biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 38:397, 1996 | DOI: 10.1007/BF02896670

Effect of 3-formylchromones substituted with 4-aminosalicylic acid and some other aniline derivatives on photosynthesis inhibition in spinach chloroplasts

K. Kráľová1, F. Šeršeň1, M. Lácová2, H. Stankovičová2
1 Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina, Slovakia
2 Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina, Slovakia

The inhibitory effect was investigated of 16 different 3-formylchromone derivatives, the condensation products of 6-R1-3-formylchromone with 4-aminosalicylic acid and of the adducts of 6-R1-3-formylchromone withn-alcohols and aminosalicylic acids or some other derivatives of aniline, on the photochemical activity of spinach chloroplasts. The inhibitory activity of the compounds studied correlated with the lipophilicity of the R1 and R2 (alkoxy) substituents. Using fluorescence study it was found that the site of action of the studied effectors is photosystem (PS) 2. By EPR spectroscopy it was confirmed that the studied effectors interact with the intermediates Z+/Y+ which are situated in D 1 and D 2 proteins on the donor side of PS 2 which is reflected in a partial decrease in the photosynthetic electron flow through PS 2 to PS 1. It was found that the core of PS 2 is not damaged.

Keywords: EPR spectra; fluorescence emission; 3-formylchromone; Spinacia oleracea

Received: September 25, 1995; Accepted: December 6, 1995; Published: September 1, 1996  Show citation

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Kráľová, K., Šeršeň, F., Lácová, M., & Stankovičová, H. (1996). Effect of 3-formylchromones substituted with 4-aminosalicylic acid and some other aniline derivatives on photosynthesis inhibition in spinach chloroplasts. Biologia plantarum, 38(3), 397. doi: 10.1007/BF02896670
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