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Carrasco-Barea L, Llorens L, Romaní AM, Gispert M, Verdaguer D. Litter decomposition of three halophytes in a Mediterranean salt marsh: Relevance of litter quality, microbial activity and microhabitat. Sci Total Environ 2022; 838:155743. [PMID: 35526631 DOI: 10.1016/j.scitotenv.2022.155743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/11/2022] [Accepted: 05/02/2022] [Indexed: 06/14/2023]
Abstract
Studies of litter decomposition in salt marshes have been mainly focused on the measurement of decomposition rates, being litter quality, the type of microbial decomposers and their extracellular enzyme activity, rarely considered. Moreover, most of these studies have been conducted in Poaceae and Cyperaceae species, being scarce the literature on Chenopodiaceae species, which are abundant in Mediterranean salt marshes. Here we analyse the litter decomposition process of two Chenopodiaceae (Sarcocornia fruticosa and Halimione portulacoides) and one Poaceae (Elytrigia atherica) species, belonging S. fruticosa to a halophilous scrub habitat and the other two to a salt meadow habitat of a Mediterranean salt marsh. For each species, we analysed litter decomposition rates, litter quality, fungal and bacterial biomass and potential extracellular enzymes activities. In order to embrace the spatial heterogeneity, two zones were considered within each habitat. Litter of E. atherica decomposed 7- and 13-fold slower than those of S. fruticosa and H. portulacoides, respectively, suggesting that this species is the one that would favour most the carbon sequestration into the soil. The different decomposition rates would be explained by the higher initial lignin and cellulose content of E. atherica rather than by the initial carbon and nitrogen content and C/N ratio. Moreover, enzyme efficiency, compared to enzyme activity, better contributes to explain the different decomposition rates observed. Bacteria dominated throughout the litter decomposition process regardless the species, but fungi increased their relevance in the later stages, when the relative lignin litter content increased. Litter decomposition was affected by microhabitat spatial differences, although the responses depended on the species. Hence, flooding (in the habitat of S. fruticosa) or soil texture (in the habitat of E. atherica and H. portulacoides) might have modulated the decomposition process, being H. portulacoides the most sensitive species to the spatial differences of the salt meadow habitat.
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Affiliation(s)
- Lorena Carrasco-Barea
- Group of Soil and Vegetation in the Mediterranean (SOLIPLANT), Plant Physiology Unit, Department of Environmental Sciences, University of Girona, Campus Montilivi, 17003 Girona, Spain.
| | - Laura Llorens
- Group of Soil and Vegetation in the Mediterranean (SOLIPLANT), Plant Physiology Unit, Department of Environmental Sciences, University of Girona, Campus Montilivi, 17003 Girona, Spain
| | - Anna M Romaní
- Group of Continental Aquatic Ecology Research (GRECO), Institute of Aquatic Ecology, University of Girona, Campus Montilivi, 17003 Girona, Spain
| | - Maria Gispert
- Group of Soil and Vegetation in the Mediterranean (SOLIPLANT), Soil Science Unit, Department of Chemical Engineering, Agriculture, and Food Technology, University of Girona, Campus Montilivi, 17003 Girona, Spain
| | - Dolors Verdaguer
- Group of Soil and Vegetation in the Mediterranean (SOLIPLANT), Plant Physiology Unit, Department of Environmental Sciences, University of Girona, Campus Montilivi, 17003 Girona, Spain
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Gispert M, Kuliush T, Dyachenko L, Kharytonov M, Emran M, Verdaguer D, Llorens L, Carrasco-Barea L. Appraising soil carbon storage potential under perennial and annual Chenopodiaceae in salt marsh of NE Spain. Estuarine, Coastal and Shelf Science 2021; 252:107240. [DOI: 10.1016/j.ecss.2021.107240] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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3
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Torrent L, Iglesias M, Marguí E, Hidalgo M, Verdaguer D, Llorens L, Kodre A, Kavčič A, Vogel-Mikuš K. Uptake, translocation and ligand of silver in Lactuca sativa exposed to silver nanoparticles of different size, coatings and concentration. J Hazard Mater 2020; 384:121201. [PMID: 31586917 DOI: 10.1016/j.jhazmat.2019.121201] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/04/2019] [Accepted: 09/09/2019] [Indexed: 05/21/2023]
Abstract
The broad use of silver nanoparticles (AgNPs) in daily life products enhances their possibilities to reach the environment. Therefore, it is important to understand the uptake, translocation and biotransformation in plants and the toxicological impacts derived from these biological processes. In this work, Lactuca sativa (lettuce) was exposed during 9 days to different coated (citrate, polyvinylpyrrolidone, polyethylene glycol) and sized (60, 75, 100 nm) AgNPs at different concentrations (1, 3, 5, 7, 10, 15 mg L-1). Total silver measurements in lettuce roots indicated that accumulation of AgNPs is influenced by size and concentration, but not by nanoparticle coating. On the other hand, nanosilver translocation to shoots was more pronounced for neutral charged and large sized NPs at higher NP concentrations. Single particle inductively coupled plasma mass spectrometry analysis, after an enzymatic digestion of lettuce tissues indicated the dissolution of some NPs. Ag K-edge X-ray absorption spectroscopy analysis corroborated the AgNPs dissolution due to the presence of less Ag-Ag bonds and appearance of Ag-O and/or Ag-S bonds in lettuce roots. Toxicological effects on lettuces were observed after exposure to nanosilver, especially for transpiration and stomatal conductance. These findings indicated that AgNPs can enter to edible plants, exerting toxicological effects on them.
