Phytochrome Regulation of Nitrite Reductase--a Chloroplast Enzyme--in Etiolated Maize Leaves

Nitrite reductase in the excised etiolated leaves of maize showedthe photoreversibility by red and far-red light. Five minutesof red light illumination lead to a 130% increase in the enzymeactivity which was reversed by far-red light. The kinetics ofnitrite reductase activity under continuous far-red light showeda lag phase of 1 hr. (Received January 17, 1981; Accepted February 20, 1981)