"arsenic; arsenic compounds; speciation; fractionation; soil; plants; mineral composition; rhizospher"@en . "http://www.isvav.cz/projectDetail.do?rowId=GA205/06/0298"^^ . . . . . . " fractionation" . . " arsenic compounds" . " plants" . "Geochemical, pedological, and biological aspects of bioavailability of arsenic and arsenic compounds for plants"@en . "Arsen pat\u0159\u00ED mezi intenzivn\u011B sledovan\u00E9 rizikov\u00E9 prvky z\u00A0d\u016Fvodu jeho toxicity pro \u010Dlov\u011Bka i zv\u00ED\u0159ata. Chov\u00E1n\u00ED tohoto prvku v\u00A0p\u016Fd\u011B, tedy jeho pohyb mezi z\u00E1kladn\u00EDmi p\u016Fdn\u00EDmi frakcemi, p\u0159ijatelnost tohoto prvku a jeho slou\u010Denin rostlinami a jeho translokace a transformace v\u00A0jednotliv\u00FDch rostlinn\u00FDch tk\u00E1n\u00EDch st\u00E1le nen\u00ED zcela objasn\u011Bno. V\u00A0r\u00E1mci p\u0159edkl\u00E1dan\u00E9ho projektu p\u0159edpokl\u00E1d\u00E1me vy\u0159e\u0161en\u00ED n\u00E1sleduj\u00EDc\u00EDch \u00FAkol\u016F: (i) Detailn\u011B popsat miner\u00E1ln\u00ED slo\u017Een\u00ED podlo\u017En\u00EDch hornin a p\u016Fd na m\u00EDstech se zv\u00FD\u0161en\u00FDm obsahem arsenu a sledovat jej\u00ED vliv na mobilitu arsenu a distribuci tohoto prvku do z\u00E1kladn\u00EDch p\u016Fdn\u00EDch frakc\u00ED. (ii) Sledovat chov\u00E1n\u00ED arsenu v\u00A0oblasti rhizosf\u00E9ry v\u00A0z\u00E1vislosti na slo\u017Een\u00ED p\u016Fdy, speciaci arsenu a druhu p\u011Bstovan\u00E9 rostliny. (iii) Objasn\u011Bn\u00ED mechanismu p\u0159\u00EDjmu arsenu rostlinami v\u00A0z\u00E1vislosti na celkov\u00E9m obsahu i na obsahu jednotliv\u00FDch slou\u010Denin tohoto prvku v\u00A0p\u016Fd\u011B. (iv) Hodnocen\u00ED vlivu hyperakumul\u00E1tor\u016F arsenu na \u00FArove\u0148 kontaminace pokusn\u00E9 p\u016Fdy, fytoremedia\u010Dn\u00ED \u00FA\u010Dinnosti t\u011Bchto rostlin a princip\u016F p\u0159\u00EDjmu a" . "2008-12-31+01:00"^^ . "V pr\u016Fb\u011Bhu t\u0159\u00ED let \u0159e\u0161en\u00ED byla provedena vz\u00E1jemn\u011B p\u0159esn\u011B propojen\u00E1 \u0159ada experiment\u016F, kter\u00E1 sledovala chov\u00E1n\u00ED arsenu jak z mineralogick\u00E9ho a geochemick\u00E9ho hlediska, kdy byla potvrzena souvislost mobility arsenu s obsahem fosfore\u010Dnan\u016F, p\u0159i\u010Dem\u017E tento poznate"@cs . . " soil" . . "GA205/06/0298" . . . . . "17"^^ . "17"^^ . "2009-10-22+02:00"^^ . "During three years of investigation a set of experiments were provided following the behavior of arsenic from mineralogical and geochemical point of view where close relationships between arsenic mobility and phosphate content was observed. These results"@en . "arsenic" . . . . "2008-04-25+02:00"^^ . "2006-01-01+01:00"^^ . " mineral composition" . . "1"^^ . . "1"^^ . . . " speciation" . "Geochemick\u00E9, pedologick\u00E9 a biologick\u00E9 aspekty p\u0159\u00EDstupnosti arsenu a jeho slou\u010Denin pro rostliny" . "Arsenic belongs to the most intensively investigated potentially toxic elements because of its toxicity for humans and animals. However, informations concerning arsenic behavior in soil, fluctuation of arsenic among main soil fractions, availability of arsenic and its compounds for plants, and transformation and translocation of these compounds within plant are limited. Within proposed project following research objectives were designed: (i) Detailed characterization of mineral composition of bedrock and soils at locations with elevated concentration of\u00A0 arsenic and the determination of their effect on arsenic mobility, and distribution into main soil fractions. (ii) Investigation of behavior of arsenic and its compounds in plant rhizosphere as affected by soil composition, arsenic speciation, and plant species. (iii) Elucidation of mechanisms of uptake of individual arsenic compounds by experimental plants as influenced by arsenic content and speciation in soil. (iv) Assessment of possible"@en . "0"^^ . .