Collect. Czech. Chem. Commun.
1997, 62, 516-520
https://doi.org/10.1135/cccc19970516
Effect of 2-Alkylthio-4-pyridinecarbothiamides on Photosynthetic Electron Transport in Spinach Chloroplasts
Katarína Kráľováa, František Šeršeňa, Věra Klimešováb and Karel Waisserb
a Institute of Chemistry, Comenius University, 842 15 Bratislava, Slovak Republic
b Department of Inorganic and Organic Chemistry, Charles University, 501 65 Hradec Králové, Czech Republic
Abstract
2-Alkylthio-4-pyridinecarbothiamides (1) inhibit photosynthetic electron transport in spinach chloroplasts. The dependence of photosynthesis-inhibiting activity upon the lipophilicity of 2-alkylthio substituent shows quasi-parabolic course with maximum effectiveness at 2-octyl derivative. The site of action of 1 is the intermediate D+, corresponding to tyrosine radical, which is situated in D2 protein on the donor side of photosystem 2.
Keywords: 2-Alkylthio-4-pyridinecarbothiamides; Photosynthesis inhibition; Photosynthetic centres.
