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Cera A, Verdugo-Escamilla C, Marín JA, Palacio S. Calcium sulphate biomineralisation: Artefact of sample preparation? Physiol Plant 2023; 175:e14017. [PMID: 37882257 DOI: 10.1111/ppl.14017] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/20/2023] [Accepted: 08/22/2023] [Indexed: 10/27/2023]
Abstract
Calcium biomineralisation is widely documented in plants. However, crystallisation of Ca-sulphate-containing minerals is closely related to water content, and sample processing, such as drying, alters the water balance of plant tissues. We hypothesised that common sample processing practices may favour the formation of crystals, leading to spurious crystallisation not observed in unaltered plant tissues. We selected three species (Ononis tridentata, Helianthemum squamatum and Gypsophila struthium) with reported gypsum biomineralisation. We used x-ray diffractometry on fresh intact or sliced leaves, and on the same leaves processed by subsequent drying, to address whether sample processing alters crystal formation. Ca-sulphate crystals were detected in dry samples of all species but not in fresh intact samples. Ca-sulphate crystallisation occurred in some cut fresh samples, although the accumulation greatly increased after drying. In addition, G. struthium exhibited Ca-oxalate crystals in both fresh and dry treatments, with a tendency for greater accumulation in dry treatments. Our results demonstrate that the Ca-sulphate crystals observed by x-ray diffractometry in these species are artefacts caused by common sample processing practices, such as excessive drying and slicing samples. We encourage future studies on the biomineral potential of plants to avoid the use of procedures that alter the water balance of tissues.
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Affiliation(s)
- Andreu Cera
- Centro de Ecologia Aplicada Prof. Baeta Neves (CEABN-InBIO), Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Jaca, Spain
| | - Cristóbal Verdugo-Escamilla
- Laboratorio de Estudios Cristalográficos, Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, Armilla, Spain
| | - Juan A Marín
- Departamento de Pomologia, Estación Experimental de Aula Dei CSIC, Zaragoza, Spain
| | - Sara Palacio
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Jaca, Spain
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Cera A, Montserrat-Martí G, Palacio S. Nutritional strategy underlying plant specialization to gypsum soils. AoB Plants 2023; 15:plad041. [PMID: 37448861 PMCID: PMC10337853 DOI: 10.1093/aobpla/plad041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 06/26/2023] [Indexed: 07/15/2023]
Abstract
Gypsum soils are amongst the most widespread extreme substrates of the world, occurring in 112 countries. This type of hypercalcic substrate has a suite of extreme physical and chemical properties that make it stressful for plant establishment and growth. Extreme chemical properties include low plant-available nitrogen and phosphorus and high plant-available sulphur and calcium, which impose strong nutritional imbalances on plants. In spite of these edaphic barriers, gypsum soils harbour rich endemic floras that have evolved independently on five continents, with highly specialized species. Plants that only grow on gypsum are considered soil specialists, and they have a foliar elemental composition similar to the elemental availability of gypsum soils, with high calcium, sulphur and magnesium accumulation. However, the physiological and ecological role of the unique foliar elemental composition of gypsum specialists remains poorly understood, and it is unknown whether it provides an ecological advantage over other generalist species on gypsum soils. This article reviews available literature on the impact of gypsum soil features on plant life and the mechanisms underlying plant adaptation to gypsum environments. We conclude with a hypothesis on the potential role of the nutritional strategy underlying plant specialization to gypsum soils: Gypsum specialists primarily use SO42- as a counter anion to tolerate high Ca2+ concentrations in cells and avoid phosphorus depletion, which is one of the most limiting nutrients in gypsum soils.
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Affiliation(s)
| | - Gabriel Montserrat-Martí
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Avenida de Montañana 1005, Zaragoza, 50059, Spain
| | - Sara Palacio
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Avenida Nuestra Señora de la Victoria 16, Jaca, 22700, Spain
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Cera A, Montserrat-Martí G, Luzuriaga AL, Pueyo Y, Palacio S. When disturbances favour species adapted to stressful soils: grazing may benefit soil specialists in gypsum plant communities. PeerJ 2022. [DOI: 10.7717/peerj.14222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background
Herbivory and extreme soils are drivers of plant evolution. Adaptation to extreme soils often implies substrate-specific traits, and resistance to herbivory involves tolerance or avoidance mechanisms. However, little research has been done on the effect of grazing on plant communities rich in edaphic endemics growing on extreme soils. A widespread study case is gypsum drylands, where livestock grazing often prevails. Despite their limiting conditions, gypsum soils host a unique and highly specialised flora, identified as a conservation priority.
Methods
We evaluated the effect of different grazing intensities on the assembly of perennial plant communities growing on gypsum soils. We considered the contribution of species gypsum affinity and key functional traits of species such as traits related to gypsum specialisation (leaf S accumulation) or traits related to plant tolerance to herbivory such as leaf C and N concentrations. The effect of grazing intensity on plant community indices (i.e., richness, diversity, community weighted-means (CWM) and functional diversity (FD) indices for each trait) were modelled using Generalised Linear Mixed Models (GLMM). We analysed the relative contribution of interspecific trait variation and intraspecific trait variation (ITV) in shifts of community index values.
Results
Livestock grazing may benefit gypsum plant specialists during community assembly, as species with high gypsum affinity, and high leaf S contents, were more likely to assemble in the most grazed plots. Grazing also promoted species with traits related to herbivory tolerance, as species with a rapid-growth strategy (high leaf N, low leaf C) were promoted under high grazing conditions. Species that ultimately formed gypsum plant communities had sufficient functional variability among individuals to cope with different grazing intensities, as intraspecific variability was the main component of species assembly for CWM values.
Conclusions
The positive effects of grazing on plant communities in gypsum soils indicate that livestock may be a key tool for the conservation of these edaphic endemics.
