactrocera dorsalis were highly susceptible to manual virus injection, displaying rapid virus replication and abundant fly mortality. However, the nonpermissive host Zeugodacus cucurbitae largely overcame virus infection, exhibiting substantially lower mortality and no virus replication. Investigation of transcriptional dynamics during virus infection demonstrated hindered viral gene expression and limited changes in fly gene expression within the nonpermissive host compared with the permissive species, indicating that the host range of the viral symbiont may influence the host range of D. longicaudata wasps. These findings also reveal that viral symbiont activity may be a major contributor to the success of D. longicaudata as a generalist parasitoid species and a globally successful biological control agent.
(© 2024 The Author(s). Molecular Ecology published by John Wiley & Sons Ltd. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.)
Databáze: MEDLINE
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