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001-es BibID:	BIBFORM018704
Első szerző:	Mikóné Hamvas Márta (biológus)
Cím:	Cylindrospermopsin and microcystin-LR alter the growth, development and peroxidase enzyme activity of white mustard (Sinapis alba L.) seedlings, a comparative analysis / Márta M-Hamvas, C. Máthé, G. Vasas, Katalin Jámbrik, Mária Papp , D. Beyer, Ilona Mészáros, G. Borbély
Dátum:	2010
ISSN:	0236-5383
Megjegyzések:	This work focuses on the comparative analysis of the effects of two cyanobacterial toxins of different chemical structure cylindrospermopsin (CYN) and microcystin-LR (MC-LR) on the white mustard (Sinapis alba L.) seedlings. Both cyanotoxins reduced significantly the fresh mass and the length of cotyledons, hypocotyls and main roots of seedlings in a concentration dependent manner. For various mustard organs the 50% inhibitory concentration values (IC50) of growth were between 3?5 ?g ml?1 for MC-LR and between 5?10 ?g ml?1 for CYN, respectively. Cyanotoxins altered the development of cotyledons, the accumulation of photosynthetically active pigments and anthocyanins. Low MC-LR concentrations (0.01 and 0.1 ?g ml?1) stimulated anthocyanin formation in the cotyledons but higher than 1 ?g ml?1 MC-LR concentrations strongly inhibited it. The CYN treated chlorotic cotyledons were violet coloured in consequence of high level of anthocyanins, while MC-LR induced chlorosis was accompanied by the appearance of necrotic patches. Necrosis and increases of peroxidase enzyme activity (POD) are general stress responses but these alterations were characteristic only for MC-LR treated mustard plants. These findings provide experimental evidences of developmental alterations induced by protein synthesis and protein phosphatase inhibitory cyanotoxins (CYN and MC-LR) in a model dicotyledonous plant.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban microcystin-LR Sinapis alba
Megjelenés:	Acta Biologica Hungarica. - 61 : Suppl. 5 (2010), p. 35-48. -
További szerzők:	Máthé Csaba (1966-) (biológus) Vasas Gábor (1975-) (biológus-vegyész) Jámbrik Katalin Papp Mária (1952-) (biológus, botanikus) Beyer Dániel (1982-) (molekuláris biológus) Mészáros Ilona (1952-) (biológus) Borbély György (1943-) (biológus)
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001-es BibID:	BIBFORM057689
Első szerző:	Tóth János Attila (ökológus)
Cím:	The Effects of Climate Change on Element Content and Soil pH (Síkfőkút DIRT Project, Northern Hungary) / János Attila Tóth, Péter Tamás Nagy, Zsolt Krakomperger, Zsuzsa Veres, Zsolt Kotroczó, Sándorné Kincses, István Fekete, Mária Papp, Ilona Mészáros, Viktor Oláh
Dátum:	2013
Megjegyzések:	In the Detritus Inputs and Removal Treatment (DIRT) field experimentsestablished at the Síkf}okút Site (northern Hungary) in October 2000, an experimentalapproach was applied to study long-term effects of litter quality and quantityon pH and nutrient mobility of soil in a Quercetum petraeae-cerris forest. Ourprevious results have suggested that decreases in organic matter content, total N,Ca2+ and Mg2+ concentrations in the soil are the consequence of the reduction inforest litter production induced by climate change and the resultant soil degradationover a longer period. An eight-year litter manipulation demonstrated a relationbetween soil pH and Mg2+ and Ca2+ concentrations in the soil. The reduction of litterproduction resulted in a decrease of the soil pH which occurred due to the decreasingMg2+ and Ca2+ inputs into the soil, and consequent reduction of soil bufferingcapacity against the acidifying effects of the acidic intermediates of litter decompositionand humus compounds. If the litter production increases as a result ofclimate change, it should be accompanied by increasing C, total N, Ca2+ and Mg2+contents in the soil and soil pH, with a positive effect on the soil organic matter andfertility. However, this scenario is rather unlikely as our results indicated decreasinglitter production in the measurement period.
ISBN:	978-3-642-12725-0
Tárgyszavak:	Természettudományok Környezettudományok könyvfejezet climate change DIRT Project soil element content
Megjelenés:	The Carpathians : Integrating Nature and Society Towards Sustainability. Environmental Science and Engineering / ed. Jacek Kozak, Katarzyna Ostapowicz, Andrzej Bytnerowicz, Bartłomiej Wyżga. - p. 77-88. -
További szerzők:	Nagy Péter Tamás (1970-) (vegyész) Krakomperger Zsolt (1980-) (biológia tanár) Veres Zsuzsa (1984-) (környezetkutató) Kotroczó Zsolt (1975-) (biológus, ökológus) Kincses Sándorné (1964-) (agrokémia) Fekete István (1986-) (élelmiszerminőség-biztosító agrármérnök) Papp Mária (1952-) (biológus, botanikus) Mészáros Ilona (1952-) (biológus) Oláh Viktor (1980-) (biológus)
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