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Affiliation(s)
- Andreu Cera
- Departamento Biodiversidad y Restauración/Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Jaca, Huesca, Spain
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Barcelona, Barcelona, Spain
| | - Gabriel Montserrat-Martí
- Departamento de Biodiversidad y Restauración/Instituto Pirenaico de Ecologia, Consejo Superior de Investigaciones Científicas, Zaragoza, Zaragoza, Spain
| | - Arantzazu L. Luzuriaga
- Departamento de Biología y Geología, Física y Química inorgánica, Universidad Rey Juan Carlos, Mostoles, Madrid, Spain
| | - Yolanda Pueyo
- Departamento de Biodiversidad y Restauración/Instituto Pirenaico de Ecologia, Consejo Superior de Investigaciones Científicas, Zaragoza, Zaragoza, Spain
| | - Sara Palacio
- Departamento Biodiversidad y Restauración/Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Jaca, Huesca, Spain
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Palacio S, Cera A, Escudero A, Luzuriaga AL, Sánchez AM, Mota JF, Pérez‐Serrano Serrano M, Merlo ME, Martínez‐Hernández F, Salmerón‐Sánchez E, Mendoza‐Fernández AJ, Pérez‐García FJ, Montserrat‐Martí G, Tejero P. Recent and ancient evolutionary events shaped plant elemental composition of edaphic endemics: a phylogeny-wide analysis of Iberian gypsum plants. New Phytol 2022; 235:2406-2423. [PMID: 35704043 PMCID: PMC9545410 DOI: 10.1111/nph.18309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 05/24/2022] [Indexed: 05/19/2023]
Abstract
The analysis of plant elemental composition and the underlying factors affecting its variation are a current hot topic in ecology. Ecological adaptation to atypical soils may shift plant elemental composition. However, no previous studies have evaluated its relevance against other factors such as phylogeny, climate or individual soil conditions. We evaluated the effect of the phylogeny, environment (climate, soil), and affinity to gypsum soils on the elemental composition of 83 taxa typical of Iberian gypsum ecosystems. We used a new statistical procedure (multiple phylogenetic variance decomposition, MPVD) to decompose total explained variance by different factors across all nodes in the phylogenetic tree of target species (covering 120 million years of Angiosperm evolution). Our results highlight the relevance of phylogeny on the elemental composition of plants both at early (with the development of key preadaptive traits) and recent divergence times (diversification of the Iberian gypsum flora concurrent with Iberian gypsum deposit accumulation). Despite the predominant phylogenetic effect, plant adaptation to gypsum soils had a strong impact on the elemental composition of plants, particularly on sulphur concentrations, while climate and soil effects were smaller. Accordingly, we detected a convergent evolution of gypsum specialists from different lineages on increased sulphur and magnesium foliar concentrations.
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Affiliation(s)
- Sara Palacio
- Instituto Pirenaico de Ecología (IPE‐CSIC)Av. Nuestra Señora de la Victoria 1622700JacaHuescaSpain
| | - Andreu Cera
- Instituto Pirenaico de Ecología (IPE‐CSIC)Av. Nuestra Señora de la Victoria 1622700JacaHuescaSpain
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Secció de Botànica i Micologia, Facultat de BiologiaUniversitat de BarcelonaDiagonal 64308028BarcelonaSpain
| | - Adrián Escudero
- Área de Biodiversidad y Conservación, Departamento de Biología y Geología, Física y Química InorgánicaUniversidad Rey Juan Carlos28933Móstoles, MadridSpain
| | - Arantzazu L. Luzuriaga
- Área de Biodiversidad y Conservación, Departamento de Biología y Geología, Física y Química InorgánicaUniversidad Rey Juan Carlos28933Móstoles, MadridSpain
| | - Ana M. Sánchez
- Área de Biodiversidad y Conservación, Departamento de Biología y Geología, Física y Química InorgánicaUniversidad Rey Juan Carlos28933Móstoles, MadridSpain
| | - Juan Francisco Mota
- Departamento de Biología y Geología, CEI·MAR and CECOUALUniversidad de Almería04120AlmeríaSpain
| | | | - M. Encarnación Merlo
- Departamento de Biología y Geología, CEI·MAR and CECOUALUniversidad de Almería04120AlmeríaSpain
| | | | | | - Antonio Jesús Mendoza‐Fernández
- Departamento de Biología y Geología, CEI·MAR and CECOUALUniversidad de Almería04120AlmeríaSpain
- Departamento de Botánica, Unidad de Conservación VegetalUniversidad de Granada18071GranadaSpain
| | | | | | - Pablo Tejero
- Instituto Pirenaico de Ecología (IPE‐CSIC)Av. Nuestra Señora de la Victoria 1622700JacaHuescaSpain
- Botanika Saila, Sociedad de Ciencias AranzadiZorroagagaina 1120014Donostia‐San SebastianGipuzkoaSpain
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Cera A, Montserrat‐Martí G, Drenovsky RE, Ourry A, Brunel‐Muguet S, Palacio S. Gypsum endemics accumulate excess nutrients in leaves as a potential constitutive strategy to grow in grazed extreme soils. Physiol Plant 2022; 174:e13738. [PMID: 35765177 PMCID: PMC9546198 DOI: 10.1111/ppl.13738] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Extreme soils often have mineral nutrient imbalances compared to plant nutritional requirements and co-occur in open areas where grazers thrive. Thus, plants must respond to both constraints, which can affect nutrient concentrations in all plant organs. Gypsum soil provides an excellent model system to study adaptations to extreme soils under current grazing practices as it harbours two groups of plant species that differ in their tolerance to gypsum soils and foliar composition. However, nutrient concentrations in organs other than leaves, and their individual responses to simulated herbivory, are still unknown in gypsum plants. We studied plant biomass, root mass ratio and nutrient partitioning among different organs (leaves, stems, coarse roots, fine roots) in five gypsum endemics and five generalists cultivated in gypsum and calcareous soils and subjected to different levels of simulated browsing. Gypsum endemics tended to have higher elemental concentration in leaves, stems and coarse roots than generalist species in both soil types, whereas both groups tended to show similar high concentrations in fine roots. This behaviour was especially clear with sulphur (S), which is found in excess in gypsum soils, and which endemics accumulated in leaves as sulphate (>50% of S). Moreover, plants subjected to clipping, regardless of their affinity to gypsum, were unable to compensate for biomass losses and showed similar elemental composition to unclipped plants. The accumulation of excess mineral nutrients by endemic species in aboveground organs may be a constitutive nutritional strategy in extreme soils and is potentially playing an anti-herbivore role in grazed gypsum outcrops.
