Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity

Plants can avoid freezing damage by preventing extracellular ice formation below the equilibrium freezing temperature (supercooling). We used Olea europaea cultivars to assess which traits contribute to avoid ice nucleation at sub-zero temperatures. Seasonal leaf water relations, non-structural carb...

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Autores principales:	Arias, N.S., Bucci, S.J., Scholz, F.G., Goldstein, G.
Formato:	JOUR
Materias:	Freezing resistance Ice nucleation LT<inf>50</inf> Non-structural carbohydrate Olive acclimation carbohydrate cultivar evergreen tree freezing nucleation solute Patagonia Olea europaea water acclimatization cell membrane cell wall cold metabolism olive tree osmosis physiology season transport at the cellular level Acclimatization Biological Transport Cell Membrane Cell Wall Cold Temperature Freezing Olea Osmosis Seasons Water
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_01407791_v38_n10_p2061_Arias
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_01407791_v38_n10_p2061_Arias
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spelling	todo:paper_01407791_v38_n10_p2061_Arias2023-10-03T14:58:30Z Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity Arias, N.S. Bucci, S.J. Scholz, F.G. Goldstein, G. Freezing resistance Ice nucleation LT<inf>50</inf> Non-structural carbohydrate Olive acclimation carbohydrate cultivar evergreen tree freezing nucleation solute Patagonia Olea europaea water acclimatization cell membrane cell wall cold freezing metabolism olive tree osmosis physiology season transport at the cellular level Acclimatization Biological Transport Cell Membrane Cell Wall Cold Temperature Freezing Olea Osmosis Seasons Water Plants can avoid freezing damage by preventing extracellular ice formation below the equilibrium freezing temperature (supercooling). We used Olea europaea cultivars to assess which traits contribute to avoid ice nucleation at sub-zero temperatures. Seasonal leaf water relations, non-structural carbohydrates, nitrogen and tissue damage and ice nucleation temperatures in different plant parts were determined in five cultivars growing in the Patagonian cold desert. Ice seeding in roots occurred at higher temperatures than in stems and leaves. Leaves of cold acclimated cultivars supercooled down to -13°C, substantially lower than the minimum air temperatures observed in the study site. During winter, leaf ice nucleation and leaf freezing damage (LT<inf>50</inf>) occurred at similar temperatures, typical of plant tissues that supercool. Higher leaf density and cell wall rigidity were observed during winter, consistent with a substantial acclimation to sub-zero temperatures. Larger supercooling capacity and lower LT<inf>50</inf> were observed in cold-acclimated cultivars with higher osmotically active solute content, higher tissue elastic adjustments and lower apoplastic water. Irreversible leaf damage was only observed in laboratory experiments at very low temperatures, but not in the field. A comparative analysis of closely related plants avoids phylogenetic independence bias in a comparative study of adaptations to survive low temperatures. © 2015 John Wiley & Sons Ltd. Fil:Bucci, S.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Scholz, F.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Goldstein, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01407791_v38_n10_p2061_Arias
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Freezing resistance Ice nucleation LT<inf>50</inf> Non-structural carbohydrate Olive acclimation carbohydrate cultivar evergreen tree freezing nucleation solute Patagonia Olea europaea water acclimatization cell membrane cell wall cold freezing metabolism olive tree osmosis physiology season transport at the cellular level Acclimatization Biological Transport Cell Membrane Cell Wall Cold Temperature Freezing Olea Osmosis Seasons Water
spellingShingle	Freezing resistance Ice nucleation LT<inf>50</inf> Non-structural carbohydrate Olive acclimation carbohydrate cultivar evergreen tree freezing nucleation solute Patagonia Olea europaea water acclimatization cell membrane cell wall cold freezing metabolism olive tree osmosis physiology season transport at the cellular level Acclimatization Biological Transport Cell Membrane Cell Wall Cold Temperature Freezing Olea Osmosis Seasons Water Arias, N.S. Bucci, S.J. Scholz, F.G. Goldstein, G. Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity
topic_facet	Freezing resistance Ice nucleation LT<inf>50</inf> Non-structural carbohydrate Olive acclimation carbohydrate cultivar evergreen tree freezing nucleation solute Patagonia Olea europaea water acclimatization cell membrane cell wall cold freezing metabolism olive tree osmosis physiology season transport at the cellular level Acclimatization Biological Transport Cell Membrane Cell Wall Cold Temperature Freezing Olea Osmosis Seasons Water
description	Plants can avoid freezing damage by preventing extracellular ice formation below the equilibrium freezing temperature (supercooling). We used Olea europaea cultivars to assess which traits contribute to avoid ice nucleation at sub-zero temperatures. Seasonal leaf water relations, non-structural carbohydrates, nitrogen and tissue damage and ice nucleation temperatures in different plant parts were determined in five cultivars growing in the Patagonian cold desert. Ice seeding in roots occurred at higher temperatures than in stems and leaves. Leaves of cold acclimated cultivars supercooled down to -13°C, substantially lower than the minimum air temperatures observed in the study site. During winter, leaf ice nucleation and leaf freezing damage (LT<inf>50</inf>) occurred at similar temperatures, typical of plant tissues that supercool. Higher leaf density and cell wall rigidity were observed during winter, consistent with a substantial acclimation to sub-zero temperatures. Larger supercooling capacity and lower LT<inf>50</inf> were observed in cold-acclimated cultivars with higher osmotically active solute content, higher tissue elastic adjustments and lower apoplastic water. Irreversible leaf damage was only observed in laboratory experiments at very low temperatures, but not in the field. A comparative analysis of closely related plants avoids phylogenetic independence bias in a comparative study of adaptations to survive low temperatures. © 2015 John Wiley & Sons Ltd.
format	JOUR
author	Arias, N.S. Bucci, S.J. Scholz, F.G. Goldstein, G.
author_facet	Arias, N.S. Bucci, S.J. Scholz, F.G. Goldstein, G.
author_sort	Arias, N.S.
title	Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity
title_short	Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity
title_full	Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity
title_fullStr	Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity
title_full_unstemmed	Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity
title_sort	freezing avoidance by supercooling in olea europaea cultivars: the role of apoplastic water, solute content and cell wall rigidity
url	http://hdl.handle.net/20.500.12110/paper_01407791_v38_n10_p2061_Arias
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Freezing avoidance by supercooling in Olea europaea cultivars: The role of apoplastic water, solute content and cell wall rigidity

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