Induced resistance in systemic host-virus combinations by culture filtrates of Stachybotrys chartarum (Ehrenb. ex Link) Hughes
1987
Maiss, E. (Hannover Univ. (Germany, F.R.). Inst. fuer Pflanzenkrankheiten und Pflanzenschutz)
Culture filtrates of the fungus Stachybotrys chartatum sprayed on systemic hosts decreased the development of symptoms of different elongated and isometric viruses. The degree of induced resistance depended on the host-virus system. An interval of three or five days between application of the filtrate and virus inoculation was sufficient to induce resistance. High inoculum concentration reduced the efficiency of induced resistance in cucumber against CMV. The content of CMV in inoculated and systemically infected, induced resistant cucumber leaves was decreased. TMV inoculated leaves of induced resistant tobacco plants contained higher, systemically infected leaves0621lower virus amounts as comparable untreated control leaves. Reduced virus content and distribution in induced resistant plants obviously resulted from inhibition of multiplication and spread of viru
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