Listar por autor UPNA "Morán Juez, José Fernando"
Mostrando ítems 1-20 de 22
-
Both free indole-3-acetic acid and photosynthetic performance are important players in the response of Medicago truncatula to urea and ammonium nutrition under axenic conditions
We aimed to identify the early stress response and plant performance of Medicago truncatula growing in axenic medium with ammonium or urea as the sole source of nitrogen, with respect to nitrate-based nutrition. Biomass ... -
Can ammonium stress be positive for plant performance?
In this article, we propose a change of paradigm where ammonium nutrition may be considered not exclusively as an undesirable situation for plant performance, but as a way to provoke changes in plant metabolism that can ... -
Comparison of four functionalization methods of gold nanoparticles for enhancing the enzyme-linked immunosorbent assay (ELISA)
The enzyme-linked immunosorbent assay (ELISA) technique is based on the specific recognition ability of the molecular structure of an antigen (epitope) by an antibody and is likely the most important diagnostic technique ... -
Depletion of the heaviest stable N isotope is associated with NH4+/NH3 toxicity in NH4+-fed plants
Background: In plants, nitrate (NO3-) nutrition gives rise to a natural N isotopic signature (δ15N), which correlates with the δ15N of the N source. However, little is known about the relationship between the δ15N of the ... -
Drought tolerance response of high-yielding soybean varieties to mild drought: physiological and photochemical adjustments
Soybean is a crop of agronomic importance that requires adequate watering during its growth to achieve high production. In this study, we determined physiological, photochemical and metabolic differences in five soybean ... -
Established and proposed roles of xanthine oxidoreductase in oxidative and reductive pathways in plants
Xanthine oxidoreductase (XOR) is among the most-intensively studied enzymes known to participate in the consumption of oxygen in cells. However, it attracted the attention of researchers due its participation in free radical ... -
Evaluation of the anti-nitrative effect of plant antioxidants using a cowpea Fe-superoxide dismutase as a target
Nitric oxide cytotoxicity arises from its rapid conversion to peroxynitrite (ONOO) in the presence of superoxide, provoking functional changes in proteins by nitration of tyrosine residues. The physiological significance ... -
Fabricación y caracterización de nanobiohíbridos: optimización de la interfaz entre nanoestructuras de oro y proteínas para posibles aplicaciones biosensoras
En las últimas décadas, la investigación en el campo de los nanomateriales se ha desarrollado considerablemente, debido a las potenciales aplicaciones de estos materiales en muy diversos campos de la ciencia. En muchas de ... -
IAOx induces the SUR phenotype and differential signalling from IAA under different types of nitrogen nutrition in Medicago truncatula roots
Indole-3-acetaldoxime (IAOx) is a particularly relevant molecule as an intermediate in the pathway for tryptophan-dependent auxin biosynthesis. The role of IAOx in growth-signalling and root phenotype is poorly studied in ... -
The importance of the urea cycle and its relationships to polyamine metabolism during ammonium stress in Medicago truncatula
The ornithine–urea cycle (urea cycle) makes a signifcant contribution to the metabolic responses of lower photosynthetic eukaryotes to episodes of high nitrogen availability. In this study, we compared the role of the plant ... -
Indole-3-acetaldoxime delays root iron-deficiency responses and modify auxin homeostasis in medicago truncatula
Iron (Fe) is an essential plant micronutrient, being a major limiting growth factor in calcareous soils. To increase Fe uptake, plants induce lateral roots growth, the expression of a Fe(III)-chelate reductase (FCR), a ... -
An integrated view of changing nutrient availability in model species: the role of signaling in the plant response
Las plantas tienen que hacer frente a situaciones cambiantes en cuanto a la disponibilidad de nutrientes, por ese motivo en la presente tesis se ha estudiado la respuesta de (i) Arabidopsis thaliana frente a la deficiencia ... -
Mechanisms of ammonium toxicity and the quest for tolerance
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 ... -
A new oxidative pathway of nitric oxide production from oximes in plants
(Cell Press, 2024) Artículo / ArtikuluaNitric oxide (NO) is an essential reactive oxygen species and a signal molecule in plants. Although several studies have proposed the occurrence of oxidative NO production, only reductive routes for NO production, such ... -
Nitric oxide induces the alternative oxidase pathway in Arabidopsis seedlings deprived of inorganic phosphate
Phosphate starvation compromises electron flow through the cytochrome pathway of the mitochondrial electron transport chain, and plants commonly respond to phosphate deprivation by increasing flow through the alternative ... -
Oximes and nitric oxide signalling in Medicago truncatula root system architecture
(2020) Tesis doctoral / Doktoretza tesiaEl óxido nítrico (NO) es una molécula señalizadora ampliamente conocida en el mundo vegetal, relacionada con cada etapa en el desarrollo de la planta. De entre todas sus funciones descritas, se sabe que actúa sinérgicamente ... -
The proteome of Medicago truncatula in response to ammonium and urea nutrition reveals the role of membrane proteins and enzymes of root lignification
Plants differ widely in their growth and tolerance responses to ammonium and urea nutrition, while derived phenotypes seem markedly different from plants grown under nitrate supply. Plant responses to N sources are complex, ... -
Rice (Oryza) hemoglobins [version 2; peer review: 2 approved]
Hemoglobins (Hbs) corresponding to non-symbiotic (nsHb) and truncated (tHb) Hbs have been identified in rice (Oryza). This review discusses the major findings from the current studies on rice Hbs. At the molecular level, ... -
Soybean dihydrolipoamide dehydrogenase (ferric leghemoglobin reductase 2) interacts with and reduces ferric rice non-symbiotic hemoglobin 1
Ferrous oxygenated hemoglobins (Hb2+O2) autoxidize to ferric Hb3+, but Hb3+ is reduced to Hb2+ by enzymatic and non-enzymatic mechanisms. We characterized the interaction between the soybean ferric leghemoglobin reductase ... -
A study of the interface of gold nanoparticles conjugated to cowpea fe-superoxide dismutase
The iron superoxide dismutase (FeSOD) is a first barrier to defend photosynthetic organisms from superoxide radicals. Although it is broadly present in plants and bacteria, FeSODs are absent in animals. They belong to the ...