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Affiliation(s)
- Laura Torrent
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Mònica Iglesias
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain.
| | - Eva Marguí
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Manuela Hidalgo
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Dolors Verdaguer
- Department of Environmental Sciences, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Laura Llorens
- Department of Environmental Sciences, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Alojz Kodre
- University of Ljubljana, Faculty for Mathematics and Physics, Jadranska 19, SI-1000 Ljubljana, Slovenia; Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Anja Kavčič
- University of Ljubljana, Biotechnical faculty, Department of Biology, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; University of Ljubljana, Biotechnical faculty, Department of Biology, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
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Díaz-Guerra L, Llorens L, Julkunen-Tiitto R, Nogués I, Font J, González JA, Verdaguer D. Leaf biochemical adjustments in two Mediterranean resprouter species facing enhanced UV levels and reduced water availability before and after aerial biomass removal. Plant Physiol Biochem 2019; 137:130-143. [PMID: 30780050 DOI: 10.1016/j.plaphy.2019.01.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/22/2019] [Accepted: 01/29/2019] [Indexed: 06/09/2023]
Abstract
Effects of supplemented UV radiation and diminished water supply on the leaf concentrations of phenols and antioxidants of two Mediterranean resprouter species, Arbutus unedo and Quercus suber, were assessed before and after entire aerial biomass removal. Potted seedlings of both species were grown outdoors for 8 months with enhanced UV-A + UV-B, enhanced UV-A or ambient UV, in combination with two watering conditions (field capacity or watering reduction). After this period, all aerial biomass was removed and new shoots (resprouts) developed for a further 8 months under the two treatments. In general, the investment in leaf phenols was substantially greater in A. unedo than in Q. suber, while Q. suber allocated more resources to non-phenolic antioxidants (ascorbate and glutathione). In response to enhanced UV-B radiation, Q. suber leaves rose their UV-screening capacity mainly via accumulation of kaempferols, accompanied by an increased concentration of rutins, being these effects exacerbated under low-watering conditions. Conversely, A. unedo leaves responded to UV-B radiation reinforcing the antioxidant machinery by increasing the overall amount of flavonols (especially quercetins) in seedlings, and of ascorbate and glutathione, along with catalase activity, in resprouts. Nevertheless, UV effects on the amount/activity of non-phenolic antioxidants of A. unedo resprouts were modulated by water supply. Indeed, the highest concentration of glutathione was found under the combination of enhanced UV-B radiation and reduced watering, suggesting an enlargement of the antioxidant response in A. unedo resprouts. Different biochemical responses to enhanced UV and drier conditions in seedlings and resprouts of these two species might modulate their competitive interactions in the near future.
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Affiliation(s)
- L Díaz-Guerra
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, C/ Maria Aurèlia Capmany i Farnés 69, E-17003, Girona, Spain.
