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001-es BibID:	BIBFORM082911
Első szerző:	Oláh Viktor (biológus)
Cím:	Comparative study on the sensitivity of turions and active fronds of giant duckweed (Spirodela polyrhiza (L.) Schleiden) to heavy metal treatments / Viktor Oláh, Anna Hepp, Ilona Mészáros
Dátum:	2015
ISSN:	0045-6535
Megjegyzések:	Standard ecotoxicological test procedures use only active forms of aquatic plants. The potential effects of toxicants on vegetative propagules, which play an important role in the survival of several aquatic plant species, is not well understood. Because turion-like resting propagules overwinter on the water bottom in temperate regions, they could be exposed to contaminants for longer periods than active plants. Due to its turion producing capability, giant duckweed (Spirodela polyrhiza) is widely used in studying morphogenesis, dormancy, and activation mechanisms in plants. It is also suitable for ecotoxicological purposes. The present work aims to compare the growth inhibition sensitivity of active (normal frond) and overwintering (turion) forms of S. polyrhiza to concentrations of nickel (Ni), cadmium (Cd) and hexavalent chromium (Cr) ranging from 0 to 100 mg L?1. The results indicated that in general, resting turions have higher heavy metal tolerance than active fronds. Cd proved to be the most toxic heavy metal to S. polyrhiza active frond cultures because it induced rapid turion formation. In contrast, the toxicity of Ni and Cr were found to be similar but lower than the effects of Cd. Cr treatments up to 10 mg L?1 did not result in any future negative effects on turion activation. Turions did not survive heavy metal treatments at higher concentrations of Cr. Cd and Ni treatments affected both the floating-up and germination of turions but did not significantly affect the vigor of sprouts. Higher concentrations (of 100 mg L?1) Cd completely inhibited germination.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Spirodela polyrhiza telelőrügy vegetatív propagulum békalencse teszt növekedésgátlás nehézfém
Megjelenés:	Chemosphere. - 132 (2015), p. 40-46. -
További szerzők:	Hepp Anna (1991-) (biotechnológus) Mészáros Ilona (1952-) (biológus)
Pályázati támogatás:	TÁMOP-4.2.2.B-10/1 TÁMOP TÁMOP- 4.2.3-12/1/KONV-2012-0048 TÁMOP TÁMOP-4.2.4. A/2-11-1-2012-0001 TÁMOP
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