Plant water stress: Associations between ethylene and abscisic acid response

Agriculture is severely impacted by water stress due either to excess (hypoxia/anoxia) or deficit of water availability. Hypoxia/anoxia is associated with oxygen (O2) deficiency or depletion, inducing several anatomical, morphological, physiological, and molecular changes. The majority of these alte...

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Autores principales:	Salazar,Carolina, Hernández,Cristián, Pino,María Teresa
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2015
Materias:	ABA biosynthesis anoxia drought stress ethylene hypoxia
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000300008
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spelling	oai:scielo:S0718-583920150003000082018-10-01Plant water stress: Associations between ethylene and abscisic acid responseSalazar,CarolinaHernández,CristiánPino,María Teresa ABA biosynthesis anoxia drought stress ethylene hypoxia Agriculture is severely impacted by water stress due either to excess (hypoxia/anoxia) or deficit of water availability. Hypoxia/anoxia is associated with oxygen (O2) deficiency or depletion, inducing several anatomical, morphological, physiological, and molecular changes. The majority of these alterations are adaptive mechanisms to cope with low O2 availability; among them, alterations in shoot length, aerenchyma formation and adventitious roots have been described in several studies. The aim of this review was to address the association between abscisic acid (ABA) and ethylene in function of water availability in plants. The major physiological responses to low O2 are associated with changes in root respiration, stomatal conductance, photosynthesis, and fermentation pathways in roots. In addition, several changes in gene expression have been associated with pathways that are not present under normal O2 supply. The expression of ethylene receptor genes is up-regulated by low O2, and ethylene seems to have a crucial role in anatomical and physiological effects during hypoxia/anoxia. During O2 depletion, ethylene accumulation down-regulates ABA by inhibiting rate-limiting enzymes in ABA biosynthesis and by activating ABA breakdown to phaseic acid. With regard to water deficit, drought is primarily sensed by the roots, inducing a signal cascade to the shoots via xylem causing physiological and morphological changes. Several genes are regulated up or down with osmotic stress; the majority of these responsive genes can be driven by either an ABA-dependent or ABA-independent pathway. Some studies suggest that ethylene shuts down leaf growth very fast after the plant senses limited water availability. Ethylene accumulation can antagonize the control of gas exchange and leaf growth upon drought and ABA accumulation.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.75 suppl.1 20152015-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000300008en10.4067/S0718-58392015000300008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	ABA biosynthesis anoxia drought stress ethylene hypoxia
spellingShingle	ABA biosynthesis anoxia drought stress ethylene hypoxia Salazar,Carolina Hernández,Cristián Pino,María Teresa Plant water stress: Associations between ethylene and abscisic acid response
description	Agriculture is severely impacted by water stress due either to excess (hypoxia/anoxia) or deficit of water availability. Hypoxia/anoxia is associated with oxygen (O2) deficiency or depletion, inducing several anatomical, morphological, physiological, and molecular changes. The majority of these alterations are adaptive mechanisms to cope with low O2 availability; among them, alterations in shoot length, aerenchyma formation and adventitious roots have been described in several studies. The aim of this review was to address the association between abscisic acid (ABA) and ethylene in function of water availability in plants. The major physiological responses to low O2 are associated with changes in root respiration, stomatal conductance, photosynthesis, and fermentation pathways in roots. In addition, several changes in gene expression have been associated with pathways that are not present under normal O2 supply. The expression of ethylene receptor genes is up-regulated by low O2, and ethylene seems to have a crucial role in anatomical and physiological effects during hypoxia/anoxia. During O2 depletion, ethylene accumulation down-regulates ABA by inhibiting rate-limiting enzymes in ABA biosynthesis and by activating ABA breakdown to phaseic acid. With regard to water deficit, drought is primarily sensed by the roots, inducing a signal cascade to the shoots via xylem causing physiological and morphological changes. Several genes are regulated up or down with osmotic stress; the majority of these responsive genes can be driven by either an ABA-dependent or ABA-independent pathway. Some studies suggest that ethylene shuts down leaf growth very fast after the plant senses limited water availability. Ethylene accumulation can antagonize the control of gas exchange and leaf growth upon drought and ABA accumulation.
author	Salazar,Carolina Hernández,Cristián Pino,María Teresa
author_facet	Salazar,Carolina Hernández,Cristián Pino,María Teresa
author_sort	Salazar,Carolina
title	Plant water stress: Associations between ethylene and abscisic acid response
title_short	Plant water stress: Associations between ethylene and abscisic acid response
title_full	Plant water stress: Associations between ethylene and abscisic acid response
title_fullStr	Plant water stress: Associations between ethylene and abscisic acid response
title_full_unstemmed	Plant water stress: Associations between ethylene and abscisic acid response
title_sort	plant water stress: associations between ethylene and abscisic acid response
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000300008
work_keys_str_mv	AT salazarcarolina plantwaterstressassociationsbetweenethyleneandabscisicacidresponse AT hernandezcristian plantwaterstressassociationsbetweenethyleneandabscisicacidresponse AT pinomariateresa plantwaterstressassociationsbetweenethyleneandabscisicacidresponse
_version_	1714205349307744256

Plant water stress: Associations between ethylene and abscisic acid response

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