. . "Mineral nutrient economy in Sphagnum mosses"@en . . . . " uptake" . "Sphagnum" . "2007-12-01+01:00"^^ . . . "2009-04-03+02:00"^^ . "Bun\u011B\u010Dn\u00E9 st\u011Bny ra\u0161elin\u00EDk\u016F produkuj\u00ED polysacharid sphagnan, kter\u00FD jim prop\u016Fj\u010Duje dv\u011B v\u00FDjime\u010Dn\u00E9 vlastnosti t\u00FDkaj\u00EDc\u00ED se hospoda\u0159en\u00ED s kationty a dus\u00EDkem v prost\u0159ed\u00ED. Je to ji\u017E d\u0159\u00EDve popsan\u00E1 (i) velk\u00E1 kapacita kationtov\u00E9 v\u00FDm\u011Bny a znovuobjeven\u00E1 (ii) schopnost imobilizovat formy redukovan\u00E9ho dus\u00EDku prost\u0159ednictv\u00EDm reaktivn\u00EDch karbonylov\u00FDch skupin. V\u00FDznam imobilizace dus\u00EDku byl doposud ve v\u0161ech studi\u00EDch o ekologii a ekofyziologii ra\u0161elini\u0161\u0165, p\u0159\u00EDtomn\u00FDch rostlin, ra\u0161elin\u00EDk\u016F i dekompozitor\u016F, zcela opom\u00EDjen. V\u00FDsledky projektu vy\u010D\u00EDsl\u00ED u \u0161esti ekologicky odli\u0161n\u00FDch druh\u016F ra\u0161elin\u00EDk\u016F potenci\u00E1ln\u00ED imobiliza\u010Dn\u00ED i v\u00FDm\u011Bnnou kapacitu sphagnanu. Na vrchovi\u0161t\u00EDch budou v ra\u0161elin\u00EDc\u00EDch sledov\u00E1na aktu\u00E1ln\u00ED mno\u017Estv\u00ED imobilizovan\u00FDch a vym\u011Bniteln\u00FDch forem dus\u00EDku a kationt\u016F v z\u00E1vislostech na druhu, fyziologick\u00E9m stavu vertik\u00E1ln\u011B polarizovan\u00E9 st\u00E9lky a gradientu atmosf\u00E9rick\u00E9 depozice dus\u00EDku a ostatn\u00EDch kationt\u016F. Bude tak vy\u010D\u00EDslen v\u00FDznam \u017Eiv\u00FDch bun\u011Bk, kationtov\u00E9 v\u00FDm\u011Bny a imobilizace v hospoda\u0159en\u00ED ra\u0161elin\u00EDk\u016F s makroprvky." . . " sequestration" . " cation exchange capacity" . . "0"^^ . " phosphorus" . "http://www.isvav.cz/projectDetail.do?rowId=KJB600050503"^^ . . . . "2005-01-01+01:00"^^ . "1"^^ . " nitrogen" . . . " potassium" . "4"^^ . "1. We characterized exchangeable fraction of the total mineral nutrient content in ombrotrophic Sphagnum species. 2. Sphagnum decay is inhibited by carboxyls from cell wall hemicellulose, not by phenolic polymers. In other mosses it is opposite."@en . "0"^^ . "4"^^ . " galacturonic acid" . . " bulk deposition" . " bog" . "KJB600050503" . . " calcium" . . " immobilisation" . " hollow" . "2007-02-27+01:00"^^ . . "1. Charakterizovali jsme iontov\u00FDm\u011Bnnou slo\u017Eku celkov\u00E9ho obsahu miner\u00E1ln\u00EDch \u017Eivin ombrotrotrofn\u00EDch ra\u0161elin\u00EDk\u016F. 2. Rozklad ra\u0161elin\u00EDk\u016F je inhibov\u00E1n karboxyly hemicelul\u00F3zy bun\u011B\u010Dn\u00FDch st\u011Bn, nikoli fenolick\u00FDmi polymery. U jin\u00FDch mech\u016F je tomu naopak."@cs . " sodium" . . " sphagnan" . "Sphagnum; mineral nutrition; sphagnan; cell wall; galacturonic acid; nitrogen; calcium; magnesium; potassium; sodium; phosphorus; cation exchange capacity; immobilisation; sequestration; uptake; bulk deposition; bog; hummock; hollow; lawn"@en . " mineral nutrition" . . "Spagnul cell walls produce sphagnan, a polysaccharide which imparts to them two exceptional properties concerning their economy with cations and nitrogen in the environment. It si (i) high cation exchange capacity, described long time ago, and (ii) ability to immobilize all forms of reduced nitrogen through reactive carbonyl groups, rediscovered recenty. The importance of nitrogen immobilization in bog ecology and ecophysiology of bog plants, Sphagnum mosses or decomposers has completely been neglected up to now. Project results wil quantify potential exchange and immobilization capacity of sphagnan in six ecologically differenc Sphagnum species. Current content of immobilized and exchangeable forms of nitrogen and cations will be determined in Sphagnum species from peatbogs across gradients of bulk atmospheric deposition of nitrogen and other elements. Thus, we will evaluate the significance of living cells, cation exchange and immobilization in Sphagnum nutrient economy."@en . " cell wall" . "Hospoda\u0159en\u00ED ra\u0161elin\u00EDk\u016F s miner\u00E1ln\u00EDmi \u017Eivinami" . " magnesium" . " hummock" .