Hidrológiai Közlöny 2009 (89. évfolyam)

6. szám - L. Hidrológiai Napok: "A hazai hidrobiológia ötven éve" Tihany, 2008. október 1-3.

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(1994) Isolation and identification of 12 microcystins from 4 strains and 2 bloom samples of Microcystis spp.- structure of a new hepatotoxin. Toxicon 32: 133-139. MacKintosh, C.; Beattie, K.A.; Klumpp, S.; Cohen, P. and Codd, G.A. (1990) Cyanobacterial microcystin-LR is a potent and specific inhibitor of protein 93 phosphatases 1 and 2A from both mammals and higher plants. Fed. Eur. Biochem. Soc. Lett. 264: 187-192. Máthé Cs., Bakos F., M-Hamvas M., Surányi Gy., Vasas G., Molnár E., Grigorszky I. és Borbély Gy. (2001) A NADP-fiiggő izocitrát-dehidrogenáz (NADP-IDH) enzim aktivitásának változása mikrocisztinnel kezelt nád (Phragmites australis (Cav.) Trin. ex Steud.) sejtszuszpenziós tenyészetekben. Hidrológiai Közlöny 81 (5-6): 405-406. Máthé, Cs., M-Hamvas M., Vasas G., Surányi Gy., Bácsi I., Beyer D., Tóth Sz., Tímár M. and Borbély G. (2007) Microcystin-LR, a cyanobacterial toxin, induces growth inhibition and histological alterations in common reed (Phragmites australis /Cav./Trin. Ex Steud.) plants regenerated from embryogenic calli. New Phytol. 176. (4) 824-835. M-Hamvas M., Vasas G., Surányi Gy., Máthé Cs., Molnár E., Grigorszky I. és Borbély Gy. (2001) A toxikus Microcystis aeruginosa és Cylindrospermopsis raciborskii kivonatok hatása a mustár csíranövények fehétjemintázatára. Hidrológiai Közlöny 81 (5-6): 410-412. M-Hamvas, M.; Máthé, Cs.; Molnár, E.; Vasas G.; Grigorszky I. and Borbély Gy. (2003) Microcystin-LR alters the growth, anthocyanin content and single-stranded DNase enzyme activities in Sinapis alba L. seedlings. Aquatic Toxicology 62(1): 1-9. McElhiney, J.; Lawton, L.A. and Leifert, C. (2001) Investigations intő the inhibitory effects of microcystins on plánt growth, and the toxicity of plánt tissues following exposure. Toxicon 39: 1411-1420. Oudra, B.; El Andaloussi, M.; Franca. S.; Barros, P.; Martins, R.; Oufdou, K.; Sbiyya, B.; Loudiki, M.; Mezrioui, N. and Vasconcelos, V. (2000) Harmfijl cyanobacterial toxic blooms in waste stabilization ponds. Wat. Sci. Technol. 42: 179-186. Rao, P.V.L. and Bhattacharaya, R. (1996) The cyanobacteria toxin microcystinLR induced DNA damage in mouse liver in vivo. Toxicology (114) 29-36. Sivonen, K.; Niemela, S.I.; Niemi, R.M.; Lepisto, L.; Luoma, T.H. and Rasanen, L.A. (1990) Toxic Cyanobacteria (Blue-green Algae) in Finnish Fresh and Coastal Waters. Hydrobiologia 190: 267-275. Sivonen, K; Skulberg, O.M.; Namikoshi, M.; Evans, W.R.; Carmichael, W.W. and Rinehart, K.L. (1992). Two methyl ester derivates of microcystins, cyctic heptapeptide hepatotoxins, isolated from Anabaena flos-aquae strain CYA 83/1. Toxicon 30: 1465-1471. Vasas G., M-Hamvas M., Máthé Cs., Molnár E., Grigorszky I. és Borbély Gy. (2000) Cianotoxinok kimutatása mustár csiranövény-teszttel (BGST) Cylindrospermopsis raciborskii cianobaktériumból. Hidr.Közl. 80 (5-6): 380-382 Weiss, J.; Liebert H-P. and Brauné, W. (2000). Influence of microcystin-RR on growth and photosynthetic capacity of the duckweed Lemna minor L. J. Appl. Bot. 74: 100-105. Yoshizawa, S.; Matsushima, R.; Watanabe, M.F.; Harada, K-I.; Ichihara, A.; Carmichael, W.W. and Fujiki, H., 1990. Inhibition of protein phosphatases by microcystins and nodularin associated with hepatotoxicity. J. Cancer Res. Clin. Oncol. 116: 609-614. Zegura, B.; Sedmak, B. and Filipié, M. (2003) Microcystin-LR induces oxidative DNA damage in humán hepatoma cell line HepG2. Toxicon 41, 41-48. Appearance of toxin producing Microcystis species in a garden lake in Szeged I. Bácsi, Gy. Surányi, S. Gonda, Gy. Gyémánt, A. Szőnyi and G. Vasas Abstract: The appearance of cianobacterial mass production in natural and artificial water bodies is a well known phenomenon. We can find a lot of articles in the scientific literature about the environmental and economical consequences of these blue-green algal blooms. In the summer of the year 2006 bluish-green mass appeared on the water surface and the color of the water turnéd green in a garden lake in Szeged. To get rid of the algae, the owner watered the algal mass on the grass in the garden. The grass, irrigated regularly with the lake water started to sallow and after 2-3 weeks it perished. The other part of the garden was irrigated with tap water; the destruction of the grass did not occurred on that area. We identified four Microcystis species in the water sample from the garden lake. Ali of these species are potentially toxin producers. The toxicity of the cell mass was confírmed by laboratory tests. The microcystin variants standing in the background of the toxicity were identified by analytical methods. On the base of the results we can say, that great number of microcystin variants and high totál microcystin concentration stand behind the strong toxicity of the water-bloom. Keywords: Garden lake, Microcystis species, irrigation , grass destruction, microcystins.