| | - L Llorens
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, C/ Maria Aurèlia Capmany i Farnés 69, E-17003, Girona, Spain
| | - R Julkunen-Tiitto
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, 80101, Joensuu, Finland
| | - I Nogués
- Institute of Agro-Environmental and Forest Biology (IBAF-CNR), National Research Council, Via Salaria km 29, 300-00015, Monterotondo Scalo, Roma, Italy
| | - J Font
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, C/ Maria Aurèlia Capmany i Farnés 69, E-17003, Girona, Spain; Faculty of Sciences and Technology, University of Vic - Central University of Catalonia, E-08500, Vic, Spain
| | - J A González
- Department of Physics, Polytechnic School, University of Girona, Campus Montilivi, C/ Maria Aurèlia Capmany i Farnés 61, E-17003, Girona, Spain
| | - D Verdaguer
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, C/ Maria Aurèlia Capmany i Farnés 69, E-17003, Girona, Spain
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Castagna A, Csepregi K, Neugart S, Zipoli G, Večeřová K, Jakab G, Jug T, Llorens L, Martínez-Abaigar J, Martínez-Lüscher J, Núñez-Olivera E, Ranieri A, Schoedl-Hummel K, Schreiner M, Teszlák P, Tittmann S, Urban O, Verdaguer D, Jansen MAK, Hideg É. Environmental plasticity of Pinot noir grapevine leaves: A trans-European study of morphological and biochemical changes along a 1,500-km latitudinal climatic gradient. Plant Cell Environ 2017; 40:2790-2805. [PMID: 28792065 DOI: 10.1111/pce.13054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 07/30/2017] [Indexed: 05/08/2023]
Abstract
A 2-year study explored metabolic and phenotypic plasticity of sun-acclimated Vitis vinifera cv. Pinot noir leaves collected from 12 locations across a 36.69-49.98°N latitudinal gradient. Leaf morphological and biochemical parameters were analysed in the context of meteorological parameters and the latitudinal gradient. We found that leaf fresh weight and area were negatively correlated with both global and ultraviolet (UV) radiation, cumulated global radiation being a stronger correlator. Cumulative UV radiation (sumUVR) was the strongest correlator with most leaf metabolites and pigments. Leaf UV-absorbing pigments, total antioxidant capacities, and phenolic compounds increased with increasing sumUVR, whereas total carotenoids and xanthophylls decreased. Despite of this reallocation of metabolic resources from carotenoids to phenolics, an increase in xanthophyll-cycle pigments (the sum of the amounts of three xanthophylls: violaxanthin, antheraxanthin, and zeaxanthin) with increasing sumUVR indicates active, dynamic protection for the photosynthetic apparatus. In addition, increased amounts of flavonoids (quercetin glycosides) and constitutive β-carotene and α-tocopherol pools provide antioxidant protection against reactive oxygen species. However, rather than a continuum of plant acclimation responses, principal component analysis indicates clusters of metabolic states across the explored 1,500-km-long latitudinal gradient. This study emphasizes the physiological component of plant responses to latitudinal gradients and reveals the physiological plasticity that may act to complement genetic adaptations.
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Affiliation(s)
- Antonella Castagna
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124, Pisa, Italy
| | - Kristóf Csepregi
- Department of Plant Biology, University of Pécs, Ifjúság u. 6, 7624, Pécs, Hungary
| | - Susanne Neugart
- Leibniz Institute of Vegetable and Ornamental Crops Großbeeren/Erfurt e.V, Theodor-Echtermeyer-Weg 1, 14979, Großbeeren, Germany
| | | | - Kristýna Večeřová
- Global Change Research Institute CAS, v.v.i, Bělidla 4a, 60300, Brno, Czech Republic
| | - Gábor Jakab
- Department of Plant Biology, University of Pécs, Ifjúság u. 6, 7624, Pécs, Hungary
- Research Institute of Viticulture and Oenology, University of Pécs, Pázmány Péter u. 4, 7624, Pécs, Hungary
| | - Tjaša Jug
- Agricultural and Forestry Institute of Nova Gorica, Pri hrastu 18, 5270, Nova Gorica, Slovenia
| | - Laura Llorens
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Av. Montilivi s/n, 17071, Girona, Spain
| | - Javier Martínez-Abaigar
- Facultad de Ciencia y Tecnología, Universidad de La Rioja, Madre de Dios 53, Logroño, La Rioja, 26006, Spain
| | - Johann Martínez-Lüscher
- Department of Viticulture and Enology, University of California Davis Oakville Experiment Station, 1380 Oakville Grade Road, Oakville, CA, 94562, USA
| | - Encarnación Núñez-Olivera
- Facultad de Ciencia y Tecnología, Universidad de La Rioja, Madre de Dios 53, Logroño, La Rioja, 26006, Spain
| | - Annamaria Ranieri
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124, Pisa, Italy
| | - Katharina Schoedl-Hummel
- Department of Crop Sciences, BOKU-University of Natural Resources and Life Sciences, Konrad-Lorenz-Str. 24, 3430, Tulln, Austria
| | - Monika Schreiner
- Leibniz Institute of Vegetable and Ornamental Crops Großbeeren/Erfurt e.V, Theodor-Echtermeyer-Weg 1, 14979, Großbeeren, Germany
| | - Péter Teszlák
- Research Institute of Viticulture and Oenology, University of Pécs, Pázmány Péter u. 4, 7624, Pécs, Hungary
| | - Susanne Tittmann
- Institute for General and Organic Viticulture, Geisenheim University, Von-Lade-Straße 1, 65366, Geisenheim, Germany
