Diverse salinity responses in Crithmum maritimum tissues at different salinities over time

Crithmum maritimum (sea fennel) withstands high salinity, and to better understand how different protective mechanisms against salinity are activated, young seedlings were exposed to increasing concentrations of NaCl (0 to 512 mM) over six weeks. Plant survival and chlorophyll content were reduced a...

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Autores principales:	Hamdani,Faiza, Derridj,Arezki, Roger,Hilary J
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2017
Materias:	halophyte Na+/K+ reactive oxygen species salt stress
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300013
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spelling	oai:scielo:S0718-951620170003000132017-10-13Diverse salinity responses in Crithmum maritimum tissues at different salinities over timeHamdani,FaizaDerridj,ArezkiRoger,Hilary J halophyte Na+/K+ reactive oxygen species salt stress Crithmum maritimum (sea fennel) withstands high salinity, and to better understand how different protective mechanisms against salinity are activated, young seedlings were exposed to increasing concentrations of NaCl (0 to 512 mM) over six weeks. Plant survival and chlorophyll content were reduced at >85 mM NaCl and growth was affected at > 341 mM NaCl. Relative water content fell and Na+ accumulated more in leaves than in roots. Induction of Na+/H+ antiporter expression reached a maximum at 427 mM NaCl in both tissues. Salinity induced the accumulation of proline, soluble sugars and glycine betaine. All three accumulated to higher levels in leaves than roots and greatest accumulation was after 6 weeks and the highest salt concentrations. Hydrogen peroxide levels fell with increasing salinity in leaves, while ascorbic acid and catalase activity rose. Overall, the most dramatic changes occurred after six weeks of saline stress but different mechanisms were activated at different salinity thresholds and in the two tissues. Key salinity thresholds in the response of Crithmum maritimum to salinity stress are identified activating different mechanisms. At 85 mM NaCl roots reach osmotic adjustment, at 171 mM further osmolyte protection mechanisms are activated, at 256 mM NaCl leaves reach osmotic adjustment, at 341 mM plant growth is affected and at the highest salinity tested, 512 mM, protective mechanisms are affected in leaves but not in roots.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.17 n.3 20172017-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300013en10.4067/S0718-95162017000300013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	halophyte Na+/K+ reactive oxygen species salt stress
spellingShingle	halophyte Na+/K+ reactive oxygen species salt stress Hamdani,Faiza Derridj,Arezki Roger,Hilary J Diverse salinity responses in Crithmum maritimum tissues at different salinities over time
description	Crithmum maritimum (sea fennel) withstands high salinity, and to better understand how different protective mechanisms against salinity are activated, young seedlings were exposed to increasing concentrations of NaCl (0 to 512 mM) over six weeks. Plant survival and chlorophyll content were reduced at >85 mM NaCl and growth was affected at > 341 mM NaCl. Relative water content fell and Na+ accumulated more in leaves than in roots. Induction of Na+/H+ antiporter expression reached a maximum at 427 mM NaCl in both tissues. Salinity induced the accumulation of proline, soluble sugars and glycine betaine. All three accumulated to higher levels in leaves than roots and greatest accumulation was after 6 weeks and the highest salt concentrations. Hydrogen peroxide levels fell with increasing salinity in leaves, while ascorbic acid and catalase activity rose. Overall, the most dramatic changes occurred after six weeks of saline stress but different mechanisms were activated at different salinity thresholds and in the two tissues. Key salinity thresholds in the response of Crithmum maritimum to salinity stress are identified activating different mechanisms. At 85 mM NaCl roots reach osmotic adjustment, at 171 mM further osmolyte protection mechanisms are activated, at 256 mM NaCl leaves reach osmotic adjustment, at 341 mM plant growth is affected and at the highest salinity tested, 512 mM, protective mechanisms are affected in leaves but not in roots.
author	Hamdani,Faiza Derridj,Arezki Roger,Hilary J
author_facet	Hamdani,Faiza Derridj,Arezki Roger,Hilary J
author_sort	Hamdani,Faiza
title	Diverse salinity responses in Crithmum maritimum tissues at different salinities over time
title_short	Diverse salinity responses in Crithmum maritimum tissues at different salinities over time
title_full	Diverse salinity responses in Crithmum maritimum tissues at different salinities over time
title_fullStr	Diverse salinity responses in Crithmum maritimum tissues at different salinities over time
title_full_unstemmed	Diverse salinity responses in Crithmum maritimum tissues at different salinities over time
title_sort	diverse salinity responses in crithmum maritimum tissues at different salinities over time
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162017000300013
work_keys_str_mv	AT hamdanifaiza diversesalinityresponsesincrithmummaritimumtissuesatdifferentsalinitiesovertime AT derridjarezki diversesalinityresponsesincrithmummaritimumtissuesatdifferentsalinitiesovertime AT rogerhilaryj diversesalinityresponsesincrithmummaritimumtissuesatdifferentsalinitiesovertime
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Diverse salinity responses in Crithmum maritimum tissues at different salinities over time

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