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Affiliation(s)
- Andreu Cera
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de EcologíaConsejo Superior de Investigaciones CientíficasJacaSpain
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Secció de Botànica i Micologia, Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain
| | - Gabriel Montserrat‐Martí
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de EcologíaConsejo Superior de Investigaciones CientíficasZaragozaSpain
| | | | - Alain Ourry
- Agronomie et Nutritions N, C, S, SFR Normandie Végétal (FED 4277), UNICAEN, INRAE, UMR 950 Ecophysiologie VégétaleNormandie UniversitéCaenFrance
| | - Sophie Brunel‐Muguet
- Agronomie et Nutritions N, C, S, SFR Normandie Végétal (FED 4277), UNICAEN, INRAE, UMR 950 Ecophysiologie VégétaleNormandie UniversitéCaenFrance
| | - Sara Palacio
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de EcologíaConsejo Superior de Investigaciones CientíficasJacaSpain
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Quadri G, Franzè A, Tomassini F, Rolfo C, Meynet I, Celentani D, Gribaudo E, Tizzani E, Cerrato E, Chinaglia A, Lococo M, Palacio S, Minniti D, Varbella F. P67 MAGMARIS FRACTURE AND COLLAPSE DURING PCI: ACUTE TREATMENT AND FOLLOW–UP. Eur Heart J Suppl 2022. [DOI: 10.1093/eurheartj/suac012.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Resorbable Magnesium Scaffold (RMS) Magmaris represents an attractive alternative to permanent metal stenting in young patients undergoing PCI. Despite the promising long–term results, especially in terms of scaffold thrombosis, no data on acute RMS deployment failure and subsequent treatment are available. A 44–year–old gentleman with history of effort angina was admitted to our Department to perform coronary angiography. The exam showed an intermediate stenosis in the mid–tract of Left Anterior Descending (LAD, Figure 1, Panel A1), functionally significant (Instantaneous wave–free ratio 0.85). After Optical Coherence Tomography (OCT) evaluation (Panel A2), a wire was placed in Second Diagonal Branch (DG2) and predilation with a NC 3.5mm balloon on mid–tract of LAD was performed, followed by 3.5x25mm Magmaris implantation. Multiple runs performed after removing the jailed guidewire on Dg2, showed a remarkable angiographic result (Panel B1). However, OCT showed struts fracture near the distal RMS segment resulting in scaffold collapse as confirmed by 3D–reconstruction (Panel B2, B3). Therefore, scaffold dilatation with NC 3.5mm balloon was performed, followed by Magmaris 3.5x20mm intra–scaffold implantation. Panel C1 and C2 showed good angiographic and OCT results after postdilatation with NC 3.5 and 4.0mm balloon in the distal and proximal part, respectively. A planned one–year angiography (Panel D1) revealed a small aneurismatic enlargement in the previous overlapped segment, while no residual struts were visible at OCT. (Panel D2) To our knowledge we reported the first case of Magmaris acute fracture (probably due to a forced removal of the Dg2 jailed guidewire) treated with a second intra–scaffold RMS. The present case should emphasize the importance of intracoronary imaging guidance while more data are needed to clarify the optimal treatment of acute RMS implantation failure.
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Affiliation(s)
- G Quadri
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - A Franzè
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - F Tomassini
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - C Rolfo
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - I Meynet
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - D Celentani
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - E Gribaudo
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - E Tizzani
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - E Cerrato
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - A Chinaglia
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - M Lococo
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - S Palacio
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - D Minniti
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
| | - F Varbella
- S.C. CARDIOLOGIA, OSPEDALE DEGLI INFERMI, RIVOLI; S.C. CARDIOLOGIA, AOU SAN LUIGI GONZAGA, ORBASSANO; DIREZIONE MEDICA, ASL TO3, RIVOLI
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Matinzadeh Z, López‐Angulo J, Escudero A, Palacio S, Abedi M, Akhani H. Functional structure of plant communities along salinity gradients in Iranian salt marshes. Plant Environ Interact 2022; 3:16-27. [PMID: 37283692 PMCID: PMC10168069 DOI: 10.1002/pei3.10070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 01/06/2022] [Accepted: 01/13/2022] [Indexed: 06/08/2023]
Abstract
Salt marshes are unique habitats between sea or saline lakes and land that need to be conserved from the effects of global change. Understanding the variation in functional structure of plant community along environmental gradients is critical to predict the response of plant communities to ongoing environmental changes. We evaluated the changes in the functional structure of halophytic communities along soil gradients including salinity, in Iranian salt marshes; Lake Urmia, Lake Meyghan, Musa estuary, and Nayband Bay (Iran). We established 48 plots from 16 sites in four salt marshes and sampled 10 leaves per species to measure leaf functional traits. Five soil samples were sampled from each plot and 30 variables were analyzed. We examined the changes in the functional structure of plant communities (i.e., functional diversity [FD] and community weighted mean [CWM]) along local soil gradients using linear mixed effect models. Our results showed that FD and CWM of leaf thickness tended to increase with salinity, while those indices related to leaf shape decreased following soil potassium content. Our results suggest that the variations in functional structure of plant communities along local soil gradients reveal the effect of different ecological processes (e.g., niche differentiation related to the habitat heterogeneity) that drive the assembly of halophytic plant communities in SW Asian salt marshes.
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Affiliation(s)
- Zeinab Matinzadeh
- Halophytes and C4 Plants Research Laboratory, Department of Plant SciencesCollege of ScienceSchool of BiologyUniversity of TehranTehranIran
| | - Jesús López‐Angulo
- Departamento de Biología, Geología, Física y Química inorgánicaUniversidad Rey Juan CarlosMadridSpain
- Department of Environmental Systems ScienceSwiss Federal Institute of Technology Zurich (ETH)ZürichSwitzerland
| | - Adrián Escudero
- Departamento de Biología, Geología, Física y Química inorgánicaUniversidad Rey Juan CarlosMadridSpain
| | - Sara Palacio
- Instituto Pirenaico de Ecología (IPE‐CSIC)HuescaSpain
| | - Mehdi Abedi
- Department of Range Management, Faculty of Natural ResourcesTarbiat Modares UniversityNoorIran
| | - Hossein Akhani
- Halophytes and C4 Plants Research Laboratory, Department of Plant SciencesCollege of ScienceSchool of BiologyUniversity of TehranTehranIran
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de la Puente L, Pedro Ferrio J, Palacio S. Disentangling water sources in a gypsum plant community. Gypsum crystallization water is a key source of water for shallow-rooted plants. Ann Bot 2022; 129:87-100. [PMID: 34406365 PMCID: PMC8829898 DOI: 10.1093/aob/mcab107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 08/17/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND AND AIMS Gypsum drylands are widespread worldwide. In these arid ecosystems, the ability of different species to access different water sources during drought is a key determining factor of the composition of plant communities. Gypsum crystallization water could be a relevant source of water for shallow-rooted plants, but the segregation in the use of this source of water among plants remains unexplored. We analysed the principal water sources used by 20 species living in a gypsum hilltop, the effect of rooting depth and gypsum affinity, and the interaction of the plants with the soil beneath them. METHODS We characterized the water stable isotope composition, δ 2H and δ 18O, of plant xylem water and related it to the free and gypsum crystallization water extracted from different depths throughout the soil profile and the groundwater, in both spring and summer. Bayesian isotope mixing models were used to estimate the contribution of water sources to plant xylem sap. KEY RESULTS In spring, all species used free water from the top soil as the main source. In summer, there was segregation in water sources used by different species depending on their rooting depth, but not on their gypsum affinity. Gypsum crystallization water was the main source for most shallow-rooted species, whereas free water from 50 to 100 cm depth was the main source for deep-rooted species. We detected plant-soil interactions in spring, and indirect evidence of possible hydraulic lift by deep-rooted species in summer. CONCLUSIONS Plants coexisting in gypsum communities segregate their hydrological niches according to their rooting depth. Crystallization water of gypsum represents an unaccounted for, vital source for most of the shallow-rooted species growing on gypsum drylands. Thus, crystallization water helps shallow-rooted species to endure arid conditions, which eventually accounts for the maintenance of high biodiversity in these specialized ecosystems.