| | - Otmar Urban
- Global Change Research Institute CAS, v.v.i, Bělidla 4a, 60300, Brno, Czech Republic
| | - Dolors Verdaguer
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Av. Montilivi s/n, 17071, Girona, Spain
| | - Marcel A K Jansen
- School of Biological, Environmental and Earth Sciences, University College Cork, College Road, T23 TK30, Cork, Ireland
| | - Éva Hideg
- Department of Plant Biology, University of Pécs, Ifjúság u. 6, 7624, Pécs, Hungary
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Verdaguer D, Jansen MAK, Llorens L, Morales LO, Neugart S. UV-A radiation effects on higher plants: Exploring the known unknown. Plant Sci 2017; 255:72-81. [PMID: 28131343 DOI: 10.1016/j.plantsci.2016.11.014] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 11/28/2016] [Accepted: 11/29/2016] [Indexed: 05/02/2023]
Abstract
Ultraviolet-A radiation (UV-A: 315-400nm) is a component of solar radiation that exerts a wide range of physiological responses in plants. Currently, field attenuation experiments are the most reliable source of information on the effects of UV-A. Common plant responses to UV-A include both inhibitory and stimulatory effects on biomass accumulation and morphology. UV-A effects on biomass accumulation can differ from those on root: shoot ratio, and distinct responses are described for different leaf tissues. Inhibitory and enhancing effects of UV-A on photosynthesis are also analysed, as well as activation of photoprotective responses, including UV-absorbing pigments. UV-A-induced leaf flavonoids are highly compound-specific and species-dependent. Many of the effects on growth and development exerted by UV-A are distinct to those triggered by UV-B and vary considerably in terms of the direction the response takes. Such differences may reflect diverse UV-perception mechanisms with multiple photoreceptors operating in the UV-A range and/or variations in the experimental approaches used. This review highlights a role that various photoreceptors (UVR8, phototropins, phytochromes and cryptochromes) may play in plant responses to UV-A when dose, wavelength and other conditions are taken into account.
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Affiliation(s)
- Dolors Verdaguer
- Environmental Sciences Department, Faculty of Sciences, University of Girona, Campus de Montilivi, C/Maria Aurèlia Capmany I Farnés, 69, E-17003 Girona, Spain.
| | - Marcel A K Jansen
- School of Biological, Earth and Environmental Sciences, University College Cork, Distillery Field, North Mall, Cork, Ireland.
| | - Laura Llorens
- Environmental Sciences Department, Faculty of Sciences, University of Girona, Campus de Montilivi, C/Maria Aurèlia Capmany I Farnés, 69, E-17003 Girona, Spain.
| | - Luis O Morales
- Division of Plant Biology, Department of Biosciences, Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland.
| | - Susanne Neugart
- Leibniz-Institute of Vegetable and Ornamental Crops Grossbeeren/Erfurt e.V., Theodor-Echtermeyer-Weg 1, 14979, Grossbeeren, Germany.
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Del-Castillo-Alonso MÁ, Castagna A, Csepregi K, Hideg É, Jakab G, Jansen MAK, Jug T, Llorens L, Mátai A, Martínez-Lüscher J, Monforte L, Neugart S, Olejnickova J, Ranieri A, Schödl-Hummel K, Schreiner M, Soriano G, Teszlák P, Tittmann S, Urban O, Verdaguer D, Zipoli G, Martínez-Abaigar J, Núñez-Olivera E. Environmental Factors Correlated with the Metabolite Profile of Vitis vinifera cv. Pinot Noir Berry Skins along a European Latitudinal Gradient. J Agric Food Chem 2016; 64:8722-8734. [PMID: 27794599 DOI: 10.1021/acs.jafc.6b03272] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Mature berries of Pinot Noir grapevines were sampled across a latitudinal gradient in Europe, from southern Spain to central Germany. Our aim was to study the influence of latitude-dependent environmental factors on the metabolite composition (mainly phenolic compounds) of berry skins. Solar radiation variables were positively correlated with flavonols and flavanonols and, to a lesser extent, with stilbenes and cinnamic acids. The daily means of global and erythematic UV solar radiation over long periods (bud break-veraison, bud break-harvest, and veraison-harvest), and the doses and daily means in shorter development periods (5-10 days before veraison and harvest) were the variables best correlated with the phenolic profile. The ratio between trihydroxylated and monohydroxylated flavonols, which was positively correlated with antioxidant capacity, was the berry skin variable best correlated with those radiation variables. Total flavanols and total anthocyanins did not show any correlation with radiation variables. Air temperature, degree days, rainfall, and aridity indices showed fewer correlations with metabolite contents than radiation. Moreover, the latter correlations were restricted to the period veraison-harvest, where radiation, temperature, and water availability variables were correlated, making it difficult to separate the possible individual effects of each type of variable. The data show that managing environmental factors, in particular global and UV radiation, through cultural practices during specific development periods, can be useful to promote the synthesis of valuable nutraceuticals and metabolites that influence wine quality.
