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Article ; Online: Molecular characterization of multidrug resistant Enterobacterales strains isolated from liver and kidney transplant recipients in Spain

Marta Fernández-Martínez / Claudia González-Rico / Mónica Gozalo-Margüello / Francesc Marco / Irene Gracia-Ahufinger / Maitane Aranzamendi / Ana M. Sánchez-Díaz / Teresa Vicente-Rangel / Fernando Chaves / Jorge Calvo Montes / Luis Martínez-Martínez / Maria Carmen Fariñas / ENTHERE Study Group, the Group for Study of Infection in Transplantation of the Spanish Society of Infectious Diseases and Clinical Microbiology (GESITRA-SEIMC) and the Spanish Network for Research in Infectious Diseases (REIPI)

Scientific Reports, Vol 11, Iss 1, Pp 1-

2021 Volume 9

Abstract: Abstract The objective of this study was to analyse the mechanisms of resistance to carbapenems and other extended-spectrum-β-lactams and to determine the genetic relatedness of multidrug-resistant Enterobacterales (MDR-E) causing colonization or ... ...

Abstract	Abstract The objective of this study was to analyse the mechanisms of resistance to carbapenems and other extended-spectrum-β-lactams and to determine the genetic relatedness of multidrug-resistant Enterobacterales (MDR-E) causing colonization or infection in solid-organ transplantation (SOT) recipients. Prospective cohort study in kidney (n = 142), liver (n = 98) or kidney/pancreas (n = 7) transplant recipients between 2014 and 2018 in seven Spanish hospitals. We included 531 MDR-E isolates from rectal swabs obtained before transplantation and weekly for 4–6 weeks after the procedure and 10 MDR-E from clinical samples related to an infection. Overall, 46.2% Escherichia coli, 35.3% Klebsiella pneumoniae, 6.5% Enterobacter cloacae, 6.3% Citrobacter freundii and 5.7% other species were isolated. The number of patients with MDR-E colonization post-transplantation (176; 71.3%) was 2.5-fold the number of patients colonized pre-transplantation (71; 28.7%). Extended-spectrum β-lactamases (ESBLs) and carbapenemases were detected in 78.0% and 21.1% of MDR-E isolates respectively. In nine of the 247 (3.6%) transplant patients, the microorganism causing an infection was the same strain previously cultured from surveillance rectal swabs. In our study we have observed a low rate of MDR-E infection in colonized patients 4–6 weeks post-transplantation. E. coli producing bla CTX-M-G1 and K. pneumoniae harbouring bla OXA-48 alone or with bla CTX-M-G1 were the most prevalent MDR-E colonization strains in SOT recipients.
Keywords	Medicine ; R ; Science ; Q
Subject code	610
Language	English
Publishing date	2021-06-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Characterization of the adaptive response of grapevine (cv. Tempranillo) to UV-B radiation under water deficit conditions

Martínez-Lüscher, J / E. Gomès / F. Morales / I. Pascual / J. Aguirreolea / M. Sánchez-Díaz / S. Delrot

Plant science. 2015 Mar., v. 232

2015

Abstract: This work aims to characterize the physiological response of grapevine (Vitis vinifera L.) cv. Tempranillo to UV-B radiation under water deficit conditions. Grapevine fruit-bearing cuttings were exposed to three levels of supplemental biologically ... ...

Abstract	This work aims to characterize the physiological response of grapevine (Vitis vinifera L.) cv. Tempranillo to UV-B radiation under water deficit conditions. Grapevine fruit-bearing cuttings were exposed to three levels of supplemental biologically effective UV-B radiation (0, 5.98 and 9.66kJm−2day−1) and two water regimes (well watered and water deficit), in a factorial design, from fruit-set to maturity under glasshouse-controlled conditions. UV-B induced a transient decrease in net photosynthesis (Anet), actual and maximum potential efficiency of photosystem II, particularly on well watered plants. Methanol extractable UV-B absorbing compounds (MEUVAC) concentration and superoxide dismutase activity increased with UV-B. Water deficit effected decrease in Anet and stomatal conductance, and did not change non-photochemical quenching and the de-epoxidation state of xanthophylls, dark respiration and photorespiration being alternative ways to dissipate the excess of energy. Little interactive effects between UV-B and drought were detected on photosynthesis performance, where the impact of UV-B was overshadowed by the effects of water deficit. Grape berry ripening was strongly delayed when UV-B and water deficit were applied in combination. In summary, deficit irrigation did not modify the adaptive response of grapevine to UV-B, through the accumulation of MEUVAC. However, combined treatments caused additive effects on berry ripening.
Keywords	additive effect ; deficit irrigation ; drought ; energy ; fruit set ; grapes ; methanol ; photorespiration ; photosystem II ; physiological response ; ripening ; stomatal conductance ; superoxide dismutase ; ultraviolet radiation ; Vitis vinifera ; xanthophylls
Language	English
Dates of publication	2015-03
Size	p. 13-22.
Publishing place	Elsevier Ireland Ltd
Document type	Article
ZDB-ID	742010-9
ISSN	1873-2259 ; 0168-9452
ISSN (online)	1873-2259
ISSN	0168-9452
DOI	10.1016/j.plantsci.2014.12.013
Database	NAL-Catalogue (AGRICOLA)

