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Transcriptomics of host-specific interactions in natural populations of the parasitic plant purple witchweed (Striga hermonthica)

dc.contributor.authorLopez, L.
dc.contributor.authorBellis, E.S.
dc.contributor.authorWafula, E.
dc.contributor.authorHearne, S.
dc.contributor.authorHonaas, L.
dc.contributor.authorRalph, P.E.
dc.contributor.authorTimko, M.P.
dc.contributor.authorUnachukwu, N.
dc.contributor.authordePamphilis, C.W.
dc.contributor.authorLasky, J.R.
dc.date.accessioned2022-08-08T08:08:04Z
dc.date.available2022-08-08T08:08:04Z
dc.date.issued2019-07
dc.identifier.citationLopez, L., Bellis, E.S., Wafula, E., Hearne, S.J., Honaas, L., Ralph, P.E., ... & Lasky, J.R. (2019). Transcriptomics of host-specific interactions in natural populations of the parasitic plant purple witchweed (Striga hermonthica). Weed Science, 67(4), 397-411.
dc.identifier.issn0043-1745
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7611
dc.description.abstractHost-specific interactions can maintain genetic and phenotypic diversity in parasites that attack multiple host species. Host diversity, in turn, may promote parasite diversity by selection for genetic divergence or plastic responses to host type. The parasitic weed purple witchweed [Striga hermonthica (Delile) Benth.] causes devastating crop losses in sub-Saharan Africa and is capable of infesting a wide range of grass hosts. Despite some evidence for host adaptation and host-by-Striga genotype interactions, little is known about intraspecific Striga genomic diversity. Here we present a study of transcriptomic diversity in populations of S. hermonthica growing on different hosts (maize [Zea mays L.] vs. grain sorghum [Sorghum bicolor (L.) Moench]). We examined gene expression variation and differences in allelic frequency in expressed genes of aboveground tissues from populations in western Nigeria parasitizing each host. Despite low levels of host-based genome-wide differentiation, we identified a set of parasite transcripts specifically associated with each host. Parasite genes in several different functional categories implicated as important in host–parasite interactions differed in expression level and allele on different hosts, including genes involved in nutrient transport, defense and pathogenesis, and plant hormone response. Overall, we provide a set of candidate transcripts that demonstrate host-specific interactions in vegetative tissues of the emerged parasite S. hermonthica. Our study shows how signals of host-specific processes can be detected aboveground, expanding the focus of host–parasite interactions beyond the haustorial connection.
dc.format.extent397-411
dc.language.isoen
dc.subjectAllele Frequency
dc.subjectGene Expression
dc.subjectHost Parasite Relations
dc.subjectParasitic Plant
dc.subjectRNA Sequence
dc.subjectMaize
dc.subjectStriga Hermonthica
dc.titleTranscriptomics of host-specific interactions in natural populations of the parasitic plant purple witchweed (Striga hermonthica)
dc.typeJournal Article
cg.contributor.affiliationThe Pennsylvania State University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInternational Maize and Wheat Improvement Center
cg.contributor.affiliationUnited States Department of Agriculture
cg.contributor.affiliationUniversity of Virginia
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.identifier.bibtexciteidLOPEZ:2019
cg.isijournalISI Journal
cg.authorship.typesCGIAR and advanced research institute
cg.iitasubjectFood Security
cg.iitasubjectMaize
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.journalWeed Science
cg.notesPublished online: 10 June 2019
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1017/%20wsc.2019.20
cg.futureupdate.requiredNo
cg.identifier.issue4
cg.identifier.volume67


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