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    Acibenzolar-S-methyl induces resistance against cassava mosaic geminiviruses in Nicotiana benthamiana and their vector Bemisia tabaci in cassava (Manihot esculenta)

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    Journal Article (2.299Mb)
    Date
    2021-12
    Author
    Doungous, O.
    Khatabi, B.
    Hanna, R.
    Tchuanyo, M.
    Fotso Kuate, A.
    Fondong, V.N.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Cassava mosaic disease (CMD), caused by cassava mosaic geminiviruses (CMGs), is a major constraint to the cassava crop in Africa and southeastern Asia. Here, we investigated the ability of acibenzolar-S-methyl (ASM), a functional analog of salicylic acid (SA), to trigger systemic acquired resistance (SAR) against two CMGs, namely African cassava mosaic virus (ACMV) and East African cassava mosaic Cameroon virus (EACMCV) in Nicotiana benthamiana. ASM treatment delayed the time to first viral symptoms appearance, reduced virus infection rate, and attenuated symptoms. Furthermore, ASM caused an enhanced recovery from symptoms of both viruses and inhibited plant death observed in N. benthamiana plants infected by EACMCV. This study further showed that ASM induced resistance to the whitefly Bemisia tabaci (Gennadius), the vector of CMGs, in cassava. Notably, we observed that ASM treatment affected adult whitefly feeding preference and oviposition in cassava under both choice and no-choice conditions. A significant reduction in whitefly adult, egg, and nymph populations was observed irrespective of ASM treatment. The results of this study show that ASM has the potential to control both CMGs and their whitefly vector which is an important first step toward managing whitefly and cassava viruses.
    https://dx.doi.org/10.1016/j.cropro.2021.105796
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7255
    IITA Authors ORCID
    Rachid Hannahttps://orcid.org/0000-0002-5715-0144
    Fotso Kuate, A.https://orcid.org/0000-0002-5247-7519
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1016/j.cropro.2021.105796
    Research Themes
    Plant Production and Health
    IITA Subjects
    Agronomy; Cassava; Plant Breeding; Plant Diseases; Plant Health; Plant Production
    Agrovoc Terms
    Cassava; African Cassava Mosaic Virus; Bemisia Tabaci; Nicotiana; Cameroon
    Regions
    Africa; Central Africa
    Countries
    Cameroon
    Hubs
    Central Africa Hub
    Journals
    Crop Protection
    Collections
    • Journal and Journal Articles4835
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