J. Hinrichs et al., EXTREME RESISTANCE TO POTATO-VIRUS-Y BASED ON THE RY-GENE IS NOT EXPRESSED IN POTATO PROTOPLASTS, Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz, 102(3), 1995, pp. 243-248
Isolated potato protoplasts were inoculated with potato Y potyvirus (P
VY) particles by polyethylene glycol (PEG). Infection of protoplasts w
as determined by enzyme-linked immunosorbent assay (ELISA) using anti-
PVY antibodies 1, 24 and 48 h post-inoculation (p.i.). 48 h p.i., viru
s replication was supported by extreme resistant potato cultivars as e
ffectively as by a susceptible cultivar. The extreme resistance to PVY
of cultivars bearing the Ry-gene from Solanum stoloniferum was, there
fore, not expressed by inoculated protoplasts.