Powell C A, Pelosi R R, Rundell P A, Stover E, Cohen M
University of Florida, IFAS, Indian River Research and Education Center, 2199 S. Rock Road, Ft. Pierce 34945-3138.
Plant Dis. 1999 Nov;83(11):989-991. doi: 10.1094/PDIS.1999.83.11.989.
The ability of three mild isolates of citrus tristeza virus (CTV) to prevent natural infection of 84 Ruby Red grapefruit on sour orange rootstock by aphid-transmitted, decline-inducing isolates of CTV was assessed by symptoms and verified by enzyme-linked immunosorbent assay (ELISA) after 16 years. Of 21 trees in each of four treatments protected by the DD 102 bb, Guettler HS, and DPI 1-12-5-X-E mild CTV isolates, 14, 10, and 14% were infected by severe isolates (MCA13 monoclonal antibody reactive) compared with 67% for unprotected control trees. The health of trees protected by the DD 102 bb CTV isolate was significantly better than that of unprotected control trees as measured by decline, tree ratings, and tree height. These data suggest that infection by certain mild isolates of CTV can cross-protect grapefruit trees on sour orange rootstock from decline-inducing isolates of CTV that are prevalent in the Indian River region of Florida.
通过症状评估了三种温和型柑橘衰退病毒（CTV）分离株对84株酸橙砧木上的红宝石红葡萄柚自然感染由蚜虫传播的致衰退型CTV分离株的预防能力，并在16年后通过酶联免疫吸附测定（ELISA）进行了验证。在由DD 102 bb、Guettler HS和DPI 1-12-5-X-E温和型CTV分离株保护的四种处理中，每种处理的21棵树中，分别有14%、10%和14%被严重分离株（MCA13单克隆抗体反应性）感染，而未受保护的对照树感染率为67%。通过衰退、树体评级和树高测量，由DD 102 bb CTV分离株保护的树的健康状况明显优于未受保护的对照树。这些数据表明，某些温和型CTV分离株的感染可以交叉保护酸橙砧木上的葡萄柚树免受佛罗里达州印度河地区普遍存在的致衰退型CTV分离株的侵害。
