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A moderate level of hypovirulence conferred by a hypovirus in the avocado white root rot fungus, Rosellinia necatrix.
Arjona-López, Juan M; Telengech, Paul; Suzuki, Nobuhiro; López-Herrera, Carlos J.
Afiliación
  • Arjona-López JM; Institute for Sustainable Agriculture, Spanish Research Council, Alameda Del Obispo s/n, 14004, Cordoba, Spain.
  • Telengech P; Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan.
  • Suzuki N; Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan.
  • López-Herrera CJ; Institute for Sustainable Agriculture, Spanish Research Council, Alameda Del Obispo s/n, 14004, Cordoba, Spain. Electronic address: lherrera@ias.csic.es.
Fungal Biol ; 125(1): 69-76, 2021 01.
Article en En | MEDLINE | ID: mdl-33317778
Two isolates of Rosellinia necatrix (Rn118-8 and Rn480) have previously obtained from diseased avocado trees in commercial orchards of the coastal area in southern Spain. Rn118-8 and Rn480 have weak virulence on avocado plants, and are infected by R. necatrix hypovirus 2 (RnHV2). In this work, the possible biological effects of the hypovirus on R. necatrix were tested. First, RnHV2 was transmitted from each of Rn118-8 and Rn480 to a highly virulent, RnHV2-free isolate of R. necatrix (Rn400) through hyphal anastomosis, using zinc compounds which attenuate the mycelial incompatibility reactions and allow for horizontal virus transfer between vegetatively incompatible fungal strains. Next, we carried out an analysis of growth rate in vitro and a virulence test of these newly infected strains in avocado plants. We obtained five strains of Rn400 infected by RnHV2 after horizontal transmission, and showed some of them to have lower colony growth in vitro and lower virulence on avocado plants compared with virus-free Rn400. These results suggest that R. necatrix isolates infected by RnHV2 could be used as novel virocontrol agents to combat avocado white root rot.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ascomicetos / Virus Fúngicos País/Región como asunto: Europa Idioma: En Revista: Fungal Biol Asunto de la revista: MICROBIOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ascomicetos / Virus Fúngicos País/Región como asunto: Europa Idioma: En Revista: Fungal Biol Asunto de la revista: MICROBIOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: España Pais de publicación: Países Bajos