Which one of the following is commonly used in transfer of foreign DNA into crop plants?
Correct answer: B. Agrobacterium tumefaciens
- A. Meloidogyne incognita
- B. Agrobacterium tumefaciens
- C. Penicillium expansum
- D. Trichoderma harzianum
Explanation
Agrobacterium tumefaciens has been extensively used in genetic engineering experiments. It is the causative agent of crown gall, an important disease of many commercial crops. This disease has come to be recognized in recent years as being caused by a DNA plasmid (Ti plasmid) carried by bacterium and transferred to the plant cells. Following the discovery of the relationship between crown gall and the Ti plasmid, this plasmid has come to be widely used in plant genetic engineering as a vector in order to inject a novel gene in a host plant to form a transgenic plant.
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