Root nodules for nitrogen fixation of a nonleguminous tree possess

Options

(a) Frankia
(b) Rhizobium
(c) Azotobacter
(d) Thiobacillus

Correct Answer:

Frankia

Explanation:

Frankia is a Gram-positive species of actinomycete filamentous bacterium that lives in symbiosis with actinorhizal plants in the genus Alnus (nonleguminous tree).