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872 El-Quesni, F. E. M., Gaweesh, S. S. M., Abd-Alla, M. S. (2002): Effect of weed control treatments and foliar fertilization on growth, yield, chemical composition and associated weeds of

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insecticide and phenolic elicitor treatment . Biores. Technol. 98 : 623 – 632 . Iyengar , E.R.R. , Reddy , M.P. 1996 . Photosynthesis in highly salt tolerant plants . In

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tartamkísérletben. (Long-term effects of herbicides on weeds. III. Effect of herbicide treatments on the weed mass in long-term experiments in Martonvásár.) Növényvédelem , 42 , 67–78. Bónis P

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226 Singh, J. and Dhankar, B. S. (1995): Effect of preharvest chemical treatment on storage loss of onion. - Advances in Horticulture and Forestry 4 : 119

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patients with hyperthyroidism during treatment. Med. Sci. Mon. 7 , 409–414. Kucharz E. J. Changes of plasma arginine vasopressin level in patients with hyperthyroidism during

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still a lack of sufficient antimicrobial treatment options [ 13 ]. Therefore, the pharmacological research focus has shifted to alternative antibiotic-independent approaches in order to avoid the ongoing trigger for acquisition of resistance in bacterial

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Galperin, M., Graf, S., Kenigsbuch, D., 2003: Seed treatment prevents vertical transmission of Fusarium moniliforme , making a significant contribution to disease control. Phytoparasitica, 31, 344

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231 241 El-Saka, M. M., Auda, M. S., Abou Dahab, T. (2002): Effect of nutrition with NPK and calcium chloride as preharvest treatments on flowers quality of Hippeastrum

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Acta Biologica Hungarica
Authors: Snežana Marković, Jovana Žižić, Ana Obradović, Branka Ognjanović, A. Štajn, Zorica Saičić, and M. Spasić

Stimulated erythropoiesis and reticulocytosis can be induced by daily bleeding, or by phenylhydrazine (PHZ) treatment. We compared the in vivo effects of PHZ and bleeding treatment on haematological, energy and redox status parameters in red blood cells (RBC) of rats. The results showed that all followed haematological parameters were significantly lower in bleeding, compared to PHZ-treated rats. PHZ induced even 2.58-fold higher reticulocytosis as compared to bleeding treatment. Although PHZ induced higher reticulocytosis, respiration intensity and energy production was lower than in bleeding-induced reticulocytes. These alterations were the consequence of increased superoxide anion and peroxynitrite concentrations in PHZ-treated rats. Bleeding treatment resulted in increased activity of an antioxidative enzyme, superoxide dismutase. In conclusion, differences in these two experimental models for reticulocytosis may be used as tools for appropriate pharmacological testing of redox-active substances considering energy and redox processes, as well as apoptosis pathways.

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Anthocyanins are natural antioxidants able to scavenge free radicals, which appear in plant cells under various environmental stresses. In wheat, anthocyanin pigments can be synthesized in vegetative and reproductive organs. The objective of the current study was to estimate the significance of these substances for wheat seedlings protection under irradiation stress (after treatment of dry seeds with moderate doses of gamma-irradiation, 50, 100 and 200 Gy). For this goal a set of near-isogenic lines (8 NILs) carrying different combinations of the Pp (purple pericarp) and Rc (red coleoptile) alleles were used. The effect of gammairradiation on the growth parameters and anthocyanin content in coleoptiles was studied at the 4th day after germination. The germination rate was not affected, while roots’ and shoots’ lengths and fresh weights as well as root number decreased significantly under irradiation treatment. The effect was deeper under higher doses. Irradiation treatment also induced change of root morphology (‘hairy roots’). The effect of treatment on coleoptile anthocyanin content depended on allelic combination at the Rc loci. At the presence of ‘weak’ Rc-A1 allele anthocyanin content decreased, while it did not change in lines with Rc-A1 + Rc-D1 combination (NILs with intensively colored coleoptiles). Factors ‘pericarp color’ and ‘coleoptile color’ influenced vigor of the seedlings under 50 Gy, whereas under higher doses (100 and 200 Gy) these factors did not contribute to growth parameters changes. Statistically significant positive effect of anthocyanins synthesized in coleoptile (in the presence of Rc-A1 + Rc-D1 dominant alleles) on root growth of seedling germinated from 50 Gy-treated seeds was observed.

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