Ganesan Uma, Suri Sarabjeet Singh, Rajasubramaniam Shanmugam, Rajam Manchikatla Venkat, Dasgupta Indranil
Plant Polyamine and Transgenic Research Laboratory, Department of Genetics, University of Delhi, South Campus, New Delhi 110021, India.
Virus Genes. 2009 Aug;39(1):113-9. doi: 10.1007/s11262-009-0359-9. Epub 2009 Apr 22.
Rice tungro, a devastating disease of rice in south and southeast Asia, is caused by the joint infection of Rice tungro bacilliform virus (RTBV) and Rice tungro spherical virus (RTSV). In order to obtain transgenic resistance against RTBV, indica rice cultivar Pusa Basmati-1 was transformed to express the coat protein (CP) gene of an Indian isolate of RTBV. Rice plants containing the transgene integrated in low copy numbers were obtained, in which the CP was shown to accumulate in the leaf tissue. The progenies representing three independent transformation events were challenged with Indian isolates of RTBV using viruliferous Green leafhoppers, and the viral titers in the inoculated plants were monitored using DNA dot-blot hybridization. As compared to non-transgenic controls, two independent transgenic lines showed significantly low levels of RTBV DNA, especially towards later stages of infection and a concomitant reduction of tungro symptoms.
水稻东格鲁病是南亚和东南亚地区水稻的一种毁灭性病害,由水稻东格鲁杆状病毒(RTBV)和水稻东格鲁球状病毒(RTSV)共同感染引起。为了获得对RTBV的转基因抗性,将籼稻品种Pusa Basmati-1进行转化,以表达印度分离株RTBV的外壳蛋白(CP)基因。获得了含有低拷贝数整合转基因的水稻植株,其中CP在叶片组织中积累。使用带毒的绿叶蝉用RTBV的印度分离株对代表三个独立转化事件的后代进行挑战,并使用DNA斑点杂交监测接种植物中的病毒滴度。与非转基因对照相比,两个独立的转基因株系显示RTBV DNA水平显著降低,尤其是在感染后期,同时东格鲁病症状减轻。