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The effects of 100, 250, and 500 ppm acetylsalicylic acid solutions treatments on weight alteration, pigment and protein amounts in discs from the primary leaves of one month old bean (Phaseolus vulgaris L.) seedlings produced under greenhouse conditions are presented. The experiments show that: 100 ppm ASA had no significant influence (P?0.05) but 250 and 500 ppm ASA caused an increase on weight loss (P<0.01); ASA at higher concentrations (250 and 500 ppm), generally, caused a decrease on pigment amounts (P<0.05-P<0.01) but 100 ppm ASA had no considerably significant influence on them (P?0.05), none of the ASA treatments caused a statistically significant influence on carotenoid amount (P?0.05); 100 and 250 ppm ASA treatments did not cause a significant influence on protein amount (P?0.05), however 500 ppm ASA treatment caused an increase on protein injury (P<0.05). Consequently, it is supposed that wet weight loss, pigment and protein injury have somewhat increased on leaf discs, depending on the toxic effect of high acetylsalicylic acid concentrations.

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Acta Physiologica Hungarica
Authors: S. Taysi, N. Oztasan, H. Efe, M.F. Polat, K. Gumustekin, E. Siktar, E. Canakci, F. Akcay, S. Dane, and M. Gul

The aim of this study was to investigate whether an 8-week treadmill training attenuates exerciseinduced oxidative stress in rat liver. Male rats were divided into untrained and trained groups. Endurance training consisted of treadmill running at a speed of 2.1 km/h, 1.5 h/day, 5 days a week for 8 weeks. To see the effects of endurance training on acute exhaustive exercise induced oxidative stress, untrained and trained rats were further devided into two groups: animals killed at rest and those killed after acute exhaustive exercise, in which the rats run at 2.1 km/h (10% uphill) until exhaustion. Acute exhaustive exercise increased malondialdehyde level in untrained but not in trained rats. It decreased the activity of glutathione peroxidase and total (enzymatic plus non-enzymatic) superoxide scavenger activity in untrained rats and catalase activity in trained rats. However, it did not affect glutathione S-transferase, glutathione reductase, superoxide dismutase and non-enzymatic superoxide radical scavenger activities in both trained and untrained rats. On the other hand, endurance training decreased glutathione peroxidase and glutathione S-transferase activities. The results suggested that endurance training attenuated exercise-induced oxidative stress in liver, probably by preventing the decreases in glutathione peroxidase and total superoxide scavenger activities during exercise.

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