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Affiliation(s)
- Laura de la Puente
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Avenida Nuestra Señora de la Victoria, 16, Jaca, ES-22700, Spain
| | - Juan Pedro Ferrio
- Unidad de Recursos Forestales, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Av. Montañana 930, Zaragoza, ES-50059, Spain
| | - Sara Palacio
- Departamento Biodiversidad y Restauración, Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Avenida Nuestra Señora de la Victoria, 16, Jaca, ES-22700, Spain
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9
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Palacio S, Paterson E, Hester AJ, Nogués S, Lino G, Anadon-Rosell A, Maestro M, Millard P. No preferential carbon-allocation to storage over growth in clipped birch and oak saplings. Tree Physiol 2020; 40:621-636. [PMID: 32050021 PMCID: PMC7201831 DOI: 10.1093/treephys/tpaa011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 01/21/2020] [Accepted: 01/23/2020] [Indexed: 06/10/2023]
Abstract
Herbivory is one of the most globally distributed disturbances affecting carbon (C)-cycling in trees, yet our understanding of how it alters tree C-allocation to different functions such as storage, growth or rhizodeposition is still limited. Prioritized C-allocation to storage replenishment vs growth could explain the fast recovery of C-storage pools frequently observed in growth-reduced defoliated trees. We performed continuous 13C-labeling coupled to clipping to quantify the effects of simulated browsing on the growth, leaf morphology and relative allocation of stored vs recently assimilated C to the growth (bulk biomass) and non-structural carbohydrate (NSC) stores (soluble sugars and starch) of the different organs of two tree species: diffuse-porous (Betula pubescens Ehrh.) and ring-porous (Quercus petraea [Matt.] Liebl.). Carbon-transfers from plants to bulk and rhizosphere soil were also evaluated. Clipped birch and oak trees shifted their C-allocation patterns above-ground as a means to recover from defoliation. However, such increased allocation to current-year stems and leaves did not entail reductions in the allocation to the rhizosphere, which remained unchanged between clipped and control trees of both species. Betula pubescens and Q. petraea showed differences in their vulnerability and recovery strategies to clipping, the ring-porous species being less affected in terms of growth and architecture by clipping than the diffuse-porous. These contrasting patterns could be partly explained by differences in their C cycling after clipping. Defoliated oaks showed a faster recovery of their canopy biomass, which was supported by increased allocation of new C, but associated with large decreases in their fine root biomass. Following clipping, both species recovered NSC pools to a larger extent than growth, but the allocation of 13C-labeled photo-assimilates into storage compounds was not increased as compared with controls. Despite their different response to clipping, our results indicate no preventative allocation into storage occurred during the first year after clipping in either of the species.
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Affiliation(s)
- Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Nuestra Señora de la Victoria, 16, Jaca, Huesca 22700, Spain
- James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
| | - Eric Paterson
- James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
| | - Alison J Hester
- James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
| | - Salvador Nogués
- Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 643, Barcelona 08028, Spain
| | - Gladys Lino
- Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 643, Barcelona 08028, Spain
- Facultad de Ciencias Ambientales, Universidad Científica del Sur, Panamericana Sur km 19, Villa El Salvador 15067, Lima, Peru
| | - Alba Anadon-Rosell
- Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 643, Barcelona 08028, Spain
- Institute of Botany and Landscape Ecology, University of Greifswald, Soldmanstraße 15, Greifswald 17487, Germany
| | - Melchor Maestro
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Montañana, 1005, Zaragoza 50059, Spain
| | - Peter Millard
- Manaaki Whenua Landcare Research, PO Box 69040, Lincoln 7640, New Zealand
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10
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Matinzadeh Z, Akhani H, Abedi M, Palacio S. The elemental composition of halophytes correlates with key morphological adaptations and taxonomic groups. Plant Physiol Biochem 2019; 141:259-278. [PMID: 31200272 DOI: 10.1016/j.plaphy.2019.05.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 03/07/2019] [Revised: 05/23/2019] [Accepted: 05/23/2019] [Indexed: 05/11/2023]
Abstract
Halophytes are crucial in the light of increasing soil salinization, yet our understanding of their chemical composition and its relationship to key morphological traits such as succulence or salt excretion is limited. This study targets this issue by exploring the relationship between the elemental composition of 108 plant species from saline environments in Iran and their eco-morphological traits and taxonomy. Leaves and/or photosynthetic shoots of individual species and soils were sampled and analyzed for 20 elements in plant samples and 5 major elements plus % gypsum content, pH, and EC in soil samples. Eu-halophytes and leaf- and stem-succulent and salt-recreting plants showed high concentrations of Na, S, and Mg and low concentrations of Ca and K. In contrast, pseudo-halophytes, facultative-halophytes and eury-hygro-halophytes, which often lack succulent shoots, showed low Na, S, and Mg and high Ca and K concentrations in their leaves. Clear patterns were identified among taxonomic families, with Chenopodiaceae and Plumbaginaceae having high Na and Mg and low Ca and K concentrations, Caryophyllaceae having high K, Poaceae having low Na, and Asteraceae, Boraginaceae, and Brassicaceae showing high foliar Ca concentrations. We conclude that the elemental composition of halophytes and pseudo-halophytes is related to salt-tolerance categories, eco-morphological types and respective taxonomic groups.
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Affiliation(s)
- Zeinab Matinzadeh
- Halophytes and C(4) Plants Research Laboratory, Department of Plant Sciences, School of Biology, College of Science, University of Tehran, P.O.Box, 14155-6455, Tehran, Iran
| | - Hossein Akhani
- Halophytes and C(4) Plants Research Laboratory, Department of Plant Sciences, School of Biology, College of Science, University of Tehran, P.O.Box, 14155-6455, Tehran, Iran.
