A touch of frost? Cold hardiness of plants in the Southern Hemisphere
P. Bannister. New Zealand Journal of Botany, (2007)
Abstract
This review contrasts the frost resistance of plants from the Southern Hemisphere with that of the Northern Hemisphere and is principally concerned with plants from New Zealand, Australia, and South America. It gives a brief overview of methods for determining frost resistance in the field and in controlled environments with intact or excised plant parts. It considers various methods of determining frost resistance and the expression of critical temperatures causing damage, and discusses the problems of using excised plant parts and freezing of tissues. This review, however, is not principally concerned with physiological aspects of frost resistance, but more with biogeographic aspects of the environment and quantification of the relationships between frost resistance and temperature related factors such as altitude and latitude. It gives examples of differences in frost resistance between the two hemispheres and attributes these to the contrast between the climates of largely continental land masses in the Northern Hemisphere and the oceanic environment of the Southern Hemisphere. Furthermore, it also shows similarities between the frost resistance of plants from the Southern Hemisphere during the growing season and the maximum frost resistance of tropical alpine species and further similarities between species on oceanic islands in both hemispheres. Comprehensive lists of species' frost resistance are included in tables and appendices.
(private-note)Vital staining with tetrazolium salts, which you can then extract and quantify.
"Hard tissues that do not release electrolytes readily may give a spuriously high estimate of frost resistance, while futrher subdivision of samples releases more electrolytes and lowers the estimated frost resistance (Reitsma 1994)"
Fitting of non-linear regressions eg Taschler et al. 2004
Ä line drawn between the lowest temperature causing no damage and the highest temperature causing complete damage often intersects the midpoint of a symmetrical sigmoid curve"
The temperature at the top of the exotherm is the freezing temperature. The temperature at which the exotherm starts is dependent on supercooling (so what's the one to use???) (hrm. So an exotherm rises to the freezing temperature - which is dependent on what? - and then stabilises until all water is frozen? If water diffuses slowly, who's to say that it ever reaches its freezing temperature?)
%0 Journal Article
%1 citeulike:2183385
%A Bannister, P.
%D 2007
%J New Zealand Journal of Botany
%K alpine, altitude, antarctic, citeulikeExport climate, evolution, island, review, temperature
%P 1--33
%T A touch of frost? Cold hardiness of plants in the Southern Hemisphere
%U http://www.rsnz.org/publish/nzjb/2007/001.php
%V 45
%X This review contrasts the frost resistance of plants from the Southern Hemisphere with that of the Northern Hemisphere and is principally concerned with plants from New Zealand, Australia, and South America. It gives a brief overview of methods for determining frost resistance in the field and in controlled environments with intact or excised plant parts. It considers various methods of determining frost resistance and the expression of critical temperatures causing damage, and discusses the problems of using excised plant parts and freezing of tissues. This review, however, is not principally concerned with physiological aspects of frost resistance, but more with biogeographic aspects of the environment and quantification of the relationships between frost resistance and temperature related factors such as altitude and latitude. It gives examples of differences in frost resistance between the two hemispheres and attributes these to the contrast between the climates of largely continental land masses in the Northern Hemisphere and the oceanic environment of the Southern Hemisphere. Furthermore, it also shows similarities between the frost resistance of plants from the Southern Hemisphere during the growing season and the maximum frost resistance of tropical alpine species and further similarities between species on oceanic islands in both hemispheres. Comprehensive lists of species' frost resistance are included in tables and appendices.
@article{citeulike:2183385,
abstract = {{This review contrasts the frost resistance of plants from the Southern Hemisphere with that of the Northern Hemisphere and is principally concerned with plants from New Zealand, Australia, and South America. It gives a brief overview of methods for determining frost resistance in the field and in controlled environments with intact or excised plant parts. It considers various methods of determining frost resistance and the expression of critical temperatures causing damage, and discusses the problems of using excised plant parts and freezing of tissues. This review, however, is not principally concerned with physiological aspects of frost resistance, but more with biogeographic aspects of the environment and quantification of the relationships between frost resistance and temperature related factors such as altitude and latitude. It gives examples of differences in frost resistance between the two hemispheres and attributes these to the contrast between the climates of largely continental land masses in the Northern Hemisphere and the oceanic environment of the Southern Hemisphere. Furthermore, it also shows similarities between the frost resistance of plants from the Southern Hemisphere during the growing season and the maximum frost resistance of tropical alpine species and further similarities between species on oceanic islands in both hemispheres. Comprehensive lists of species' frost resistance are included in tables and appendices.}},
added-at = {2019-03-31T01:14:40.000+0100},
author = {Bannister, P.},
biburl = {https://www.bibsonomy.org/bibtex/2d7c1b99d6d015718bd76a5859522ce62/dianella},
citeulike-article-id = {2183385},
citeulike-linkout-0 = {http://www.rsnz.org/publish/nzjb/2007/001.php},
comment = {(private-note)Vital staining with tetrazolium salts, which you can then extract and quantify.
"Hard tissues that do not release electrolytes readily may give a spuriously high estimate of frost resistance, while futrher subdivision of samples releases more electrolytes and lowers the estimated frost resistance (Reitsma 1994)"
Fitting of non-linear regressions eg Taschler et al. 2004
"A line drawn between the lowest temperature causing no damage and the highest temperature causing complete damage often intersects the midpoint of a symmetrical sigmoid curve"
The temperature at the top of the exotherm is the freezing temperature. The temperature at which the exotherm starts is dependent on supercooling (so what's the one to use???) (hrm. So an exotherm rises to the freezing temperature - which is dependent on what? - and then stabilises until all water is frozen? If water diffuses slowly, who's to say that it ever reaches its freezing temperature?)},
interhash = {245a7016b304d163112cc617dc0f9b6d},
intrahash = {d7c1b99d6d015718bd76a5859522ce62},
journal = {New Zealand Journal of Botany},
keywords = {alpine, altitude, antarctic, citeulikeExport climate, evolution, island, review, temperature},
pages = {1--33},
posted-at = {2007-12-31 11:57:28},
priority = {2},
timestamp = {2019-03-31T01:16:26.000+0100},
title = {{A touch of frost? Cold hardiness of plants in the Southern Hemisphere}},
url = {http://www.rsnz.org/publish/nzjb/2007/001.php},
volume = 45,
year = 2007
}