Desiccation tolerance in the Antarctic moss Sanionia uncinata

Abstract Background: One of the most extreme environments on our planet is the Maritime Antarctic territory, due to its low-water availability, which restricts the development of plants. Sanionia uncinata Hedw. (Amblystegiaceae), the main colonizer of the Maritime Antarctic, has effective mechanism...

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Autores principales:	Pizarro,Marisol, Contreras,Rodrigo A., Köhler,Hans, Zúñiga,Gustavo E.
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2019
Materias:	Antarctic mosses ABA Water stress Desiccation tolerance Maritime Antarctic
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602019000100243
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spelling	oai:scielo:S0716-976020190001002432019-10-10Desiccation tolerance in the Antarctic moss Sanionia uncinataPizarro,MarisolContreras,Rodrigo A.Köhler,HansZúñiga,Gustavo E. Antarctic mosses ABA Water stress Desiccation tolerance Maritime Antarctic Abstract Background: One of the most extreme environments on our planet is the Maritime Antarctic territory, due to its low-water availability, which restricts the development of plants. Sanionia uncinata Hedw. (Amblystegiaceae), the main colonizer of the Maritime Antarctic, has effective mechanisms to tolerate this environment. It has been described that the tolerance to desiccation is mediated by the hormone abscisic acid (ABA), antioxidants systems, accumulation of compatible solutes and proteins of the late embryogenesis abundant (LEA). However, to date, these mechanisms have not been described in S. uncinata. Therefore, in this work, we postulate that the tolerance to desiccation in the Antarctic moss S. uncinata is mediated by the accumulation of ABA, the osmolytes proline and glycine betaine, and dehydrins (an LEA class 11 proteins). To demonstrate our hypothesis, S. uncinata was subjected to desiccation for 24 h (loss in 95% of water content), and the effects on its physiological, photosynthetic, antioxidant and biochemical parameters were determined. Results: Our results showed an accumulation of ABA in response to water loss, and the activation of protective responses that involves an increment in levels of proline and glycine betaine, an increment in the activity of antioxidant enzymes such as SOD, CAT, APX and POD, and the accumulation of dehydrins proteins. Conclusion: The results showed, suggest that S. uncinata is a desiccation-tolerant moss, property mediated by high cellular plasticity regulated by ABA.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.52 20192019-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602019000100243en10.1186/s40659-019-0251-6
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Antarctic mosses ABA Water stress Desiccation tolerance Maritime Antarctic
spellingShingle	Antarctic mosses ABA Water stress Desiccation tolerance Maritime Antarctic Pizarro,Marisol Contreras,Rodrigo A. Köhler,Hans Zúñiga,Gustavo E. Desiccation tolerance in the Antarctic moss Sanionia uncinata
description	Abstract Background: One of the most extreme environments on our planet is the Maritime Antarctic territory, due to its low-water availability, which restricts the development of plants. Sanionia uncinata Hedw. (Amblystegiaceae), the main colonizer of the Maritime Antarctic, has effective mechanisms to tolerate this environment. It has been described that the tolerance to desiccation is mediated by the hormone abscisic acid (ABA), antioxidants systems, accumulation of compatible solutes and proteins of the late embryogenesis abundant (LEA). However, to date, these mechanisms have not been described in S. uncinata. Therefore, in this work, we postulate that the tolerance to desiccation in the Antarctic moss S. uncinata is mediated by the accumulation of ABA, the osmolytes proline and glycine betaine, and dehydrins (an LEA class 11 proteins). To demonstrate our hypothesis, S. uncinata was subjected to desiccation for 24 h (loss in 95% of water content), and the effects on its physiological, photosynthetic, antioxidant and biochemical parameters were determined. Results: Our results showed an accumulation of ABA in response to water loss, and the activation of protective responses that involves an increment in levels of proline and glycine betaine, an increment in the activity of antioxidant enzymes such as SOD, CAT, APX and POD, and the accumulation of dehydrins proteins. Conclusion: The results showed, suggest that S. uncinata is a desiccation-tolerant moss, property mediated by high cellular plasticity regulated by ABA.
author	Pizarro,Marisol Contreras,Rodrigo A. Köhler,Hans Zúñiga,Gustavo E.
author_facet	Pizarro,Marisol Contreras,Rodrigo A. Köhler,Hans Zúñiga,Gustavo E.
author_sort	Pizarro,Marisol
title	Desiccation tolerance in the Antarctic moss Sanionia uncinata
title_short	Desiccation tolerance in the Antarctic moss Sanionia uncinata
title_full	Desiccation tolerance in the Antarctic moss Sanionia uncinata
title_fullStr	Desiccation tolerance in the Antarctic moss Sanionia uncinata
title_full_unstemmed	Desiccation tolerance in the Antarctic moss Sanionia uncinata
title_sort	desiccation tolerance in the antarctic moss sanionia uncinata
publisher	Sociedad de Biología de Chile
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602019000100243
work_keys_str_mv	AT pizarromarisol desiccationtoleranceintheantarcticmosssanioniauncinata AT contrerasrodrigoa desiccationtoleranceintheantarcticmosssanioniauncinata AT kohlerhans desiccationtoleranceintheantarcticmosssanioniauncinata AT zunigagustavoe desiccationtoleranceintheantarcticmosssanioniauncinata
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Desiccation tolerance in the Antarctic moss Sanionia uncinata

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