title: A virus in a fungus in a plant: three-way symbiosis required for thermal tolerance.
abstract: A mutualistic association between a fungal endophyte and a tropical panic grass allows both organisms to grow at high soil temperatures. We characterized a virus from this fungus that is involved in the mutualistic interaction. Fungal isolates cured of the virus are unable to confer heat tolerance, but heat tolerance is restored after the virus is reintroduced. The virus-infected fungus confers heat tolerance not only to its native monocot host but also to a eudicot host, which suggests that the underlying mechanism involves pathways conserved between these two groups of plants.
authors.affiliation: Plant Biology Division, Samuel Roberts Noble Foundation, Post Office Box 2180, Ardmore, OK 73402, USA.
authors.forename: Luis M
authors.initials: LM
authors.lastname: Márquez
authors.forename: Regina S
authors.initials: RS
authors.lastname: Redman
authors.forename: Russell J
authors.initials: RJ
authors.lastname: Rodriguez
authors.forename: Marilyn J
authors.initials: MJ
authors.lastname: Roossinck
mesh_terms: D001203:Ascomycota / Q000254:growth & development / Q000502:physiology* / Q000821:virology*; D001483:Base Sequence; D006358:Hot Temperature; D018551:Solanum lycopersicum / Q000382:microbiology / Q000502:physiology; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D018515:Plant Leaves / Q000378:metabolism; D006109:Poaceae / Q000254:growth & development / Q000382:microbiology* / Q000502:physiology*; D012328:RNA Viruses / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology*; D012330:RNA, Double-Stranded / Q000235:genetics / Q000378:metabolism; D012367:RNA, Viral / Q000235:genetics / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D013559:Symbiosis
chemical_list: D012330:RNA, Double-Stranded; D012367:RNA, Viral; D017382:Reactive Oxygen Species