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Article: Climate change conditions (elevated CO2 and temperature) and UV-B radiation affect grapevine (Vitis vinifera cv. Tempranillo) leaf carbon assimilation, altering fruit ripening rates

Martínez-Lüscher, J / E. Gomès / F. Morales / I. Pascual / J. Aguirreolea / M. Sánchez-Díaz / S. Delrot

Plant science. 2015 July, v. 236

2015

Abstract: The increase in grape berry ripening rates associated to climate change is a growing concern for wine makers as it rises the alcohol content of the wine. The present work studied the combined effects of elevated CO2, temperature and UV-B radiation on ... ...

Abstract	The increase in grape berry ripening rates associated to climate change is a growing concern for wine makers as it rises the alcohol content of the wine. The present work studied the combined effects of elevated CO2, temperature and UV-B radiation on leaf physiology and berry ripening rates. Three doses of UV-B: 0, 5.98, 9.66kJm−2d−1, and two CO2–temperature regimes: ambient CO2-24/14°C (day/night) (current situation) and 700ppm CO2-28/18°C (climate change) were imposed to grapevine fruit-bearing cuttings from fruit set to maturity under greenhouse-controlled conditions. Photosynthetic performance was always higher under climate change conditions. High levels of UV-B radiation down regulated carbon fixation rates. A transient recovery took place at veraison, through the accumulation of flavonols and the increase of antioxidant enzyme activities. Interacting effects between UV-B and CO2–temperature regimes were observed for the lipid peroxidation, which suggests that UV-B may contribute to palliate the signs of oxidative damage induced under elevated CO2–temperature. Photosynthetic and ripening rates were correlated. Thereby, the hastening effect of climate change conditions on ripening, associated to higher rates of carbon fixation, was attenuated by UV-B radiation.
Keywords	carbon dioxide ; carbon dioxide enrichment ; carbon dioxide fixation ; climate change ; enzyme activity ; flavonols ; fruit set ; grapes ; leaves ; lipid peroxidation ; photosynthesis ; ripening ; temperature ; ultraviolet radiation ; Vitis vinifera ; wines
Language	English
Dates of publication	2015-07
Size	p. 168-176.
Publishing place	Elsevier Ireland Ltd
Document type	Article
ZDB-ID	742010-9
ISSN	1873-2259 ; 0168-9452
ISSN (online)	1873-2259
ISSN	0168-9452
DOI	10.1016/j.plantsci.2015.04.001
Database	NAL-Catalogue (AGRICOLA)

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Article: Growth, photosynthetic acclimation and yield quality in legumes under climate change simulations: An updated survey

Irigoyen, J.J / F. Morales / I. Pascual / J. Aguirreolea / M. Sánchez-Díaz / M.C. Antolín / N. Goicoechea

Plant science. 2014 Sept., v. 226

2014

Abstract: Continued emissions of CO2, derived from human activities, increase atmospheric CO2 concentration. The CO2 rise stimulates plant growth and affects yield quality. Effects of elevated CO2 on legume quality depend on interactions with N2-fixing bacteria ... ...

Abstract	Continued emissions of CO2, derived from human activities, increase atmospheric CO2 concentration. The CO2 rise stimulates plant growth and affects yield quality. Effects of elevated CO2 on legume quality depend on interactions with N2-fixing bacteria and mycorrhizal fungi. Growth at elevated CO2 increases photosynthesis under short-term exposures in C3 species. Under long-term exposures, however, plants generally acclimate to elevated CO2 decreasing their photosynthetic capacity. An updated survey of the literature indicates that a key factor, perhaps the most important, that characteristically influences this phenomenon, its occurrence and extent, is the plant source–sink balance. In legumes, the ability of exchanging C for N at nodule level with the N2-fixing symbionts creates an extra C sink that avoids the occurrence of photosynthetic acclimation. Arbuscular mycorrhizal fungi colonizing roots may also result in increased C sink, preventing photosynthetic acclimation. Defoliation (Anthyllis vulneraria, simulated grazing) or shoot cutting (alfalfa, usual management as forage) largely increases root/shoot ratio. During re-growth at elevated CO2, new shoots growth and nodule respiration function as strong C sinks that counteracts photosynthetic acclimation. In the presence of some limiting factor, the legumes response to elevated CO2 is weakened showing photosynthetic acclimation. This survey has identified limiting factors that include an insufficient N supply from bacterial strains, nutrient-poor soils, low P supply, excess temperature affecting photosynthesis and/or nodule activity, a genetically determined low nodulation capacity, an inability of species or varieties to increase growth (and therefore C sink) at elevated CO2 and a plant phenological state or season when plant growth is stopped.
Keywords	acclimation ; alfalfa ; Anthyllis vulneraria ; C3 plants ; carbon dioxide ; carbon dioxide enrichment ; carbon sinks ; climate change ; cutting ; defoliation ; emissions ; grazing ; mycorrhizal fungi ; nitrogen fixation ; nitrogen-fixing bacteria ; nodulation ; phenology ; photosynthesis ; plant growth ; range management ; roots ; shoots ; soil ; surveys ; symbionts ; temperature
Language	English
Dates of publication	2014-09
Size	p. 22-29.
Publishing place	Elsevier Ireland Ltd
Document type	Article
ZDB-ID	742010-9
ISSN	1873-2259 ; 0168-9452
ISSN (online)	1873-2259
ISSN	0168-9452
DOI	10.1016/j.plantsci.2014.05.008
Database	NAL-Catalogue (AGRICOLA)

