Factors influencing reversion from virus infection in sweetpotato

The Annals of Applied Biology
Alexander SsamulaPeter Wasswa

Abstract

Viruses limit sweetpotato (Ipomoea batatas) production worldwide. Many sweetpotato landraces in East Africa are, however, largely virus-free. Moreover, some plants infected by the prevalent Sweet potato feathery mottle virus (SPFMV) may be able to revert to virus-free status. In this study, we analysed reversion from SPFMV, Sweet potato virus C, Sweet potato mild mottle virus, Sweet potato chlorotic stunt virus (SPCSV) and Sweet potato leaf curl Uganda virus using the indicator plant I. setosa and PCR/reverse-transcriptase PCR. We also investigated environmental factors (temperature and soil nutrients) that may influence reversion from virus infection. We tested reversion in the East African cultivars New Kawogo, NASPOT 1 and NASPOT 11, and the United States cultivars Resisto and Beauregard. Reverted plants were asymptomatic and virus was undetectable in assayed parts of the plant. After graft inoculation, only the East African cultivars mostly reverted at a high rate and from most viruses though cultivar Beauregard fully reverted following sap inoculation with Sweet potato virus C. None of the tested cultivars fully reverted from single or double infections involving SPCSV, and reversion was only observed in co-infections invo...Continue Reading

References

May 14, 2005·Journal of Virology·Jan F KreuzeJari P T Valkonen
Jul 26, 2005·Plant Physiology·Padmanabhan ChellappanClaude M Fauquet
Nov 20, 2018·Frontiers in Plant Science·Dinesh Babu Paudel, Hélène Sanfaçon
Feb 1, 2012·Plant Disease·Christopher A ClarkJari P T Valkonen
Dec 1, 2004·Plant Disease·Ruhui LiSuzanne Hurtt
Sep 1, 2004·Plant Disease·Fred TairoJari P T Valkonen
Apr 1, 2003·Plant Disease·Settumba B MukasaJari P T Valkonen
Jan 1, 2017·Food Security·Paul RachkaraRichard William Gibson

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Datasets Mentioned

BETA
AJ459319

Methods Mentioned

BETA
PCR
electrophoresis
ELISA

Software Mentioned

MUARIK

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