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001-es BibID:	BIBFORM108213
Első szerző:	Mikóné Hamvas Márta (biológus)
Cím:	A mikrocisztin-LR (cianotoxin) hatásai különböző vízinövényfajokra = The effects of microcystn-LR on aquatic plant species / M-Hamvas Márta, Jámbrik Katalin, Máthé Csaba, Vasas Gábor, Bácsi István, Beyer Dániel, Borbély György
Dátum:	2008
Megjegyzések:	Cyanobacterial toxins have adverse effects on mammals, birds and fishes and are therefore being increasingly recognised as a potent stress and health hazard factor in aquatic ecosystems. Microcystins (MCY), which are cyclic heptapeptides and a main group of the cyanotoxins, are retained within the producer-cells during cyanobacterial bloom development. But, these toxins are released into surrounding medium by senescence and lysis of the bloom. The released MCY could then come into contact with a wide range of aquatic organisms including aquatic plants. Aim of this study was compare the effects of MCY-LR in cell free extracts of Microcystis aeruginosa (BGSD-243) culture on three aquatic plant species. Ceratophyllum demersum is able to reduce the harmful effects of MCY-LR during biotransformation produced ROS (PLUGMACHER S. 2004). It is the reason of increase of several antioxidant enzymes. In our study during exposure of Ceratophyllum to MCY-LR in a concentration of 0,02-4 ?g ml-1 an elevation of protease enzymes activity was detected. Lemna minor was less sensitive to MCY-LR, than the other two species, neither the growth parameters nor the enzyme (ssDNase and protease) activity gels had shown significant changes. Wolffia arrhiza plants were the most sensitive to MCY-LR. Growth (as weight and frond number) and chlorophyll content were significantly reduced after 5 days of exposure to concentration of 2-4 ?g ml-1 and 1-4 ?g ml-1 , respectively. The isoenzyme patterns of ssDNase and protease enzymes, as revealed by activity gels, showed characteristic changes, several isoenzymes were far more active in the MCY-LR treated plants.
ISBN:	978-963-06-4626-0
Tárgyszavak:	Természettudományok Környezettudományok előadáskivonat könyvrészlet
Megjelenés:	IV. Kárpát-medencei Környezettudományi Konferencia / szerk. Orosz Zoltán, Szabó Valéria, Molnár Géza, Fazekas István. - 2. köt., p. 247-253. -
További szerzők:	Jámbrik Katalin Máthé Csaba (1966-) (biológus) Vasas Gábor (1975-) (biológus-vegyész) Bácsi István (1977-) (biológus) Beyer Dániel (1982-) (molekuláris biológus) Borbély György (1943-) (biológus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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