Seasonal and altitudinal variation of ericoid shrub freezing resistance in temperate bogs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10337348" target="_blank" >RIV/00216208:11310/16:10337348 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/16:00503116 RIV/61389030:_____/16:00503116

Výsledek na webu

<a href="http://www.npsumava.cz/gallery/34/10345-sg_22_daneketal.pdf" target="_blank" >http://www.npsumava.cz/gallery/34/10345-sg_22_daneketal.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Seasonal and altitudinal variation of ericoid shrub freezing resistance in temperate bogs

Popis výsledku v původním jazyce

Changes in freezing resistance and its mechanisms (i.e., avoidance by supercooling or tolerance of ice formation) were studied in two deciduous (Vaccinium myrtillus, V. uliginosum) and two evergreen (V. vitis-idaea, Oxycoccus palustris) ericoid shrubs at two elevations (470 m and 1070 m a.s.l.) throughout the growing season. The temperature causing 50% damage (i.e. Lt50) and nucleation temperature at which ice was formed in the tissues (i.e. exotherm) were measured. The aim was to investigate whether the freezing resistance varied during the growing season and whether the changes were determined by elevation. Freezing resistance declined from the spring to the summer (late May to August) and then it increased toward the end of the season. In half of the cases the resistance remained comparable between the summer (August) and the early autumn (September). The majority of plants were tolerant during most of the season and avoidance occurred only in early or late May. There was no distinct elevational difference in plant freezing resistance between the localities, since the plants from higher elevation were more resistant only in September. Hence, the greatest risk of frost injury was found during the early weeks of the growing season when the ericoid shrubs develop new leaves.

Název v anglickém jazyce

Seasonal and altitudinal variation of ericoid shrub freezing resistance in temperate bogs

Popis výsledku anglicky

Changes in freezing resistance and its mechanisms (i.e., avoidance by supercooling or tolerance of ice formation) were studied in two deciduous (Vaccinium myrtillus, V. uliginosum) and two evergreen (V. vitis-idaea, Oxycoccus palustris) ericoid shrubs at two elevations (470 m and 1070 m a.s.l.) throughout the growing season. The temperature causing 50% damage (i.e. Lt50) and nucleation temperature at which ice was formed in the tissues (i.e. exotherm) were measured. The aim was to investigate whether the freezing resistance varied during the growing season and whether the changes were determined by elevation. Freezing resistance declined from the spring to the summer (late May to August) and then it increased toward the end of the season. In half of the cases the resistance remained comparable between the summer (August) and the early autumn (September). The majority of plants were tolerant during most of the season and avoidance occurred only in early or late May. There was no distinct elevational difference in plant freezing resistance between the localities, since the plants from higher elevation were more resistant only in September. Hence, the greatest risk of frost injury was found during the early weeks of the growing season when the ericoid shrubs develop new leaves.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Silva Gabreta

ISSN

1211-7420

e-ISSN

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Svazek periodika

22

Číslo periodika v rámci svazku

podzim 2016

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

11

Strana od-do

63-73

Kód UT WoS článku

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EID výsledku v databázi Scopus

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