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A ribosome-inactivating protein (curcin 2) induced from Jatropha curcas can reduce viral and fungal infection in transgenic tobacco

Huang, Ming-Xing, Hou, Pei, Wei, Qin, Xu, Ying, Chen, Fang
Plant growth regulation 2008 v.54 no.2 pp. 115-123
Tobacco mosaic virus, Jatropha curcas, proteins, plantlets, genome, Agrobacterium radiobacter, transgenic plants, Thanatephorus cucumeris, pathogens, Cauliflower mosaic virus, tobacco, leaves, fungi
A new kind of ribosome-inactivating protein (curcin 2), induced by several different kinds of stress from Jatropha curcas leaves, under the control of the CaMV (cauliflower mosaic virus) 35S promoter, was introduced into the tobacco genome by Agrobacterium tumefaciens-mediated transformation method. The curcin 2 protein was only detected in the transgenic tobacco plantlets transformed with the cur2p fragment (coding premature curcin 2 protein), but not in the plantlets with the cur2m fragment (coding mature curcin 2 protein). The T1 population of the transgenic lines shows an increased tolerance to tobacco mosaic virus (TMV) and a fungal pathogen Rhizoctonia solani by delaying the development of systemic symptoms of TMV and reducing the damage caused by the fungal disease. The increases of the tolerances correspond to the curcin 2 level in the transgenic plants.