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Article: Short- and long-term physiological responses of grapevine leaves to UV-B radiation

Martínez-Lüscher, J / E. Gomés / F. Morales / I. Pascual / J. Aguirreolea / M. Sánchez-Díaz / S. Delrot

Plant science. 2013 Dec., v. 213

2013

Abstract: The present study aimed at evaluating the short- and long-term effects of UV-B radiation on leaves of grapevine Vitis vinifera (cv. Tempranillo). Grapevine fruit-bearing cuttings were exposed to two doses of supplemental biologically effective UV-B ... ...

Abstract	The present study aimed at evaluating the short- and long-term effects of UV-B radiation on leaves of grapevine Vitis vinifera (cv. Tempranillo). Grapevine fruit-bearing cuttings were exposed to two doses of supplemental biologically effective UV-B radiation (UV-BBE) under glasshouse-controlled conditions: 5.98 and 9.66kJm−2d−1. The treatments were applied either for 20d (from mid-veraison to ripeness) or 75d (from fruit set to ripeness). A 0kJm−2d−1 UV-B treatment was included as control. The main effects of UV-B were observed after the short-term exposure (20d) to 9.66kJm−2d−1. Significant decreases in net photosynthesis, stomatal conductance, sub-stomatal CO2 concentration, the actual photosystem II (PSII) efficiency, total soluble proteins and de-epoxidation state of the VAZ cycle were observed, whereas the activities of several antioxidant enzymes increased significantly. UV-B did not markedly affect dark respiration, photorespiration, the maximum potential PSII efficiency (Fv/Fm), non-photochemical quenching (NPQ), as well as the intrinsic PSII efficiency. However, after 75d of exposure to 5.98and 9.66kJm−2d−1 UV-B most photosynthetic and biochemical variables were unaffected and there were no sign of oxidative damage in leaves. The results suggest a high long-term acclimation capacity of grapevine to high UV-B levels, associated with a high accumulation of UV-B absorbing compounds in leaves, whereas plants seemed to be tolerant to moderate doses of UV-B.
MeSH term(s)	Acclimatization/radiation effects ; Antioxidants/analysis/metabolism ; Carbon Dioxide/metabolism ; Carotenoids/analysis/metabolism ; Cell Respiration/radiation effects ; Chlorophyll/analysis/metabolism ; Lipid Peroxidation/radiation effects ; Oxidation-Reduction/radiation effects ; Photosynthesis/radiation effects ; Photosystem II Protein Complex/radiation effects ; Plant Extracts/analysis/isolation & purification ; Plant Leaves/physiology/radiation effects ; Plant Proteins/analysis/metabolism ; Plant Stomata/physiology/radiation effects ; Plant Transpiration/radiation effects ; Time Factors ; Ultraviolet Rays ; Vitis/physiology/radiation effects
Keywords	carbon dioxide ; enzymes ; fruit set ; leaves ; long term effects ; photorespiration ; photosystem II ; physiological response ; proteins ; stomatal conductance ; ultraviolet radiation ; Vitis vinifera
Language	English
Dates of publication	2013-12
Size	p. 114-122.
Publishing place	Elsevier Ireland Ltd
Document type	Article
ZDB-ID	742010-9
ISSN	1873-2259 ; 0168-9452
ISSN (online)	1873-2259
ISSN	0168-9452
DOI	10.1016/j.plantsci.2013.08.010
Database	NAL-Catalogue (AGRICOLA)

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Article: Methodological advances: Using greenhouses to simulate climate change scenarios

Morales, F / A. Urdiain / I. Pascual / J. Aguirreolea / J.J. Irigoyen / M. Oyarzun / M. Sánchez-Díaz / M.C. Antolín / N. Goicoechea

Plant science. 2014 Sept., v. 226

2014

Abstract: Human activities are increasing atmospheric CO2 concentration and temperature. Related to this global warming, periods of low water availability are also expected to increase. Thus, CO2 concentration, temperature and water availability are three of the ... ...

