000			01464nam a2200193Ia 4500
008			220216s9999 xx 000 0 und d
100			_aMurong Chen
245		0	_aTransmission of brown bast of rubber trees by bark-grafting
260			_bProceedings of IRRDB Symposium 1999, Hainan, Peoples Republic of China. pp.245-253.
520			_aTransmitting test on brown bast of rubber trees by bark-grafting gave following results: 1) Three months after grafting, typical brown bast symptoms displayed on the trunks of the originally health stocks. The incidence of disease was 29-50;. The symptoms were water-soaked, brown lesion on the bark, dryness on the cut and less latex. 2) Assaying by means of micro-precipitation and ELISA showed that trunks with brown bast accounted for 40-45;of the originally healthy stocks 13-14 months after grafting. 3) Examined under electronic microscope, Phytoplasma were discovered in the cells of the phloem tissues from the trunks of the originally healthy stocks. The size of the Phytoplasma was 300-850mm, with one layer of membrane in 9-12 mm thickness. No these Phytoplasma were discovered in the cell of the phloem tissues from the controlled trunks (healthy stocks, not grafting with diseased scions).
650			_aBrown bast
650			_aDiseased bark
650			_aTransmission by bark-grafting
700			_aDaquan Luo
700			_aLaiyu Xu
700			_aQiangchun Huang
700			_aShabin Ye
942			_cJS
999			_c71498 _d71498