| | - Mehdi Abedi
- Department of Range Management, Faculty of Natural Resources, Tarbiat Modares University, 46417-76489, Noor, Iran
| | - Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Nuestra Señora de la Victoria, 16, 22700, Jaca, Huesca, Spain
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11
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Steinbauer MJ, Grytnes JA, Jurasinski G, Kulonen A, Lenoir J, Pauli H, Rixen C, Winkler M, Bardy-Durchhalter M, Barni E, Bjorkman AD, Breiner FT, Burg S, Czortek P, Dawes MA, Delimat A, Dullinger S, Erschbamer B, Felde VA, Fernández-Arberas O, Fossheim KF, Gómez-García D, Georges D, Grindrud ET, Haider S, Haugum SV, Henriksen H, Herreros MJ, Jaroszewicz B, Jaroszynska F, Kanka R, Kapfer J, Klanderud K, Kühn I, Lamprecht A, Matteodo M, di Cella UM, Normand S, Odland A, Olsen SL, Palacio S, Petey M, Piscová V, Sedlakova B, Steinbauer K, Stöckli V, Svenning JC, Teppa G, Theurillat JP, Vittoz P, Woodin SJ, Zimmermann NE, Wipf S. Accelerated increase in plant species richness on mountain summits is linked to warming. Nature 2018; 556:231-234. [PMID: 29618821 DOI: 10.1038/s41586-018-0005-6] [Citation(s) in RCA: 248] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 02/20/2018] [Indexed: 11/09/2022]
Abstract
Globally accelerating trends in societal development and human environmental impacts since the mid-twentieth century 1-7 are known as the Great Acceleration and have been discussed as a key indicator of the onset of the Anthropocene epoch 6 . While reports on ecological responses (for example, changes in species range or local extinctions) to the Great Acceleration are multiplying 8, 9 , it is unknown whether such biotic responses are undergoing a similar acceleration over time. This knowledge gap stems from the limited availability of time series data on biodiversity changes across large temporal and geographical extents. Here we use a dataset of repeated plant surveys from 302 mountain summits across Europe, spanning 145 years of observation, to assess the temporal trajectory of mountain biodiversity changes as a globally coherent imprint of the Anthropocene. We find a continent-wide acceleration in the rate of increase in plant species richness, with five times as much species enrichment between 2007 and 2016 as fifty years ago, between 1957 and 1966. This acceleration is strikingly synchronized with accelerated global warming and is not linked to alternative global change drivers. The accelerating increases in species richness on mountain summits across this broad spatial extent demonstrate that acceleration in climate-induced biotic change is occurring even in remote places on Earth, with potentially far-ranging consequences not only for biodiversity, but also for ecosystem functioning and services.
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Affiliation(s)
- Manuel J Steinbauer
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark.
- GeoZentrum Nordbayern, Department of Geography and Geosciences, Friedrich-Alexander University of Erlangen-Nürnberg (FAU), Erlangen, Germany.
| | | | | | - Aino Kulonen
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
| | - Jonathan Lenoir
- CNRS, UMR 7058 EDYSAN, Université de Picardie Jules Verne, Amiens, France
| | - Harald Pauli
- GLORIA Coordination, Institute for Interdisciplinary Mountain Research at the Austrian Academy of Sciences (ÖAW-IGF), Vienna, Austria
- GLORIA Coordination, Center for Global Change and Sustainability at the University of Natural Resources and Life Sciences (BOKU-gW/N), Vienna, Austria
| | - Christian Rixen
- WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
| | - Manuela Winkler
- GLORIA Coordination, Institute for Interdisciplinary Mountain Research at the Austrian Academy of Sciences (ÖAW-IGF), Vienna, Austria
- GLORIA Coordination, Center for Global Change and Sustainability at the University of Natural Resources and Life Sciences (BOKU-gW/N), Vienna, Austria
| | - Manfred Bardy-Durchhalter
- GLORIA Coordination, Institute for Interdisciplinary Mountain Research at the Austrian Academy of Sciences (ÖAW-IGF), Vienna, Austria
- GLORIA Coordination, Center for Global Change and Sustainability at the University of Natural Resources and Life Sciences (BOKU-gW/N), Vienna, Austria
| | - Elena Barni
- Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy
| | - Anne D Bjorkman
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
- School of GeoSciences, University of Edinburgh, Edinburgh, UK
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Frank T Breiner
- Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Sarah Burg
- WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
| | - Patryk Czortek
- Białowiez˙ a Geobotanical Station, Faculty of Biology, University of Warsaw, Białowiez˙ a, Poland
| | - Melissa A Dawes
- WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Anna Delimat
- W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, Poland
| | - Stefan Dullinger
- Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
| | | | - Vivian A Felde
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | | | - Kjetil F Fossheim
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | | | - Damien Georges
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
- International Agency for Research on Cancer, Lyon, France
| | - Erlend T Grindrud
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | - Sylvia Haider
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Siri V Haugum
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - Hanne Henriksen
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | | | - Bogdan Jaroszewicz
- Białowiez˙ a Geobotanical Station, Faculty of Biology, University of Warsaw, Białowiez˙ a, Poland
| | - Francesca Jaroszynska
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Robert Kanka
- Institute of Landscape Ecology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Jutta Kapfer
- Department of Landscape Monitoring, Norwegian Institute of Bioeconomy Research, Tromsø, Norway
| | - Kari Klanderud
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | - Ingolf Kühn
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
- Department for Community Ecology, Helmholtz Centre for Environmental Research - UFZ, Halle, Germany
| | - Andrea Lamprecht
- GLORIA Coordination, Institute for Interdisciplinary Mountain Research at the Austrian Academy of Sciences (ÖAW-IGF), Vienna, Austria
- GLORIA Coordination, Center for Global Change and Sustainability at the University of Natural Resources and Life Sciences (BOKU-gW/N), Vienna, Austria
| | - Magali Matteodo
- WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
- Institute of Earth Surface Dynamics, University of Lausanne, Lausanne, Switzerland
| | | | - Signe Normand
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
- Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Bioscience, Aarhus University, Aarhus, Denmark
| | - Arvid Odland
- Department of Natural Sciences and Environmental Health, University College of Southeast Norway, Bø, Norway
| | - Siri L Olsen
- Norwegian Institute for Nature Research, Oslo, Norway
| | - Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Huesca, Spain
| | - Martina Petey
- Environmental Protection Agency of Aosta Valley, Saint-Christophe, Italy
| | - Veronika Piscová
- Institute of Landscape Ecology, Slovak Academy of Sciences, Bratislava, Slovakia
| | | | - Klaus Steinbauer
- GLORIA Coordination, Institute for Interdisciplinary Mountain Research at the Austrian Academy of Sciences (ÖAW-IGF), Vienna, Austria
- GLORIA Coordination, Center for Global Change and Sustainability at the University of Natural Resources and Life Sciences (BOKU-gW/N), Vienna, Austria
| | - Veronika Stöckli
- WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
- Bergwelten 21 AG, Davos Platz, Switzerland
| | - Jens-Christian Svenning
- Section for Ecoinformatics and Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark
- Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Bioscience, Aarhus University, Aarhus, Denmark
| | - Guido Teppa
- Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy
| | - Jean-Paul Theurillat
- Centre Alpien de Phytogéographie, Fondation J.-M. Aubert, Champex-Lac, Switzerland
- Section of Biology, University of Geneva, Chambésy, Switzerland
| | - Pascal Vittoz
- Institute of Earth Surface Dynamics, University of Lausanne, Lausanne, Switzerland
| | - Sarah J Woodin
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Niklaus E Zimmermann
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
- Department of Environmental Systems Science, Swiss Federal Institute of Technology ETH, Zurich, Switzerland
| | - Sonja Wipf
- WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland.
