Photoreceptor phytochrome regulates the cyclic guanosine 3',5'-monophosphate synthesis in Avena sativa L. сells

Abstract

The activity of guanylyl cyclase (GC) responsible for cGMP synthesis was found to be predominantly located in a fraction of plasma membranes in cells of Avena sativa seedlings. The GC activity was shown to depend on light conditions of plant cultivation and seedlings age. The reversible regulation of the GC activity in etiolated seedlings by red/far red light was found. This suggests that photoregulation of GC activity is mediated by phytochrome in cells of oat seedlings.