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Affiliation(s)
| | - Antonella Castagna
- Department of Agriculture - Food and Environment, and Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa , via del Borghetto 80, 56124 Pisa, Italy
| | - Kristóf Csepregi
- Institute of Biology, University of Pécs , Ifjúság u. 6, 7624 Pécs, Hungary
| | - Éva Hideg
- Institute of Biology, University of Pécs , Ifjúság u. 6, 7624 Pécs, Hungary
| | - Gabor Jakab
- Institute of Biology, University of Pécs , Ifjúság u. 6, 7624 Pécs, Hungary
- Research Institute for Viticulture and Oenology, University of Pécs , Pázmány P. u. 4, 7634 Pécs, Hungary
| | - Marcel A K Jansen
- School of Biological, Environmental and Earth Sciences, University College Cork , College Road, Cork, Ireland
| | - Tjaša Jug
- Agricultural and Forestry Institute of Nova Gorica , Pri hrastu 18, 5270 Nova Gorica, Slovenia
| | - Laura Llorens
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi , Maria Aurèlia Capmany i Farnés 69, 17003 Girona, Spain
| | - Anikó Mátai
- Institute of Biology, University of Pécs , Ifjúság u. 6, 7624 Pécs, Hungary
| | - Johann Martínez-Lüscher
- UMR 1287 EGFV, Bordeaux Sciences Agro, INRA, Université de Bordeaux, ISVV , 33882 Villenave d'Ornon, France
| | - Laura Monforte
- Faculty of Science and Technology, University of La Rioja , Madre de Dios 53, 26006 Logroño (La Rioja), Spain
| | - Susanne Neugart
- Department Plant Quality, Leibniz-Institute of Vegetable and Ornamental Crops Grossbeeren/Erfurt e.V. , Theodor-Echtermeyer-Weg 1, 14979 Grossbeeren, Germany
| | - Julie Olejnickova
- Global Change Research Institute CAS , v.v.i, Bělidla 986/4a, 60300 Brno, Czech Republic
| | - Annamaria Ranieri
- Department of Agriculture - Food and Environment, and Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa , via del Borghetto 80, 56124 Pisa, Italy
| | - Katharina Schödl-Hummel
- Department of Crop Sciences, BOKU - University of Natural Resources and Life Sciences , Konrad-Lorenz-Strasse 24, 3430 Tulln, Austria
| | - Monika Schreiner
- Department Plant Quality, Leibniz-Institute of Vegetable and Ornamental Crops Grossbeeren/Erfurt e.V. , Theodor-Echtermeyer-Weg 1, 14979 Grossbeeren, Germany
| | - Gonzalo Soriano
- Faculty of Science and Technology, University of La Rioja , Madre de Dios 53, 26006 Logroño (La Rioja), Spain
| | - Péter Teszlák
- Research Institute for Viticulture and Oenology, University of Pécs , Pázmány P. u. 4, 7634 Pécs, Hungary
| | - Susanne Tittmann
- Institute for General and Organic Viticulture, Geisenheim University , Von-Lade-Strasse 1, 65366 Geisenheim, Germany
| | - Otmar Urban
- Global Change Research Institute CAS , v.v.i, Bělidla 986/4a, 60300 Brno, Czech Republic
| | - Dolors Verdaguer
- Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi , Maria Aurèlia Capmany i Farnés 69, 17003 Girona, Spain
| | - Gaetano Zipoli
- Institute of Biometeorology - National Research Council , Via Caproni 8, 50144 Firenze, Italy
| | - Javier Martínez-Abaigar
- Faculty of Science and Technology, University of La Rioja , Madre de Dios 53, 26006 Logroño (La Rioja), Spain
| | - Encarnación Núñez-Olivera
- Faculty of Science and Technology, University of La Rioja , Madre de Dios 53, 26006 Logroño (La Rioja), Spain
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Nenadis N, Llorens L, Koufogianni A, Díaz L, Font J, Gonzalez JA, Verdaguer D. Interactive effects of UV radiation and reduced precipitation on the seasonal leaf phenolic content/composition and the antioxidant activity of naturally growing Arbutus unedo plants. Journal of Photochemistry and Photobiology B: Biology 2015; 153:435-44. [DOI: 10.1016/j.jphotobiol.2015.10.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 10/07/2015] [Accepted: 10/19/2015] [Indexed: 12/12/2022]
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Bernal M, Llorens L, Julkunen-Tiitto R, Badosa J, Verdaguer D. Altitudinal and seasonal changes of phenolic compounds in Buxus sempervirens leaves and cuticles. Plant Physiol Biochem 2013; 70:471-82. [PMID: 23845826 DOI: 10.1016/j.plaphy.2013.06.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 06/17/2013] [Indexed: 05/02/2023]
