Acta Agrophysica, 2008, 11(1), 131-140 COMPARISON OF PHYTOTOXICITY OF LEAD AND TIN ORGANIC COMPOUNDS BY MEANS OF LUMINESCENCE METHODS
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چکیده
Ab s t r a c t . The effect of organic-metallic compounds including lead, (C6H5)3PbCl, and tin, (C6H5)3SnCl, on cucumber leaves and green algae Scenedesmus quadricauda were studied. Both compounds, in concentration of 2 μmol dm, caused increased emission of ultra weak chemiluminescence (UCL) of cucumber leaf discs after 20 hours of treatment, and activity of tin triphenyl chloride was stronger than that of lead triphenyl chloride. Chilling at high light of the studied discs treated by both compounds increased UCL intensity more than the control ones. Suspension of green algae Scenedesmus quadricauda treated for 1 h, 2 h and 4 h by (C6H5)3SnCl in concentration 0.5 μmol dm -3 decreased the value of the LD parameter indicating inhibition of photosynthetic electron transport. However, after 20 h of treatment, adaptation of Scenedesmus quadricauda to the applied tin was observed. Otherwise, (C6H5)3PbCl caused a stronger decrease of LD depending on duration of treatment.
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