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Question

The bacteria commonly used in plant genetic engineering is


A
Bacillus megaterium
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B
Agrobacterium tumefaciens
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C
Salmonella typhi
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D
None of the above
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Solution

The correct option is D Agrobacterium tumefaciens
Agrobacterium tumefaciens and related Agrobacterium species have been known as plant pathogens since the beginning of the 20th century. However, only in the past two decades has the ability of Agrobacterium to transfer DNA to plant cells been harnessed for the purposes of plant genetic engineering. Since, the initial reports in the early 1980s using Agrobacterium to generate transgenic plants, scientists have attempted to improve this “natural genetic engineer” for biotechnology purposes. Some of these modifications have resulted in extending the host range of the bacterium to economically important crop species. However, in most instances, major improvements involved alterations in plant tissue culture transformation and regeneration conditions rather than manipulation of bacterial or host genes. 
Thus, the correct answer is option B.

Biology

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