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Among the known bacteria-plant interactions, which interaction has been extensively studied?

Option: 1

Cyanobacterial symbiosis with some aquatic ferns.

Option: 2

Gall formation on certain angiosperms by Agrobacterium.

Option: 3

Nodulation of Sesbania stems by nitrogen-fixing bacteria.

Option: 4

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.

Posted by

Kuldeep Maurya

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