Content and distribution of beet necrotic yellow vein virus (BNYVV) in sugar beet varieties with different degrees of susceptibility to rhizomania
1990
Buettner, G. | Buercky, K.
The concentration of beet necrotic yellow vein virus (BNYVV) in the lateral rootlets, tap roots and hypocotyls of young plants of sugar beet varieties known to differ in susceptibility to rhizomania was examined. Independent of the degree of susceptibility of the variety, the concentration of BNYVV was always higher in lateral rootlets than in the tap root or in the hypocotyl, but ELISA-readings of extracts from lateral rootlets as well as from tap roots were higher in plants of the susceptible varieties. Higher temperatures and permanent illumination led to an increase in virus content in these tissues. Generally, the virus content of tap roots and/or hypocotyls was a better indicator of varietal differences in susceptibility than that of lateral rootlets. Possible reasons for the differences in virus content and distribution as well as the use of such differences in the selection of genotypes more resistant to rhizomania are discussed
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