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Species-complex diversification and host-plant associations in Bemisia tabaci : a plant-defense, detoxification perspective revealed by RNAseq analyses

Species-complex diversification and host-plant associations in Bemisia tabaci : a plant-defense, detoxification perspective revealed by RNAseq analyses

Malka, Osnat, Santos-Garcia, Diego, Feldmesser, Ester, Sharon, Elad, Krause-Sakate, Renate, Delatte, Hélène, van Brunschot, Sharon ORCID: 0000-0002-9634-9463, Patel, Mitulkumar, Muhindira, Paul Visendi, Mugerwa, Habibu, Seal, Susan ORCID: 0000-0002-3952-1562, Colvin, John and Morin, Shai (2018) Species-complex diversification and host-plant associations in Bemisia tabaci : a plant-defense, detoxification perspective revealed by RNAseq analyses. Molecular Ecology, 27 (21). pp. 4241-4256. ISSN 0962-1083 (Print), 1365-294X (Online) (doi:https://doi.org/10.1111/mec.14865)

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Abstract

Insect‐plant associations and their role in diversification are mostly studied in specialists. Here, we aimed to identify macroevolution patterns in the relationships between generalists and their host plants that have the potential to promote diversification. We focused on the Bemisia tabaci species complex containing more than 35 cryptic species. Mechanisms for explaining this impressive diversification have focused so far on allopatric forces that assume a common, broad, host range. We conducted a literature survey which indicated that species in the complex differ in their host range, with only few showing a truly broad one. We then selected six species, representing different phylogenetic groups and documented host‐ranges. We tested if differences in the species expression profiles of detoxification genes, are shaped more by their phylogenetic relationships or by their ability to successfully utilize multiple hosts, including novel ones. Performance assays divided the six species into two groups of three, one showing higher performance on various hosts than the other (the lower‐performance group). The same grouping pattern appeared when the species were clustered according to their expression profiles. Only species placed in the lower‐performance group showed a tendency to lower the expression of multiple genes. Taken together, these findings bring evidence for the existence of a common detoxification “machinery”, shared between species that can perform well on multiple hosts. We raise the possibility that this “machinery” might have played a passive role in the diversification of complex, by allowing successful migration to new/novel environments, leading, in some cases, to fragmentation and speciation.

Item Type: Article
Additional Information: This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record.
Uncontrolled Keywords: Insect‐plant interactions; Species complex; Diversification; Host adaptation; Diet breadth; Bemisia tabaci
Subjects: S Agriculture > S Agriculture (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Last Modified: 13 May 2019 13:26
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: GREAT 4
URI: http://gala.gre.ac.uk/id/eprint/21805

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