Mechanisms of ammonium toxicity and the quest for tolerance

Esteban Terradillos, Raquel; Ariz, Idoia; Cruz, Cristina; Morán Juez, José Fernando

Publication:
Mechanisms of ammonium toxicity and the quest for tolerance

dc.contributor.author	Esteban Terradillos, Raquel	es_ES
dc.contributor.author	Ariz, Idoia
dc.contributor.author	Cruz, Cristina	es_ES
dc.contributor.author	Morán Juez, José Fernando
dc.contributor.department	IdAB. Instituto de Agrobiotecnología / Agrobioteknologiako Institutua	es_ES
dc.date.accessioned	2016-07-26T08:21:42Z
dc.date.available	2018-07-01T23:00:11Z
dc.date.issued	2016
dc.description.abstract	Ammonium sensitivity of plants is a worldwide problem, constraining crop production. Prolonged application of ammonium as the sole nitrogen source may result in physiological and morphological disorders that lead to decreased plant growth and toxicity. The main causes of ammonium toxicity/tolerance described until now include high ammonium assimilation by plants and/or low sensitivity to external pH acidification. The various ammonium transport-related components, especially the non-electrogenic influx of NH3 (related to the depletion of 15N) and the electrogenic influx of NH4+, may contribute to ammonium accumulation, and therefore to NH3 toxicity. However, this accumulation may be influenced by increasing K+ concentration in the root medium. Recently, new insights have been provided by “omics” studies, leading to a suggested involvement of GDP mannose-pyrophosphorylase in the response pathways of NH4+ stress. In this review, we highlight the cross-talk signaling between nitrate, auxins and NO, and the importance of the connection of the plants’ urea cycle to metabolism of polyamines. Overall, the tolerance and amelioration of ammonium toxicity are outlined to improve the yield of ammonium-grown plants. This review identifies future directions of research, focusing on the putative importance of aquaporins in ammonium influx, and on genes involved in ammonium sensitivity and tolerance.	eu
dc.description.sponsorship	The authors acknowledge the support of research grants AGL2014-52396-P from the Spanish Ministry of Economy and Competitiveness (MINECO) and PTDC/BIA-BEC/099323/2008 and PTDC/BIA-ECS/122214/2010 from the Portuguese Fundação para a Ciência e Tecnologia (FCT). RE received a JAE-Doc-2011-046 fellow from the Spanish CSIC, co-financed by the European Social Fund.	eu
dc.embargo.lift	2018-07-01
dc.embargo.terms	2018-07-01
dc.format.mimetype	application/pdf	en
dc.identifier.doi	10.1016/j.plantsci.2016.04.008
dc.identifier.issn	0168-9452 (Print)
dc.identifier.issn	1873-2259 (Electronic)
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/21068
dc.language.iso	eng	en
dc.publisher	Elsevier	en
dc.relation.ispartof	Plant Science 248 (2016) 92-101	en
dc.relation.projectID	info:eu-repo/grantAgreement/MINECO//AGL2014-52396-P/ES/	en
dc.relation.publisherversion	https://dx.doi.org/10.1016/j.plantsci.2016.04.008
dc.rights	© 2016 Elsevier Inc. The manuscript version is made available under the CC BY-NC-ND 4.0 license	en
dc.rights.accessRights	Acceso abierto / Sarbide irekia	es
dc.rights.accessRights	info:eu-repo/semantics/openAccess	en
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	Ammonium	en
dc.subject	Counterbalance	en
dc.subject	Gas	en
dc.subject	Sensitivity	en
dc.subject	Tolerance	en
dc.subject	Urea	en
dc.title	Mechanisms of ammonium toxicity and the quest for tolerance	en
dc.type	Artículo / Artikulua	es
dc.type	info:eu-repo/semantics/article	en
dc.type.version	Versión aceptada / Onetsi den bertsioa	es
dc.type.version	info:eu-repo/semantics/acceptedVersion	en
dspace.entity.type	Publication
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