The Photoresponse of <italic>S</italic>-Adenosylmethionine Decarboxylase Activity in Leaves of <italic>Pharbitis nil</italic>

Abstract

S-Adenosylmethionine decarboxylase activity in leaves of Pharbitis nil increased dramatically at lights-on and then gradually decreased in the light. The enzymatic activity fell dramatically at lights-off then increased slightly in darkness. Photoinduction was prevented by cycloheximide and the enzymatic activity fell dramatically upon treatment with cycloheximide in the light.