. "Martinkov\u00E1, Milena" . "Kru\u0161n\u00E9 hory Mts., trees, mechanical stress, Betula pendula, ecological pessimum"@en . . . . "Histological symptoms of birch mortification in Kru\u0161n\u00E9 hory Mts."@en . . "Most" . "63" . "741773" . . . "At the beginning of July 1998, samples of birch trees were taken (whole above-ground systems) representing the most frequent manifestations of health conditions in the top parts of the Kru\u0161n\u00E9 hory Mts. Evaluation of tissues and organs of the samples was caried out from the viewpoint of growth and readiness for specific functions. It was shown that trees were permanently damaged by mechanical stress in crowns (branch and shoot breakage, damage to leaves) and particularly at the base of stems and within stems where cambium and conducting tissues were damaged by repeating freezing and thawing of water. As a result of the interruption of conducting tissues/ways flushed leaves prematurely turned yellow (due to drought) and died out. Betula pendula Roth. occurs here under the effect of the cascade of stresses of the long-term ecological pessimum intensified by environment pollution. It is necessary to find advisetle species and their ecotypes."@en . . . "Histological symptoms of birch mortification in Kru\u0161n\u00E9 hory Mts."@en . "8"^^ . . "Histologick\u00E9 symptomy odum\u00EDr\u00E1n\u00ED b\u0159\u00EDzy v Kru\u0161n\u00FDch hor\u00E1ch."@cs . . "Problematika zachov\u00E1n\u00ED porost\u016F n\u00E1hradn\u00EDch d\u0159evin v imisn\u00ED oblasti Kru\u0161n\u00FDch hor." . "Mad\u011Bra, Petr" . "2"^^ . "Histologick\u00E9 symptomy odum\u00EDr\u00E1n\u00ED b\u0159\u00EDzy v Kru\u0161n\u00FDch hor\u00E1ch." . "Most" . "Z(MSM 434100005)" . "Histologick\u00E9 symptomy odum\u00EDr\u00E1n\u00ED b\u0159\u00EDzy v Kru\u0161n\u00FDch hor\u00E1ch."@cs . . "RIV/62156489:43410/99:41400005" . . . "Martinkov\u00E1, Milena" . "43410" . "Mad\u011Bra, Petr" . "2"^^ . "Histologick\u00E9 symptomy odum\u00EDr\u00E1n\u00ED b\u0159\u00EDzy v Kru\u0161n\u00FDch hor\u00E1ch." . "80-238-3900-4" . . "[CBB2963C30E9]" . "RIV/62156489:43410/99:41400005!RIV/2000/MSM/434100" . "Za\u010D\u00E1tkem \u010Dervence byly odebr\u00E1ny vzorn\u00EDky b\u0159\u00EDz reprezentuj\u00EDc\u00ED nej\u010Dast\u011Bj\u0161\u00ED p\u0159\u00EDznaky po\u0161kozen\u00ED ve vrcholov\u00FDch \u010D\u00E1stech Kru\u0161n\u00FDch hor. Hodnocen\u00ED pletiv a org\u00E1n\u016F vzorn\u00EDk\u016F bylo prov\u00E1d\u011Bno z hlediska r\u016Fstu a p\u0159ipravenosti ke specifick\u00FDm funkc\u00EDm. Bylo pozorov\u00E1no, \u017Ee stromy byly permanentn\u011B po\u0161kozov\u00E1ny mechanick\u00FDm stresem v korun\u00E1ch (pol\u00E1man\u00E9 v\u011Btve a pr\u00FDty, po\u0161kozen\u00E9 list\u00ED) a zejm\u00E9na na b\u00E1zi kmen\u016F, kde byly kambium a vodiv\u00E1 pletiva po\u0161kozov\u00E1ny opakovan\u00FDmi f\u00E1zemi t\u00E1n\u00ED a tuhnut\u00ED vody. V\u00FDsledkem p\u0159eru\u0161en\u00ED vodiv\u00FDch drah vyra\u0161en\u00E9 listy p\u0159ed\u010Dasn\u011B ze\u017Eloutly (v d\u016Fsledku sucha) a odum\u0159ely. Betula pendula Roth. se zde vyskytuje pod vliverm kask\u00E1dy stres\u016F v dlouhodob\u00E9m ekologick\u00E9m pesimu zv\u00FDrazn\u011Bn\u00E9m atmosf\u00E9rick\u00FDmi polucemi. Je nutn\u00E9 hledat vhodn\u00E9 druhy a jejich ekotypy." . .