Abstract
The variation in the leaf content of phenolic compounds has been related to the UV-B changes of the environment in which plants grow. In this context, we aimed to investigate: a) whether the seasonal and altitudinal changes in the content of phenolic compounds of Buxus sempervirens L. leaves and cuticles could be related to the natural fluctuations in UV-B levels and b) the possible use of specific phenolic compounds as biomarkers of ambient UV-B levels. To achieve these goals we sampled, every three months during one year, leaves of B. sempervirens along an altitudinal gradient. At the lowest and the highest altitudes, we also conducted a UV-exclusion experiment to discern whether the observed changes could be attributed to the natural variation in UV-B. Results show that total phenolic content of leaves was lower in June than in the other sampling dates, which suggests a leaf ontogenic rather than a UV-B effect on the leaf content of these compounds. Regarding the elevational gradient, the overall amount of phenolic acids and neolignan of entire leaves increased with altitude while the total amount of flavonoids in leaf cuticles decreased. However, the lack of a significant effect of our UV-exclusion treatment on the content of these compounds suggests that the observed variations along the altitudinal gradient would respond to other factors rather than to UV-B. Concomitantly, we did not find any phenolic compound in leaves or cuticles of B. sempervirens that could be considered as a biomarker of ambient UV-B levels.
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Affiliation(s)
- M Bernal
- Environmental Sciences Department, Faculty of Sciences, University of Girona, C/Mª Aurèlia Capmany 69, 17071 Girona, Spain.
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Bernal M, Llorens L, Badosa J, Verdaguer D. Interactive effects of UV radiation and water availability on seedlings of six woody Mediterranean species. Physiol Plant 2013; 147:234-47. [PMID: 22671961 DOI: 10.1111/j.1399-3054.2012.01660.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 04/30/2012] [Accepted: 05/08/2012] [Indexed: 05/02/2023]
Abstract
To assess the effects of UV radiation and its interaction with water availability on Mediterranean plants, we performed an experiment with seedlings of six Mediterranean species (three mesophytes vs three xerophytes) grown in a glasshouse from May to October under three UV conditions (without UV, with UVA and with UVA+UVB) and two irrigation levels (watered to saturation and low watered). Morphological, physiological and biochemical measures were taken. Exposure to UVA+UVB increased the overall leaf mass per area (LMA) and the leaf carotenoids/chlorophyll a + b ratio of plants in relation to plants grown without UV or with UVA, respectively. In contrast, we did not find a general effect of UV on the leaf content of phenols or UVB-absorbing compounds of the studied species. Regarding plant growth, UV inhibited the above-ground biomass production of well-watered plants of Pistacia lentiscus. Conversely, under low irrigation, UVA tended to abolish the reduction in growth experienced by P. lentiscus plants growing in a UV-free environment, in accordance with UVA-enhanced apparent electron transport rate (ETR) values under drought in this species. UVA also induced an overall increase in root biomass when plants of the studied species were grown under a low water supply. In conclusion, while plant exposition to UVA favored root growth under water shortage, UVB addition only gave rise to photoprotective responses, such as the increase in LMA or in the leaf carotenoids/chlorophyll a + b ratio of plants. Species-specific responses to UV were not related with the xerophytic or mesophytic character of the studied species.
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Affiliation(s)
- Meritxell Bernal
- Environmental Sciences Department, University of Girona, C/M. Aurèlia Capmany 69, E-17071, Girona, Spain.
