Resistance to freezing in three Eucalyptus globulus Labill subspecies

The resistance to low temperatures was assessed in seedlings of three subspecies of E. globulus (ssp globulus, ssp bicostata and ssp maidenii) of two different provenances. Lethal temperature 50 (LT50) was obtained by measuring the electrolytic conductivity, nucleation and freezing temperatures were...

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Autores principales:	Moraga S.,Priscila, Escobar,René, Valenzuela A.,Sofía
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2006
Materias:	cold resistance ssp bicostata ssp globulus ssp maidenii
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300026
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spelling	oai:scielo:S0717-345820060003000262007-01-17Resistance to freezing in three Eucalyptus globulus Labill subspeciesMoraga S.,PriscilaEscobar,RenéValenzuela A.,Sofía cold resistance ssp bicostata ssp globulus ssp maidenii The resistance to low temperatures was assessed in seedlings of three subspecies of E. globulus (ssp globulus, ssp bicostata and ssp maidenii) of two different provenances. Lethal temperature 50 (LT50) was obtained by measuring the electrolytic conductivity, nucleation and freezing temperatures were obtained by thermal analysis and the total soluble carbohydrates concentration was determined through the phenol-sulphuric method. Results showed that the most resistant provenance corresponded to Bolaro Mountain of ssp maidenii with a LT50 lower than -9ºC. The provenance Moogora of ssp globulus, had a LT50 of -8.47ºC, which situates it, as the second most resistant to low temperatures. According to the nucleation and freezing temperatures, the results indicate that all the provenances analyzed evaded the formation of ice, except for Bolaro Mountain of ssp maidenii which was tolerant to freezing. Finally, an inverse correlation (r = -0.89) between the content of total soluble carbohydrates and the LT50 was found, indicating the cryoprotection effect of these in the resistance to low temperatures.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.9 n.3 20062006-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300026en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	cold resistance ssp bicostata ssp globulus ssp maidenii
spellingShingle	cold resistance ssp bicostata ssp globulus ssp maidenii Moraga S.,Priscila Escobar,René Valenzuela A.,Sofía Resistance to freezing in three Eucalyptus globulus Labill subspecies
description	The resistance to low temperatures was assessed in seedlings of three subspecies of E. globulus (ssp globulus, ssp bicostata and ssp maidenii) of two different provenances. Lethal temperature 50 (LT50) was obtained by measuring the electrolytic conductivity, nucleation and freezing temperatures were obtained by thermal analysis and the total soluble carbohydrates concentration was determined through the phenol-sulphuric method. Results showed that the most resistant provenance corresponded to Bolaro Mountain of ssp maidenii with a LT50 lower than -9ºC. The provenance Moogora of ssp globulus, had a LT50 of -8.47ºC, which situates it, as the second most resistant to low temperatures. According to the nucleation and freezing temperatures, the results indicate that all the provenances analyzed evaded the formation of ice, except for Bolaro Mountain of ssp maidenii which was tolerant to freezing. Finally, an inverse correlation (r = -0.89) between the content of total soluble carbohydrates and the LT50 was found, indicating the cryoprotection effect of these in the resistance to low temperatures.
author	Moraga S.,Priscila Escobar,René Valenzuela A.,Sofía
author_facet	Moraga S.,Priscila Escobar,René Valenzuela A.,Sofía
author_sort	Moraga S.,Priscila
title	Resistance to freezing in three Eucalyptus globulus Labill subspecies
title_short	Resistance to freezing in three Eucalyptus globulus Labill subspecies
title_full	Resistance to freezing in three Eucalyptus globulus Labill subspecies
title_fullStr	Resistance to freezing in three Eucalyptus globulus Labill subspecies
title_full_unstemmed	Resistance to freezing in three Eucalyptus globulus Labill subspecies
title_sort	resistance to freezing in three eucalyptus globulus labill subspecies
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300026
work_keys_str_mv	AT moragaspriscila resistancetofreezinginthreeeucalyptusglobuluslabillsubspecies AT escobarrene resistancetofreezinginthreeeucalyptusglobuluslabillsubspecies AT valenzuelaasofia resistancetofreezinginthreeeucalyptusglobuluslabillsubspecies
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Resistance to freezing in three Eucalyptus globulus Labill subspecies

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