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 planes, are most thoroughly studied amongest the four options given in the question.
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