engleski

Susceptibility of host plants to belladonna mottle and turnip yellow mosaic tymoviruses : multiplication and distribution

The susceptibility of host plant to the multiplication of Belladonna Tymovirus (BeMV, isolate BeMV-M from Croatia)and Turnip Yellow Mosaic Tymovirus (TYMV, isolate TYMV-Y65 from Slovenia) was assessed from virus concentration (mg/ml) in systemicaly invaded leaves of plants infected under glasshouse conditions. The order of the decreasing susceptibility with BeMV was: Datura stramonium (3.9), Nicotiana megalosiphon (3.8), N. clevelandii (3.3), Petunia hybrida (3), N. glutinosa (2.2), Physalis alkekengi (1.4), Capsicum annuum (1.3) with TYMV it was: Brassica chinensis 'Michihli' (3.4), B. rapa var. rapa (turnip) 'Kranjska' (2.8), Sinapis arvensis (1.4) and S. alba (1.2). In D. stramonium and turnip plants concentration of BeMV and TYMV, respectively fell from leaf lamina via stem and leaf petiole to root. In the leaves of glasshouse infected and field infected turnip plants the TYMV concentrations were comparable. Relatively high virus concentration in the fleshy root of the latter plants was higher in the central then in the peripheral part. The concentration was determined in low speed centrifuged plant sap by the single radial immunodiffusion method.

plants; tymoviruses

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