A) cyanobacterial symbiosis with some. aquatic ferns
B) gall formation on certain angiosperms by Agrobacterium
C) nodulation of Sesbania stems by nitrogen fixing bacteria
D) plant growth stimulation by phosphate solublising bacteria
Correct Answer: B
Solution :
Agrobacterium tumefaciens is called natural plant genetic engineer. Its interaction with plants are most throughly studied amongst the four options given in the question.
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