译 名：
Transmission of Brown Bast of Rubber Tree by Bark-grafting
作 者：
Chen Murong; Luo Daquan; Xu Laiyu; Ye Shabin; Huang Qiangchun ( Plant Protection Research Institute, CATAS; Ministry of Agriculture Key Labora- tory for Tropical Crops Physiology/Rubber Cultivation Research Institute, CATAS, Danzhou, Hainan 571737)
关键词：
brown bast of rubber tree diseased bark transmission by bark-grafting
摘 要：
Test on transmission of brown bast of rubber tree by bart-grafting revealed that typical brown bast symptom appeared on the trunks of the Originally healthy stocks three months after grafting. The disease incidence was 29-50 %. The symptom was water-soaked with brown lesions on the bark, dryness on the cut and reduced latex flow. Micro- precipitation and ELISA showed that trunks with brown bast accounted for 40-45 % in the origi nally stocks 13-14 months after grafing. When examined under electronic microscope, phy- toplasma were discovered in the cells of the phloem tissues from the trunks of the originally healthy stocks. The size of the phytoplasma was 300-850 um, with one layer of membrane of 9~12 um thick. No phytoplasma was discovered in the cell of the phloem tissues from the controlled trunks (healthy stocks, not grafted with diseased scions).
