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Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies

Water-saver and water-spender strategies are successful adaptations allowing plants to cope with the limitations of hot desert habitats. We investigated whether the efficacy of the cuticular transpiration barrier and its susceptibility to high temperatures are ecophysiological traits differentially...

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Autores principales: Bueno, Amauri, Alfarhan, Ahmed, Arand, Katja, Burghardt, Markus, Deininger, Ann-Christin, Hedrich, Rainer, Leide, Jana, Seufert, Pascal, Staiger, Simona, Riederer, Markus
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416792/
https://www.ncbi.nlm.nih.gov/pubmed/30715440
http://dx.doi.org/10.1093/jxb/erz018
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author Bueno, Amauri
Alfarhan, Ahmed
Arand, Katja
Burghardt, Markus
Deininger, Ann-Christin
Hedrich, Rainer
Leide, Jana
Seufert, Pascal
Staiger, Simona
Riederer, Markus
author_facet Bueno, Amauri
Alfarhan, Ahmed
Arand, Katja
Burghardt, Markus
Deininger, Ann-Christin
Hedrich, Rainer
Leide, Jana
Seufert, Pascal
Staiger, Simona
Riederer, Markus
author_sort Bueno, Amauri
collection PubMed
description Water-saver and water-spender strategies are successful adaptations allowing plants to cope with the limitations of hot desert habitats. We investigated whether the efficacy of the cuticular transpiration barrier and its susceptibility to high temperatures are ecophysiological traits differentially developed in the water-spender Citrullus colocynthis and the water-saver Phoenix dactylifera. Minimum leaf conductance (g(min)) at 25 °C was six times lower in P. dactylifera (1.1×10(–5) m s(–1)) than in C. colocynthis (6.9×10(–5) m s(–1)). Additionally, g(min) in the range 25–50 °C did not change in P. dactylifera but increased by a factor of 3.2 in C. colocynthis. Arrhenius formalism applied to the C. colocynthis g(min) led to a biphasic graph with a steep increase at temperatures ≥35 °C, whereas for P. dactylifera the graph was linear over all temperatures. Leaf cuticular wax coverage amounted to 4.2±0.4 µg cm(–2) for C. colocynthis and 29.4±4.2 µg cm(–2) for P. dactylifera. In both species, waxes were mainly composed of very-long-chain aliphatics. Midpoints of the wax melting ranges of P. dactylifera and C. colocynthis were 80 °C and 73 °C, respectively. We conclude that in P. dactylifera a particular wax and cutin chemistry prevents the rise of g(min) at elevated temperatures.
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spelling pubmed-64167922019-03-19 Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies Bueno, Amauri Alfarhan, Ahmed Arand, Katja Burghardt, Markus Deininger, Ann-Christin Hedrich, Rainer Leide, Jana Seufert, Pascal Staiger, Simona Riederer, Markus J Exp Bot Research Papers Water-saver and water-spender strategies are successful adaptations allowing plants to cope with the limitations of hot desert habitats. We investigated whether the efficacy of the cuticular transpiration barrier and its susceptibility to high temperatures are ecophysiological traits differentially developed in the water-spender Citrullus colocynthis and the water-saver Phoenix dactylifera. Minimum leaf conductance (g(min)) at 25 °C was six times lower in P. dactylifera (1.1×10(–5) m s(–1)) than in C. colocynthis (6.9×10(–5) m s(–1)). Additionally, g(min) in the range 25–50 °C did not change in P. dactylifera but increased by a factor of 3.2 in C. colocynthis. Arrhenius formalism applied to the C. colocynthis g(min) led to a biphasic graph with a steep increase at temperatures ≥35 °C, whereas for P. dactylifera the graph was linear over all temperatures. Leaf cuticular wax coverage amounted to 4.2±0.4 µg cm(–2) for C. colocynthis and 29.4±4.2 µg cm(–2) for P. dactylifera. In both species, waxes were mainly composed of very-long-chain aliphatics. Midpoints of the wax melting ranges of P. dactylifera and C. colocynthis were 80 °C and 73 °C, respectively. We conclude that in P. dactylifera a particular wax and cutin chemistry prevents the rise of g(min) at elevated temperatures. Oxford University Press 2019-02-15 2019-01-30 /pmc/articles/PMC6416792/ /pubmed/30715440 http://dx.doi.org/10.1093/jxb/erz018 Text en © The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Papers
Bueno, Amauri
Alfarhan, Ahmed
Arand, Katja
Burghardt, Markus
Deininger, Ann-Christin
Hedrich, Rainer
Leide, Jana
Seufert, Pascal
Staiger, Simona
Riederer, Markus
Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies
title Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies
title_full Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies
title_fullStr Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies
title_full_unstemmed Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies
title_short Effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies
title_sort effects of temperature on the cuticular transpiration barrier of two desert plants with water-spender and water-saver strategies
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416792/
https://www.ncbi.nlm.nih.gov/pubmed/30715440
http://dx.doi.org/10.1093/jxb/erz018
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