Virus movement from infected sweetpotato vines to roots and reversion on root sprouts

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cg.authorship.typesCGIAR single centre
cg.contributor.affiliationMakerere University
cg.contributor.affiliationInternational Potato Center
cg.contributor.affiliationUniversity of Greenwich
cg.contributor.crpRoots, Tubers and Bananas
cg.coverage.countryUganda
cg.coverage.iso3166-alpha2UG
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.creator.identifierRobert Mwanga: 0000-0003-4405-2745
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.21273/hortsci13392-18
cg.isijournalISI Journal
cg.issn0018-5345
cg.issue1
cg.journalHortScience
cg.reviewStatusPeer Review
cg.subject.cipSWEETPOTATOES
cg.subject.cipSWEETPOTATO AGRI-FOOD SYSTEMS
cg.subject.cipCROP PROTECTION
cg.volume54
dc.contributor.authorAdikini, S.
dc.contributor.authorMukasa, S.B.
dc.contributor.authorMwanga, Robert O.M.
dc.contributor.authorGibson, R.W.
dc.date.accessioned2019-02-12T16:54:52Zen
dc.date.available2019-02-12T16:54:52Zen
dc.identifier.urihttps://hdl.handle.net/10568/99416
dc.titleVirus movement from infected sweetpotato vines to roots and reversion on root sproutsen
dcterms.abstractSweetpotato is usually propagated in Uganda by vine cuttings from mature crops, but sometimes sprouts from storage roots are used, especially in drought-prone areas. No information is available on whether the storage of roots of Ugandan cultivars are infected with the viruses and whether the sprouts on them express symptoms so that farmers can eliminate diseased ones. Information on root sprout reversion from virus infection is also lacking. The storage roots of five sweetpotato cultivars was sourced either by random selection of roots from already harvested roots or obtained from symptomless plants selected before harvest at Makerere University Agricultural Research Institute, Kabanyolo (MUARIK), and the National Semi Arid Resources Research Institute (NaSARRI). Roots were also generated in a screenhouse after being inoculated with Sweet potato feathery mottle virus (SPFMV) and/or Sweet potato chlorotic stunt virus (SPCSV). More than 70% of sprouts from roots of all the cultivars selected after harvest at MUARIK and NaSARRI were infected with the viruses. For roots obtained from symptomless plants, 64% and 21% of the sprouted roots from MUARIK and NaSARRI were infected with the viruses, respectively. Most of the root samples from MUARIK had visible virus symptoms on sprouts and tested positive for both SPFMV and SPCSV, whereas those from NaSARRI did not show symptoms and were infected primarily with SPFMV. Plants graft-inoculated with either SPCSV or SPFMV alone produced both infected and noninfected roots, whereas all the root sprouts from dually infected plants showed virus symptoms. Reversion from virus infection was observed on root sprouts infected singly with SPFMV, whereas those infected with SPCSV showed recovery only, and none of the root sprouts infected by both viruses showed recovery. This study proves that roots are good reservoirs for viruses, and reversion occurs only when singly infected with SPFMV. Therefore, there is a need to establish seed channels in which seedstock is cleaned continuously and made available to farmers.en
dcterms.accessRightsOpen Access
dcterms.audienceScientists
dcterms.audienceCGIAR
dcterms.audienceDevelopment Practitioners
dcterms.bibliographicCitationAdikini, S.; Mukasa, S.B.; Mwanga, R.O.M.; Gibson, R.W. 2019. Virus movement from infected sweetpotato vines to roots and reversion on root sprouts. HortScience. ISSN 0018-5345. 54:1. pp. 117-124.en
dcterms.extent117-124
dcterms.issued2019-01-01
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherAmerican Society for Horticultural Science
dcterms.subjectsweet potatoesen
dcterms.subjectvirusesen
dcterms.subjectsymptomsen
dcterms.subjectinfectionen
dcterms.typeJournal Article

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