Correct option is C
Correct option: (c) Woronin – Described association of bacteria with root nodules
· Woronin first reported bacteria associated with
root nodules (nitrogen fixation context).
Other options:
· (a) J.C. Arthur – Known for rust fungi taxonomy, not crown gall.
· (b) Alfred Fischer – Opposed the role of bacteria in plant diseases.
· (d) E.F. Smith – Worked on crown gall,
not anthrax.