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Comont D, Martinez Abaigar J, Albert A, Aphalo P, Causton DR, Figueroa FL, Gaberscik A, Llorens L, Hauser MT, Jansen MAK, Kardefelt M, de la Coba Luque P, Neubert S, Núñez-Olivera E, Olsen J, Robson M, Schreiner M, Sommaruga R, Strid A, Torre S, Turunen M, Veljovic-Jovanovic S, Verdaguer D, Vidovic M, Wagner J, Winkler JB, Zipoli G, Gwynn-Jones D. UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study. Physiol Plant 2012; 145:604-18. [PMID: 22304366 DOI: 10.1111/j.1399-3054.2012.01591.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Lolium perenne (cv. AberDart) was grown at 14 locations along a latitudinal gradient across Europe (37-68°N) to study the impact of ultraviolet radiation (UV) and climate on aboveground growth and foliar UV-B absorbing compounds. At each location, plants were grown outdoors for 5 weeks in a replicated UV-B filtration experiment consisting of open, UV-B transparent (cellulose diacetate) and UV-B opaque (polyester) environments. Fourier transform-infrared spectroscopy was used to compare plant metabolite profiles in relation to treatment and location. UV radiation and climatic parameters were determined for each location from online sources and the data were assessed using a combination of anova and multiple regression analyses. Most of the variation in growth between the locations was attributable to the combination of climatic parameters, with minimum temperature identified as an important growth constraint. However, no single environmental parameter could consistently account for the variability in plant growth. Concentrations of foliar UV-B absorbing compounds showed a positive trend with solar UV across the latitudinal gradient; however, this relationship was not consistent in all treatments. The most striking experimental outcome from this study was the effect of presence or absence of filtration frames on UV-absorbing compounds. Overall, the study demonstrates the value of an European approach in studying the impacts of natural UV across a large latitudinal gradient. We have shown the feasibility of coordinated UV filtration at multiple sites but have also highlighted the need for open controls and careful interpretation of plant responses.
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Verdaguer D, Sala A, Vilà M. Effect of environmental factors and bulb mass on the invasive geophyte Oxalis pes-caprae development. Acta Oecologica 2010. [DOI: 10.1016/j.actao.2009.10.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
BACKGROUND AND AIMS Invasion by alien plants may be partially related to disturbance-related increases in nutrient availability and decreases of competition with native species, and to superior competitive ability of the invader. Oxalis pes-caprae is an invasive winter geophyte in the Mediterranean Islands that reproduces vegetatively via bulbs. An investigation was made into the relative responses of O. pes-caprae and the native annual grass Lolium rigidum to nutrient availability and to competition with each other in order to understand patterns of invasion in the field. Because Oxalis accumulates oxalic acid in its leaves, which could ameliorate soil phosphorous availability, field observations were made to determine whether the presence of Oxalis alters soil P availability. METHODS A full-factorial glasshouse experiment was conducted with nutrient availability (high and low) and competition (Lolium alone, Oxalis alone, and Lolium and Oxalis together). Plant performance was assessed by determining (1) above- and below-ground biomass at the time of Oxalis maximum biomass and (2) reproductive output of Oxalis and Lolium at the end of their respective growth cycles. Measurements were also taken for leaf N and P content. Soil samples were taken in the field from paired Oxalis-invaded and non-invaded plots located in Menorca (Balearic Islands) and available P was determined. KEY RESULTS High nutrient availability increased Oxalis and Lolium vegetative biomass and reproductive output to a similar degree. Competition with Lolium had a much stronger negative effect on Oxalis bulb production than reduced nutrients. Lolium was a superior competitor than Oxalis; the latter did not affect Lolium maximum biomass and spike production. Significantly greater soil-P availability in Oxalis-invaded field soils relative to paired non-invaded soils suggest that Oxalis influences soil P cycling. CONCLUSIONS Oxalis is a poor competitor. This is consistent with the preferential distribution of Oxalis in disturbed areas such as ruderal habitats, and might explain its low influence on the cover of native species in invaded sites. The results also suggest that certain disturbances (e.g. autumn ploughing) may greatly enhance Oxalis invasion.
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Affiliation(s)
- Anna Sala
- Division of Biological Sciences, The University of Montana, Missoula, MT 59812, USA.
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Verdaguer D, Ojeda F. Root starch storage and allocation patterns in seeder and resprouter seedlings of two Cape Erica (Ericaceae) species. Am J Bot 2002; 89:1189-96. [PMID: 21665719 DOI: 10.3732/ajb.89.8.1189] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Post-fire sprouting of dormant buds in resprouter plants is facilitated by stored carbohydrate reserves, with starch being the critical reserve. Starch is mainly stored in xylem parenchyma ray tissue of woody underground organs, such as burls, lignotubers, and roots. We carried out a comparative analysis of the pattern of starch storage and the proportion of parenchymatic ray tissue in the upper root or cotyledonary region of seedlings from seeder and resprouter forms within two Cape Erica (Ericaceae) species: E. coccinea L. and E. calycina L., which were raised in the greenhouse under controlled irrigation. We also explored the root-to-shoot allocation patterns of seeder and resprouter seedlings in these two species. Resprouter seedlings of both species showed higher relative amounts of upper-root starch and upper-root storage tissue as well as a higher root-to-shoot allocation than their seeder counterparts. Pronounced swelling of the upper root region suggests ontogenetic development of a lignotuber in the resprouter forms of the two Erica species. The distinct allocation of starch in roots seems to be genetically determined and would account for the apparent differences in the root-to-shoot allocation patterns between both regeneration forms from the early seedling stage.