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Palacio S, Torres A, Prado E, Lopes G. Abstract P4-10-20: Breast cancer in Brazil: HER-2 testing and treatment patterns. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p4-10-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
BACKGROUND
Breast cancer is the most common cancer among Brazilian women. HER-2 targeted therapy improves overall survival in HER-2 overexpressing patients but immunohistochemistry testing for HER2 is not standardized in Brazil and is not available universally. In Brazil the health system includes a public and private sector. The aim of our study was to delineate the patterns of testing of HER-2 over time in Brazil in both of these settings and to determine if any disparities exist in testing and treatments received.
METHODS
Observational, retrospective study involving practice patterns of over 2000 cancer physicians in Brazil. We obtained de-identified data from a commercial database, which included 54,829 patients with breast cancer treated between 2012 and 2016. We analyzed the frequency of HER-2 testing, the percentage of positive results and the most common treatments used in the first line setting in both the private and public sector. The chi-squared test was used for proportions.
RESULTS
HER-2 testing was frequently performed in both the private and public sector (87% vs. 81%, p<0.0001. Between 2012 and 2016 most patients had HER-2 testing (88%, 73%, 79%, 90% and 88%, respectively) but coverage was not universal. The percentage of HER-2 positivity was 25%. The most common first line regimens used were docetaxel/trastuzumab, paclitaxel/trastuzumab and trastuzumab monotherapy. In the private sector trastuzumab/pertuzumab/docetaxel was the most commonly used regimen. In the public sector taxanes were frequently used as monotherapy without HER-2 targeted therapy.
CONCLUSIONS
To our knowledge this is the largest dataset assessing HER-2 testing and treatment patterns in Brazil. The frequency of testing has remained stable over the last 5 years, but is higher in the private sector and this finding was highly statistically significant. There are also differences in the regimens used in the private vs. public sector. Pertuzumab was approved in 2013 in the US and its use has increased in Brazil over the last two years. This trend however was only seen in the private sector. In the public sector there is still significant use of chemotherapy without HER-2 directed therapy despite HER-2 overexpression, which is possibly related to the restricted access of anti-HER2 therapy in the public health system for metastatic patients. Taxanes are used widely in both the public and private sector, which is possibly related to the availability of generics.
HER 2 Testing in the Public Sector20122013201420152016Tested4,2853,7114,5924,6884,126%92%76%80%94%91%Non Tested36211441134322428%8%24%20%6%9%Total4,6474,8555,7265,0104,554
HER 2 Testing in the Public Sector20122013201420152016Tested5,3913,9964,9175,2084,945%85%71%78%87%85%Non Tested9491,6611,367761842%15%29%22%13%15%Total6,3405,6576,2845,9695,787
Citation Format: Palacio S, Torres A, Prado E, Lopes G. Breast cancer in Brazil: HER-2 testing and treatment patterns [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P4-10-20.
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Affiliation(s)
- S Palacio
- Sylvester Comprehensive Cancer Center-University of Miami, Miller School of Medicine, Miami, FL; Close Up International, Sao Paulo, Brazil
| | - A Torres
- Sylvester Comprehensive Cancer Center-University of Miami, Miller School of Medicine, Miami, FL; Close Up International, Sao Paulo, Brazil
| | - E Prado
- Sylvester Comprehensive Cancer Center-University of Miami, Miller School of Medicine, Miami, FL; Close Up International, Sao Paulo, Brazil
| | - G Lopes
- Sylvester Comprehensive Cancer Center-University of Miami, Miller School of Medicine, Miami, FL; Close Up International, Sao Paulo, Brazil
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13
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George SH, Bravo GL, Sandoval AC, Palacio S, Ali J, Donenberg TR, Akbari MR, Narod S, Hurley J. Abstract P4-10-11: An active approach to genetic counseling in Trinidadian women with breast cancer. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p4-10-11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction
Breast cancer (BC) is the leading cause of cancer death in Caribbean women. The prevalence of deleterious mutations in BRCA1/2, PALB2 and RAD51C among unselected BC patients in the Caribbean is 5-25%. We previously reported data on low usage of genetic counseling services by Bahamian women. In order to improve the dissemination of genetic testing results to Caribbean probands and their families we developed a structured approach to genetic test result dissemination and family counseling.
Methods
After approval by the University of Miami IRB and the Ethics Committee of the Ministry of Health of Trinidad & Tobago, we prospectively evaluated the active approach to genetic counseling in 32 BC mutation carriers in Trinidad & Tobago in 2015. The intervention consisted of: 1) initial appointment with referring oncologist for results discussion; 2) review of family tree with proband to identify all relatives at 25% or 50% risk (ARR) who should attend the genetic counseling session; 3) preschedule a counseling appointment for ARR within 2 weeks; 4) written invitation to genetic counseling session; 5) handouts of genetic information given to proband to distribute to family members; 6) offer assistance with contacting family members; 7) free genetic testing to ARR who attended the family counseling session.
Results
Twenty-five carriers (78%) consented to enroll in the study. At initial counseling, probands identified 158 ARR, however full family pedigree review at post-result counseling/consultation identified 225 ARR. 101 ARR (64%) attended the information sessions and 76 participants (75.2%) consented to be tested for BC gene mutations. Genetic sequencing revealed 35 ARR (46%) were carriers of at least one mutation. The most frequent reasons for ARR not attending the meetings were: living abroad (18%), unable to be contacted (17%), refusing to participate (17%), not showing up (17%), probands being estranged from ARR (12%) or being afraid to know the results (7%).
Conclusions
In Trinidad & Tobago, a structured approach to the dissemination of genetic test results leads to a significant improvement in the rate of family participation compared to previous efforts (64% in Trinidad & Tobago vs. 9% in the Bahamas).
Citation Format: George SH, Bravo GL, Sandoval AC, Palacio S, Ali J, Donenberg TR, Akbari MR, Narod S, Hurley J. An active approach to genetic counseling in Trinidadian women with breast cancer [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P4-10-11.
