Nitrogen Assimilation in the Highly Salt- and Boron-Tolerant Ecotype Zea mays L. Amylacea
dc.contributor.author | Fuertes Mendizábal, Teresa | |
dc.contributor.author | Bastías, Elizabeth Irica | |
dc.contributor.author | González Murua, María del Carmen Begoña | |
dc.contributor.author | González Moro, María Begoña | |
dc.date.accessioned | 2020-04-17T17:16:13Z | |
dc.date.available | 2020-04-17T17:16:13Z | |
dc.date.issued | 2020-02-04 | |
dc.identifier.citation | Plants 9(3) : (2020) // Aricle ID 322 | es_ES |
dc.identifier.issn | 2223-7747 | |
dc.identifier.uri | http://hdl.handle.net/10810/42771 | |
dc.description.abstract | The Lluta Valley in Northern Chile is an important agricultural area affected by both salinity and boron (B) toxicity. <i>Zea mays</i> L. amylacea, an ecotype arisen because of the seed selection practiced in this valley, shows a high tolerance to salt and B levels. In the present study the interaction between B and salt was studied after 20 days of treatment at low (100 mM) and high salinity (430 mM NaCl), assessing changes in nitrogen metabolites and in the activity of key nitrogen-assimilating enzymes. Under non-saline conditions, the presence of excessive B favored higher nitrate and ammonium mobilization to leaves, increasing nitrate reductase (NR) activity but not glutamine synthetase (GS). Thus, the increment of nitrogen use efficiency by B application would contribute partially to maintain the biomass production in this ecotype. Positive relationships between NR activity, nitrate, and stomatal conductance were observed in leaves. The increment of major amino acids alanine and serine would indicate a photoprotective role of photorespiration under low-salinity conditions, thus the inhibition of nitrogen assimilation pathway (NR and GS activities) occurred only at high salinity. The role of cytosolic GS regarding the proline accumulation is discussed. | es_ES |
dc.description.sponsorship | Research funded by The Basque Government (IT932-1). E.I. Bastías received a pre-doctoral fellowship from the Universidad de Tarapacá (Arica, Chile) and financial support by Convenio Desempeño Regional UTA-1795. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | |
dc.subject | amino acids | es_ES |
dc.subject | glutamine synthetase | es_ES |
dc.subject | nitrate reductase | es_ES |
dc.subject | proline | es_ES |
dc.title | Nitrogen Assimilation in the Highly Salt- and Boron-Tolerant Ecotype Zea mays L. Amylacea | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.date.updated | 2020-03-27T14:54:46Z | |
dc.rights.holder | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). | es_ES |
dc.relation.publisherversion | https://www.mdpi.com/2223-7747/9/3/322 | es_ES |
dc.identifier.doi | 10.3390/plants9030322 | |
dc.departamentoes | Biología vegetal y ecología | |
dc.departamentoeu | Landaren biologia eta ekologia |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's license is described as © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).