Question

All of the following statements concerning the Actinomycetes filamentous soil bacterium Fmnkia are correct except that Frankia.

• A. Can induce root nodules of many plant species
• B. Can fix nitrogen in the free living state
• C. Cannot fix specialised vesicles in which the nitogenase is protected from oxygen by a chemical barrier involving triterpene hapanoids
• D. Like Rhizobium it usually infects its hort plant through root air deformation and stimulates cell proliferation in the hort cortex

Answer 1

Answer: (B)

Frankia, is a nitrogen fixing symbiotic bacteria which induces root nodules just like Rhizobium. It is symbiotically amaciated with root nodules of several non-legume plants like casucrina, Alkus, Rubus etc. It cant fix nitrogen in free-state.