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Inhibitory Effects of Some Polysubstituted Phenoxyacetic Acid Derivatives on Photosynthetic Activity of Chloroplasts and on Chlorophyll Production in Wheat and Chlorella vulgaris

K. Kráľová, F. Šeršeň, M. Lacová, and Ľ. Mitterhauszerová

Institute of Chemistry, Faculty of Natural Sciences, Comenius University, CS-842 15 Bratislava


Abstract: The inhibition of oxygen evolution rate in spinach chloroplasts and chlorophyll production in algae Chlorella vulgaris as well as in wheat plants caused by some polysubstituted phenoxyacetic acid derivatives was investigated. 2,4,5-Trichlorophenoxyacetic acid and its derivatives exhibited substantially higher activity with respect to the inhibition of photosynthetic processes in spinach chloroplasts than the corresponding 2,4-dichloro and 2-methyl-4-chloro analogues. From the changes of EPR spectra of spinach chloroplasts in the presence of the studied compounds it can be supposed that these interact with both photosynthetic centres 1 and 2. The antialgal effect of the majority of studied compounds at the concentration 10-4 mol dm-3 is not pronounced.

Full paper in Portable Document Format: 474a264.pdf


Chemical Papers 47 (4) 264–267 (1993)

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