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Virologica Sinica, 16 (1) : 55-58, 2001
Research Article
Block of Viral M ovement in Papaya M utant Plants Resistant to Papaya Ringspot Virus
Plant virology laboratory,South China Agricultural University,Guangzhou 510642,China
One—step RT—PCR was used to detect papaya ringspot virus(PRSV)movement in susceptible
and resistant(mutant)papaya(Carla papaya L )plants.The time of post—inoculation at which
PRSV Wc-lS first detected in susceptible plants was 48 hours in the other area of inoculated leaves OUt Of
inoculated sites.4 days in the petioles of inoculated leaf and 6 days in all parts of plant.Compa rative—
ly,in resistant plants,the inoculated sites were the only area at which PRSV can be detected any
time.Therefore.it was proposed that the mutated resistance to PRSV protects the virus from moving
out of inoculated sites or/and into non- noculated areas.
  Published online: 5 Feb 2001
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