Growth Response of Single-gene Dwarf Mutants in Maize to Gibberellic Acid.

required to reduce the methylene blue. It is clear that the long lag phase observed when methylene blue was present before all the oxygen was removed is due to an inhibition by methylene blue of the systems of the cell which consume oxygen. Summary. The rates of the exchange reaction and of the reduction of various dyes and other acceptors have been compared in a number of different microorganisms. While the activation of hydrogen, as measured by the exchange reaction, appears to be relatively simple, the utilization of the activated hydrogen for chemical reduction requires cofactors or additional enzyme systems.