| Popis: |
Different combinations of strains of pea early-browning and tobacco rattle Tobraviruses with selected Paratrichodorus and Trichodorus species were examined to identify if differences occurred in the location of virus particle retention within the nematodes. The study revealed that the sites of virus particle retention differed between the individual Tobravirus-trichodorid combinations. No differences were found in the sites of virus retention in nematodes that had been allowed to acquire, but not to transmit, virus compared with nematodes that had been allowed to acquire and subsequently transmit the virus. Virus particles of several strains of Tobraviruses were acquired and retained by trichodorids that are not natural vectors of the particular virus. In these instances the particles were retained within the pharyngeal tract at locations from where when released they are unable to be transferred anteriorly along the pharyngeal tract into plant cells, but rather they can move only posteriorly into the nematode intestine. |