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Affiliation(s)
- Dolors Verdaguer
- Unitat de Biologia Vegetal, Dept. de Ciències Ambientals, Universitat de Girona, Campus de Montilivi, 17071-Girona, Spain
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Puigderrajols P, Jofré A, Mir G, Pla M, Verdaguer D, Huguet G, Molinas M. Developmentally and stress-induced small heat shock proteins in cork oak somatic embryos. J Exp Bot 2002; 53:1445-1452. [PMID: 12021292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The timing and tissue localization of small heat shock proteins (sHSPs) during cork oak somatic embryo development was investigated under normal growing culture conditions and in response to stress. Western blot analyses using polyclonal antibodies raised against cork oak recombinant HSP17 showed a transient accumulation of class I sHSPs during somatic embryo maturation and germination. Moreover, the amount of protein increased at all stages of embryo development in response to exogenous stress. The developmentally accumulated proteins localized to early differentiating, but not the highly dividing, regions of the root and shoot apical meristems. By contrast, these highly dividing regions were strongly immunostained after heat stress. Findings support the hypothesis of a distinct control for developmentally and stress-induced accumulation of class I sHSPs. The possible role of sHSPs is discussed in relation to their tissue specific localization.
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Affiliation(s)
- Pere Puigderrajols
- Laboratori del Suro, Facultat de Ciències, Universitat de Girona, 17071 Girona, Spain
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Pascual G, Molinas M, Verdaguer D. Comparative anatomical analysis of the cotyledonary region in three Mediterranean Basin Quercus (Fagaceae). Am J Bot 2002; 89:383-392. [PMID: 21665633 DOI: 10.3732/ajb.89.3.383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Anatomical changes at the cotyledonary node from the embryo to the seedling stage in Quercus coccifera, Q. ilex, and Q. humilis were investigated by light and scanning electron microscopy techniques. Mature embryos of Q. humilis possess 2-3 pairs of leaf primordia and a pair of cotyledonary buds, whereas in Q. coccifera and Q. ilex there are two incipient primordia, and cotyledonary buds are not observed until 1 wk after germination. In all three species the cotyledonary buds multiply, forming bud clusters, and a vascular connection is well established within 5-6 wk after germination. As development proceeds, the cotyledonary region becomes woody, but buds, which are exogenous in origin, never become embedded in the periderm. In comparison with Q. suber, another native Mediterranean Basin oak, the cotyledonary node is short and axillary buds are not present below the insertion of cotyledons. In addition, starch accumulation in the cotyledonary region is not observed from histological analysis in the three oaks. Therefore, in Q. coccifera, Q. ilex, and Q. humilis seedlings the cotyledonary node can be considered to be an important regenerative structure enabling them to resprout after the elimination of the shoot above the cotyledons, despite the absence of a lignotuberous structure.
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Affiliation(s)
- Gemma Pascual
- Unitat de Biologia Vegetal, Departament de Ciències Ambientals, Universitat de Girona, Campus de Montilivi s/n 17071 Girona, Spain
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Verdaguer D, Molinas M. Development and ultrastructure of the endodermis in the primary root of cork oak (Quercus suber). ACTA ACUST UNITED AC 1997. [DOI: 10.1139/b97-087] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The endodermis maturation process was studied in the primary root of the cork oak (Quercus suber L.) with emphasis on the chemical nature of the cell wall and on the possible role of tannins. Tannins were found in endodermal and adjacent cortical cells in all maturation stages. We discuss our findings in relation to the previous literature in other woody and herbaceous species. The results of the histochemical tests showed differences in the aliphatic compounds of the suberin between the Casparian strip suberin and the suberin layer deposited in state II cells. Plasmodesmata were present in radial and tangential walls during the entire maturation process. The significance of plasmodesmata and of the suberin deposition pattern is discussed in relation to apoplastic and symplastic transport in roots. Key words: Casparian strip, endodermis, primary root, suberin, Quercus suber L.
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