Biological Classification And System Of Classification Question 546
Question: The most thoroughly studied of the known bacteria-plant interactions is the
[CBSE PMT 2004]
Options:
A) Nodulation of Sebania stems by nitrogen fixing bacteria
B) Plant growth stimulation by phosphate-solubilising bacteria
C) Cyanobacterial symbiosis with some aquatic ferns
D) Gall formation on certain angiosperms by Agrobacterium
Show Answer
Answer:
Correct Answer: D
Solution:
Gall formation on certain angiosperms by Agrobacterium.
Plants and bacteria do interact with one another in a variety of different ways. The interaction are either beneficial, harmful or neutral for the plant, and sometimes the impact of a bacterium may vary as the soil conditions change.
The Agrobacterium crown gall phenomenon is to date the most thoroughly studied and best documented of the known bacteria/plant interactions.
This bacterium contains a large Ti plasmid which is extensively used as natural genetic engineer in plant genetic engineering.
BETA
