Seasonal variation of freezing resistance mechanisms in north-temperate alpine plants

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10372917" target="_blank" >RIV/00216208:11310/17:10372917 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s00035-016-0174-6" target="_blank" >http://dx.doi.org/10.1007/s00035-016-0174-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00035-016-0174-6" target="_blank" >10.1007/s00035-016-0174-6</a>

Result language

angličtina

Original language name

Seasonal variation of freezing resistance mechanisms in north-temperate alpine plants

Original language description

Alpine herbaceous plants employ two mechanisms to prevent freezing injury to leaves during the growing season, i.e., they avoid freezing by transient supercooling or tolerate the occurrence of extracellular ice. I examined seasonal changes in the two freezing resistance mechanisms in leaves of alpine plants from two temperate mountain regions, Niwot Ridge (3500 m) in the Front Range of the Rocky Mts. (USA) and Modr, sedlo (1510 m) in the Giant Mts. (Czech Republic). Although plants from Niwot Ridge were on average ca. 2.6 K more resistant to freezing than plants from the Giant Mts., patterns of freezing resistance changes during the growing season were consistent between the two regions. Both freezing resistance mechanisms, i.e., avoidance by supercooling and tolerance of extracellular ice were encountered. Plants predominantly avoided freezing injury during early summer and tolerated extracellular freezing at the end of the growing season, and the seasonal change from avoidance to tolerance mechanisms was significant for both regions. The avoidance and tolerance mechanisms provided comparable freezing resistance to the plants during early summer but, unlike in avoidant plants, in tolerant plants resistance increased over the course of the season. The species formed three groups with regard to resistance mechanisms employed during the season: (1) species that avoided injury by supercooling during early summer and employed freezing tolerance towards autumn; (2) species that were freezing tolerant during the entire growing season; and (3) species with ephemeral shoots that solely avoided freezing by supercooling. Although freezing tolerance is a common feature in north-temperate alpine plants, avoidance by supercooling as a freezing resistance strategy might be selected for in species with particular life histories such as ephemeral hemiparasites.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10611 - Plant sciences, botany

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Alpine Botany

ISSN

1664-2201

e-ISSN

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Volume of the periodical

127

Issue of the periodical within the volume

1

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

31-39

UT code for WoS article

000398467800003

EID of the result in the Scopus database

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