Abstract	Human activities are increasing atmospheric CO2 concentration and temperature. Related to this global warming, periods of low water availability are also expected to increase. Thus, CO2 concentration, temperature and water availability are three of the main factors related to climate change that potentially may influence crops and ecosystems. In this report, we describe the use of growth chamber – greenhouses (GCG) and temperature gradient greenhouses (TGG) to simulate climate change scenarios and to investigate possible plant responses. In the GCG, CO2 concentration, temperature and water availability are set to act simultaneously, enabling comparison of a current situation with a future one. Other characteristics of the GCG are a relative large space of work, fine control of the relative humidity, plant fertirrigation and the possibility of light supplementation, within the photosynthetic active radiation (PAR) region and/or with ultraviolet-B (UV-B) light. In the TGG, the three above-mentioned factors can act independently or in interaction, enabling more mechanistic studies aimed to elucidate the limiting factor(s) responsible for a given plant response. Examples of experiments, including some aimed to study photosynthetic acclimation, a phenomenon that leads to decreased photosynthetic capacity under long-term exposures to elevated CO2, using GCG and TGG are reported.
Keywords	acclimation ; carbon dioxide ; carbon dioxide enrichment ; crops ; ecosystems ; fertigation ; global warming ; greenhouses ; growth chambers ; humans ; photosynthesis ; photosynthetically active radiation ; plant response ; relative humidity ; ultraviolet radiation ; water temperature
Language	English
Dates of publication	2014-09
Size	p. 30-40.
Publishing place	Elsevier Ireland Ltd
Document type	Article
ZDB-ID	742010-9
ISSN	1873-2259 ; 0168-9452
ISSN (online)	1873-2259
ISSN	0168-9452
DOI	10.1016/j.plantsci.2014.03.018
Database	NAL-Catalogue (AGRICOLA)

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Article: Ultraviolet-B radiation modifies the quantitative and qualitative profile of flavonoids and amino acids in grape berries

Martínez-Lüscher, J / E. Gomès / G. Hilbert / I. Pascual / J. Aguirreolea / M. Sánchez-Díaz / N. Torres / S. Delrot / T. Richard

Phytochemistry. 2014 June, v. 102

2014

Abstract: Grapevine cv. Tempranillo fruit-bearing cuttings were exposed to supplemental ultraviolet-B (UV-B) radiation under controlled conditions, in order to study its effect on grape traits, ripening, amino acids and flavonoid profile. The plants were exposed ... ...

Abstract	Grapevine cv. Tempranillo fruit-bearing cuttings were exposed to supplemental ultraviolet-B (UV-B) radiation under controlled conditions, in order to study its effect on grape traits, ripening, amino acids and flavonoid profile. The plants were exposed to two doses of UV-B biologically effective (5.98 and 9.66kJm−2d−1), applied either from fruit set to ripeness or from the onset of veraison to ripeness. A 0kJm−2d−1 treatment was included as a control. UV-B did not significantly modify grape berry size, but increased the relative mass of berry skin. Time to reach ripeness was not affected by UV-B, which may explain the lack of changes in technological maturity. The concentration of must extractable anthocyanins, colour density and skin flavonols were enhanced by UV-B, especially in plants exposed from fruit set. The quantitative and qualitative profile of grape skin flavonols were modified by UV-B radiation. Monosubstituted flavonols relative abundance increased proportionally to the accumulated UV-B doses. Furthermore, trisubstituted forms, which where predominant in non-exposed berries, were less abundant as UV-B exposure increased. Although total free amino acid content remained unaffected by the treatments, the increased levels of gamma-aminobutyric acid (GABA), as well as the decrease in threonine, isoleucine, methionine, serine and glycine, revealed a potential influence of UV-B on the GABA-mediated signalling and amino acid metabolism. UV-B had an overall positive impact on grape berry composition.
Keywords	amino acid metabolism ; anthocyanins ; color ; flavonols ; free amino acids ; fruit set ; gamma-aminobutyric acid ; grapes ; isoleucine ; methionine ; ripening ; serine ; small fruits ; technological change ; threonine ; ultraviolet radiation ; Vitis
Language	English
Dates of publication	2014-06
Size	p. 106-114.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	208884-8
ISSN	1873-3700 ; 0031-9422
ISSN (online)	1873-3700
ISSN	0031-9422
DOI	10.1016/j.phytochem.2014.03.014
Database	NAL-Catalogue (AGRICOLA)

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