Inhibitory effect of piperidinoethylesters of alkoxyphenylcarbamic acids on photosynthesis.
Piperidinoethylesters of 2-, 3- and 4-alkoxysubstituted phenylcarbamic acids (alkoxy = methoxy - decyloxy) inhibit photosynthetic processes in algae and plant chloroplasts. The inhibitory activity is strongly dependent on the alkyl chain length of the alkoxy-substituent showing a typical quasi-parabolic dependence with maximum effect at 6-8 carbon atoms in the alkyl chain. The alkoxy-substitution in position 2 decreases the inhibitory activity of a compound when compared with its 3- and 4-substituted analogues. ESR studies of spinach chloroplasts confirm that the compounds studied cause destruction of PS II whereby, in the presence of the most effective of the derivatives tested, Mn2+ ions are released from the protein complex.
Král'ová
K
K
Faculty of Sciences, J. A. Comenius University, Bratislava, Czechoslovakia.
Sersen
E
E
Cizmárik
J
J
D002219:Carbamates / Q000494:pharmacology*; D002708:Chlorella / Q000187:drug effects / Q000378:metabolism*; D004578:Electron Spin Resonance Spectroscopy; D004952:Esters; D008345:Manganese / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects*; D010880:Piperidines / Q000494:pharmacology*; D010944:Plants / Q000187:drug effects / Q000378:metabolism*; D013329:Structure-Activity Relationship
D002219:Carbamates; D004952:Esters; D010880:Piperidines; D008345:Manganese