Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A:

Step-by-step solution

Trichoderma species are free-living fungi found in the root ecosystem (rhizosphere). The fungus Trichoderma polysporum is responsible for the production of cyclosporin A. It is used as an immunosuppressive drug and is used by organ transplant patients to avoid graft rejection.