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Affiliation(s)
- SH George
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - GL Bravo
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - AC Sandoval
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - S Palacio
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - J Ali
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - TR Donenberg
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - MR Akbari
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - S Narod
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
| | - J Hurley
- University of Miami Miller School of Medicine, Sylvester Comprehensive Cancer Center, Miami, FL; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Women's Health Unit, St. James Medical Complex, Trinidad and Tobago, Trinidad & Tobago, Trinidad and Tobago
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Palacio S, Lopes G, Mudad R, Prado E. P1.06-018 EGFR Mutations and ALK Gene Rearrangements: Changing Patterns of Molecular Testing in Brazil. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Palacio S, Peignier L, Pachoud C, Nash C, Adam S, Bergeron R, Pellerin D, de Passillé A, Rushen J, Haley D, DeVries T, Vasseur E. Technical note: Assessing lameness in tie-stalls using live stall lameness scoring. J Dairy Sci 2017; 100:6577-6582. [DOI: 10.3168/jds.2016-12171] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 04/19/2017] [Indexed: 11/19/2022]
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Schmid S, Palacio S, Hoch G. Growth reduction after defoliation is independent of CO 2 supply in deciduous and evergreen young oaks. New Phytol 2017; 214:1479-1490. [PMID: 28240369 DOI: 10.1111/nph.14484] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 11/29/2016] [Accepted: 01/18/2017] [Indexed: 06/06/2023]
Abstract
Reduced productivity of trees after defoliation might be caused by limited carbon (C) availability. We investigated the combined effect of different atmospheric CO2 concentrations (160, 280 and 560 ppm) and early season defoliation on the growth and C reserves (nonstructural carbohydrates (NSC)) of saplings of two oak species with different leaf habits (deciduous Quercus petraea and evergreen Quercus ilex). In both species, higher CO2 supply significantly enhanced growth. Defoliation had a strong negative impact on growth (stronger for Q. ilex), but the relative reduction of growth caused by defoliation within each CO2 treatment was very similar across all three CO2 concentrations. Low CO2 and defoliation led to decreased NSC tissue concentrations mainly in the middle of the growing season in Q. ilex, but not in Q. petraea. However, also in Q. ilex, NSC increased in woody tissues in defoliated and low-CO2 saplings towards the end of the growing season. Although the saplings were C limited under these specific experimental conditions, growth reduction after defoliation was not directly caused by C limitation. Rather, growth of trees followed a strong allometric relationship between total leaf area and conductive woody tissue, which did not change across species, CO2 concentrations and defoliation treatments.
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Affiliation(s)
- Sandra Schmid
- Department of Environmental Sciences - Botany, University of Basel, Schönbeinstrasse 6, Basel, CH-4056, Switzerland
| | - Sara Palacio
- Instituto Pirenaico de Ecologia (IPE-CSIC), Av. Nuestra Señora de la Victoria, 16, Jaca, 22700, Spain
| | - Günter Hoch
- Department of Environmental Sciences - Botany, University of Basel, Schönbeinstrasse 6, Basel, CH-4056, Switzerland
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Anadon-Rosell A, Ninot JM, Palacio S, Grau O, Nogués S, Navarro E, Sancho MC, Carrillo E. Four years of experimental warming do not modify the interaction between subalpine shrub species. Oecologia 2017; 183:1167-1181. [PMID: 28190093 DOI: 10.1007/s00442-017-3830-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 01/23/2017] [Indexed: 11/27/2022]
Abstract
Climate warming can lead to changes in alpine plant species interactions through modifications in environmental conditions, which may ultimately cause drastic changes in plant communities. We explored the effects of 4 years of experimental warming with open-top chambers (OTC) on Vaccinium myrtillus performance and its interaction with neighbouring shrubs at the Pyrenean treeline ecotone. We examined the effects of warming on height, above-ground (AG) and below-ground (BG) biomass and the C and N concentration and isotope composition of V. myrtillus growing in pure stands or in stands mixed with Vaccinium uliginosum or Rhododendron ferrugineum. We also analysed variations in soil N concentrations, rhizosphere C/N ratios and the functional diversity of the microbial community, and evaluated whether warming altered the biomass, C and N concentration and isotope composition of V. uliginosum in mixed plots. Our results showed that warming induced positive changes in the AG growth of V. myrtillus but not BG, while V. uliginosum did not respond to warming. Vaccinium myrtillus performance did not differ between stand types under increased temperatures, suggesting that warming did not induce shifts in the interaction between V. myrtillus and its neighbouring species. These findings contrast with previous studies in which species interactions changed when temperature was modified. Our results show that species interactions can be less responsive to warming in natural plant communities than in removal experiments, highlighting the need for studies involving the natural assembly of plant species and communities when exploring the effect of environmental changes on plant-plant interactions.
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Affiliation(s)
- Alba Anadon-Rosell
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Av. Diagonal 643, 08028, Barcelona, Catalonia, Spain.
- Biodiversity Research Institute (IRBio), University of Barcelona, Av. Diagonal 643, 08028, Barcelona, Catalonia, Spain.
| | - Josep M Ninot
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Av. Diagonal 643, 08028, Barcelona, Catalonia, Spain
- Biodiversity Research Institute (IRBio), University of Barcelona, Av. Diagonal 643, 08028, Barcelona, Catalonia, Spain
| | - Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Nuestra Señora de la Victoria 16, 22700, Jaca, Huesca, Spain
| | - Oriol Grau
- CSIC, Global Ecology Unit, CREAF-CSIC-UAB, 08193, Cerdanyola Del Vallès, Catalonia, Spain
- 2CREAF, 08193, Cerdanyola Del Vallès, Catalonia, Spain
| | - Salvador Nogués
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Av. Diagonal 643, 08028, Barcelona, Catalonia, Spain
| | - Enrique Navarro
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Montañana 1005, 50059, Saragossa, Spain
| | - M Carmen Sancho
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Montañana 1005, 50059, Saragossa, Spain
| | - Empar Carrillo
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Av. Diagonal 643, 08028, Barcelona, Catalonia, Spain
- Biodiversity Research Institute (IRBio), University of Barcelona, Av. Diagonal 643, 08028, Barcelona, Catalonia, Spain
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Martínez-Vilalta J, Sala A, Asensio D, Galiano L, Hoch G, Palacio S, Piper FI, Lloret F. Dynamics of non-structural carbohydrates in terrestrial plants: a global synthesis. ECOL MONOGR 2016. [DOI: 10.1002/ecm.1231] [Citation(s) in RCA: 319] [Impact Index Per Article: 39.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jordi Martínez-Vilalta
- CREAF; Cerdanyola del Vallès E-08193 Barcelona Spain
- Universitat Autònoma Barcelona; Cerdanyola del Vallès E-08193 Barcelona Spain
| | - Anna Sala
- Division of Biological Sciences; University of Montana; Missoula Montana 59812 USA
| | | | - Lucía Galiano
- Swiss Federal Research Institute WSL; CH-8903 Birmensdorf Switzerland
- Institute of Hydrology; University of Freiburg; Freiburg D-79098 Germany
| | - Günter Hoch
- Department of Environmental Sciences-Botany; University of Basel; 4056 Basel Switzerland
| | - Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC); Avenida Nuestra Señora de la Victoria 16 22700 Jaca Spain
| | - Frida I. Piper
- Centro de Investigación en Ecosistemas de la Patagonia (CIEP); Simpson 471 Coyhaique Chile
- Instituto de Ecología y Biodiversidad; Las Palmeras 3425 Santiago Chile
| | - Francisco Lloret
- CREAF; Cerdanyola del Vallès E-08193 Barcelona Spain
- Universitat Autònoma Barcelona; Cerdanyola del Vallès E-08193 Barcelona Spain
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Palacio S, Adam S, Bergeron R, Pellerin D, de Passillé AM, Rushen J, Haley DB, DeVries TJ, Vasseur E. 0461 Can regular exercise and more comfortable stalls improve cleanliness and lameness in tie-stall dairy cows? J Anim Sci 2016. [DOI: 10.2527/jam2016-0461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bolukbasi A, Kurt L, Palacio S. Unravelling the mechanisms for plant survival on gypsum soils: an analysis of the chemical composition of gypsum plants from Turkey. Plant Biol (Stuttg) 2016; 18:271-279. [PMID: 26404733 DOI: 10.1111/plb.12401] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 04/30/2015] [Accepted: 09/17/2015] [Indexed: 06/05/2023]
Abstract
Depending on their specificity to gypsum, plants can be classified as gypsophiles (gypsum exclusive) and gypsovags (non-exclusive). The former may further be segregated into wide and narrow gypsophiles, depending on the breadth of their distribution area. Narrow gypsum endemics have a putative similar chemical composition to plants non-exclusive to gypsum (i.e. gypsovags), which may indicate their similar ecological strategy as stress-tolerant plant refugees on gypsum. However, this hypothesis awaits testing in different regions of the world. We compared the chemical composition of four narrow gypsum endemics, one widely distributed gypsophile and six gypsovags from Turkey. Further, we explored the plasticity in chemical composition of Turkish gypsovags growing on high- and low-gypsum content soils. Differences were explored with multivariate analyses (RDA) and mixed models (REML). Narrow gypsum endemics segregated from gypsovags in their chemical composition according to RDAs (mainly due to higher K and ash content in the former). Nevertheless, differences were small and disappeared when different nutrients were analysed individually. All the gypsovags studied accumulated more S and ash when growing on high-gypsum than on low-gypsum soils. Similar to narrow gypsum endemics from other regions of the world, most local gypsum endemics from Turkey show a similar chemical composition to gypsovags. This may indicate a shared ecological strategy as stress-tolerant plants not specifically adapted to gypsum. Nevertheless, the narrow gypsum endemic Gypsophila parva showed a chemical composition typical of gypsum specialists, indicating that various strategies are feasible within narrowly distributed gypsophiles.
