Immunity of strains of Agaricus bitorquis to mushroom virus disease
Tóm tắt
Agaricus bitorquis, a species originally found in nature, produces snowwhite, tasty and well storable fruiting bodies on the common mushroom substrate. Several strains of this species were tested for susceptibility to mushroom virus, viz, the original wild isolatesA. bitorquis Nos 1, 2, 4 and 6, and the selection and breeding products ‘Somycel 2.017’, Horst B30, Horst B6, Horst K26 and Horst K32. Inoculum consisted of either mycelium or spores from virus-infected mushrooms (A. bisporus), or both. Trays withA. bisporus were always inoculated simultaneously to check the infectivity of the inoculum. UnlikeA. bisporus, the strains ofA. bitorquis tested did not show symptoms of virus disease after inoculation. Their fruiting bodies did not present mushroom virus particles, either in extracted cell-free preparations, or in ultrathin sections of the tissue. Yields ofA. bitorquis were not decreased by inoculation. The efficacy of the inoculation technique is discussed. The recent commercial availability of immune mushroom strains was a relief to Dutch mushroom growers, who found the disease difficult to eradicate by sanitary measures only.
Tài liệu tham khảo
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