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Among the known bacteria-plant interactions, which interaction has been extensively studied?
Cyanobacterial symbiosis with some aquatic ferns.
Gall formation on certain angiosperms by Agrobacterium.
Nodulation of Sesbania stems by nitrogen-fixing bacteria.
Plant growth stimulation by phosphate-solubilizing bacteria.
Answers (1)
Gall formation caused by Agrobacterium is a well-studied interaction due to its significance in plant pathology and genetic engineering. Agrobacterium tumefaciens, a soil bacterium, has the ability to transfer a part of its DNA, known as the T-DNA, into the plant cells, leading to the formation of characteristic tumor-like galls.
On the other hand, the nodulation of Sesbania stems by nitrogen-fixing bacteria is also an important interaction, but the extensive research on Agrobacterium-induced gall formation makes it the most thoroughly studied among the given options.
Therefore, the correct answer is option (2) gall formation on certain angiosperms by Agrobacterium.
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