The inoculum source for graft and
aphid inoculations were Pineapple sweet orange
plants infected with CTV strains T-305 or T-300,
maintained in containers in an insect-proof screenhouse
at the IVIA. Bark chips of 0.75 to 1 cm2 in size
from the CTV-infected source plants were grafted
onto the citrange rootstock of each transgenic or control
plant, 1 to 2 cm below the bud union. Between 1
and 2 months after inoculation, CTV RNA was detected
in all scions and then the inoculum chips were
removed. RNA detection was done by print-capture
reverse transcription followed by nested PCR in a
single closed tube (PC-RT-NESTED-PCR) (Olmos et
al. 1999).