Interaction between Fusarium oxysporum f. sp. cubense and Radopholus similis can lead to changes in the resistance of ba
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Interaction between Fusarium oxysporum f. sp. cubense and Radopholus similis can lead to changes in the resistance of banana cultivars to Fusarium wilt Anelita Jesus de Rocha & Mileide Santos dos Ferreira & Leandro Souza de Rocha & Saulo A. S. Oliveira & Edson Perito Amorim & Eduardo S. G. Mizubuti & Fernando Haddad
Accepted: 21 July 2020 # Koninklijke Nederlandse Planteziektenkundige Vereniging 2020
Abstract Fusarium oxysporum f. sp. cubense (Foc) causes Panama disease or Fusarium wilt of bananas. The association between soil-inhabiting fungi and nematodes can increase the severity of symptoms and suppress the resistance of plants to diseases. In this study, the interaction between Foc race 1 and Radopholus similis, a burrowing nematode that parasitizes banana plants, was analyzed using one moderately susceptible cultivar and seven resistant cultivars of banana. Two Foc isolates that differed in virulence were tested. The analyses of symptoms and stained fungal structures in the roots demonstrated that R. similis interacting with Foc in different inoculation sequences caused changes in symptom severity and the resistance pattern to Foc isolate 0801 (race 1) in cultivars ‘Terra Maranhão’, ‘BRS Pacovan Ken’, ‘BRS Vitória’, and ‘BRS Platina’. The data generated in this study have relevant
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10658-020-02081-y) contains supplementary material, which is available to authorized users. A. J. de Rocha : M. S. dos Ferreira Universidade Federal do Recôncavo da Bahia, Rua Rui Barbosa, 710 – Centro, CEP, Cruz das Almas, Bahia 44380-000, Brazil L. S. de Rocha : S. A. S. Oliveira : E. P. Amorim : F. Haddad (*) Embrapa Mandioca e Fruticultura, Rua Embrapa, s/n, CP 007, Centro, CEP, Cruz das Almas, Bahia 44380-000, Brazil e-mail: [email protected] E. S. G. Mizubuti Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n – Campus Universitário, Viçosa, Minas Gerais, Brazil
implications for banana breeding programs in the classification of cultivars for durable resistance to Fusarium wilt and for understanding pathogen interactions during occurrence of the disease. Keywords Banana . Fungi . Phytonematodes . Musa . Synergism
Introduction Fusarium oxysporum f. sp. cubense (EF Smith) Snyder and Hansen (Foc) causes Panama disease or Fusarium wilt (FW) in bananas, a fungal disease that is a serious threat to both export crops and small-scale banana production worldwide (Ploetz, 2015). Another pathogen of fruit crops, including bananas, is the burrowing nematode Radopholus similis (Cobb) Thorne. Overall, R. similis is considered the fourth most destructive nematode that attacks different crops and the most damaging to banana cultivation (Hartman et al. 2010; Jones et al. 2013; Sankar et al. 2017). Foc is a soil necrotrophic pathogen that produces chlamydospores, survival spores that remain viable allowing the disease to persist and preventing the use of susceptible banana cultivars. Consequently, the use of resistant cultivars is
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