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Question
Organism X infects all broad-leaved agricultural crops. For genetic engineering, its tumor forming genes are deleted. Here, X is
Organism X infects all broad-leaved agricultural crops. For genetic engineering, its tumor forming genes are deleted. Here, X is
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Solution
The correct option is A Agrobacterium tumefaciens
Agrobacterium tumefaciens causes crown gall disease of a wide range of dicotyledonous (broad-leaved) plants, especially members of the rose family. The disease gains its name from the large tumour-like swellings (galls) that typically occur at the crown of the plant, just above soil level. Although it reduces the marketability of nursery stock, it usually does not cause serious damage to older plants. Nevertheless, this disease is one of the most widely known, because of its remarkable biology. Basically, the bacterium transfers part of its DNA to the plant, and this DNA integrates into the plant’s genome, causing the production of tumours and associated changes in plant metabolism. A. tumefaciens infects the plant through its Ti plasmid. The Ti plasmid integrates a segment of its DNA, known as T-DNA, into the chromosomal DNA of its host plant cells. A. tumefaciens has flagella that allow it to swim through the soil towards photoassimilates that accumulate in the rhizosphere around roots. So the correct option is 'Agrobacterium tumefaciens'
Agrobacterium tumefaciens causes crown gall disease of a wide range of dicotyledonous (broad-leaved) plants, especially members of the rose family. The disease gains its name from the large tumour-like swellings (galls) that typically occur at the crown of the plant, just above soil level. Although it reduces the marketability of nursery stock, it usually does not cause serious damage to older plants. Nevertheless, this disease is one of the most widely known, because of its remarkable biology. Basically, the bacterium transfers part of its DNA to the plant, and this DNA integrates into the plant’s genome, causing the production of tumours and associated changes in plant metabolism. A. tumefaciens infects the plant through its Ti plasmid. The Ti plasmid integrates a segment of its DNA, known as T-DNA, into the chromosomal DNA of its host plant cells. A. tumefaciens has flagella that allow it to swim through the soil towards photoassimilates that accumulate in the rhizosphere around roots.
So the correct option is 'Agrobacterium tumefaciens'
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