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Affiliation(s)
- A Bolukbasi
- Science Faculty, Biology Department, Ecology and Environmental Biology Division, Ankara University, Ankara, Turkey
| | - L Kurt
- Science Faculty, Biology Department, Ecology and Environmental Biology Division, Ankara University, Ankara, Turkey
| | - S Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Jaca, Huesca, Spain
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Quentin AG, Pinkard EA, Ryan MG, Tissue DT, Baggett LS, Adams HD, Maillard P, Marchand J, Landhäusser SM, Lacointe A, Gibon Y, Anderegg WRL, Asao S, Atkin OK, Bonhomme M, Claye C, Chow PS, Clément-Vidal A, Davies NW, Dickman LT, Dumbur R, Ellsworth DS, Falk K, Galiano L, Grünzweig JM, Hartmann H, Hoch G, Hood S, Jones JE, Koike T, Kuhlmann I, Lloret F, Maestro M, Mansfield SD, Martínez-Vilalta J, Maucourt M, McDowell NG, Moing A, Muller B, Nebauer SG, Niinemets Ü, Palacio S, Piper F, Raveh E, Richter A, Rolland G, Rosas T, Saint Joanis B, Sala A, Smith RA, Sterck F, Stinziano JR, Tobias M, Unda F, Watanabe M, Way DA, Weerasinghe LK, Wild B, Wiley E, Woodruff DR. Non-structural carbohydrates in woody plants compared among laboratories. Tree Physiol 2015; 35:1146-1165. [PMID: 26423132 DOI: 10.1093/treephys/tpv073] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [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: 11/22/2014] [Accepted: 07/09/2015] [Indexed: 06/05/2023]
Abstract
Non-structural carbohydrates (NSC) in plant tissue are frequently quantified to make inferences about plant responses to environmental conditions. Laboratories publishing estimates of NSC of woody plants use many different methods to evaluate NSC. We asked whether NSC estimates in the recent literature could be quantitatively compared among studies. We also asked whether any differences among laboratories were related to the extraction and quantification methods used to determine starch and sugar concentrations. These questions were addressed by sending sub-samples collected from five woody plant tissues, which varied in NSC content and chemical composition, to 29 laboratories. Each laboratory analyzed the samples with their laboratory-specific protocols, based on recent publications, to determine concentrations of soluble sugars, starch and their sum, total NSC. Laboratory estimates differed substantially for all samples. For example, estimates for Eucalyptus globulus leaves (EGL) varied from 23 to 116 (mean = 56) mg g(-1) for soluble sugars, 6-533 (mean = 94) mg g(-1) for starch and 53-649 (mean = 153) mg g(-1) for total NSC. Mixed model analysis of variance showed that much of the variability among laboratories was unrelated to the categories we used for extraction and quantification methods (method category R(2) = 0.05-0.12 for soluble sugars, 0.10-0.33 for starch and 0.01-0.09 for total NSC). For EGL, the difference between the highest and lowest least squares means for categories in the mixed model analysis was 33 mg g(-1) for total NSC, compared with the range of laboratory estimates of 596 mg g(-1). Laboratories were reasonably consistent in their ranks of estimates among tissues for starch (r = 0.41-0.91), but less so for total NSC (r = 0.45-0.84) and soluble sugars (r = 0.11-0.83). Our results show that NSC estimates for woody plant tissues cannot be compared among laboratories. The relative changes in NSC between treatments measured within a laboratory may be comparable within and between laboratories, especially for starch. To obtain comparable NSC estimates, we suggest that users can either adopt the reference method given in this publication, or report estimates for a portion of samples using the reference method, and report estimates for a standard reference material. Researchers interested in NSC estimates should work to identify and adopt standard methods.
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Affiliation(s)
- Audrey G Quentin
- CSIRO Land and Water, Private Bag 12, Hobart, Tasmania 7001, Australia Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW 2753, Australia
| | | | - Michael G Ryan
- Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO 80523-1499, USA Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523-1401, USA USDA Forest Service, Rocky Mountain Research Station, Fort Collins, CO 80521, USA
| | - David T Tissue
- Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW 2753, Australia
| | - L Scott Baggett
- USDA Forest Service, Rocky Mountain Research Station, Fort Collins, CO 80521, USA
| | - Henry D Adams
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Pascale Maillard
- INRA, UMR 1137, Ecologie et Ecophysiologie Forestières, Centre de Nancy, F-54280 Champenoux, France
| | - Jacqueline Marchand
- INRA, UMR 1137, Ecologie et Ecophysiologie Forestières, Plateforme Technique d'Ecologie Fonctionnelle (OC 081) Centre de Nancy, F-54280 Champenoux, France
| | - Simon M Landhäusser
- Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada
| | - André Lacointe
- INRA, UMR 0547 PIAF, F:63100 Clermont-Ferrand, France Clermont Université, Université Blaise Pascal, UMR 0547 PIAF, F:6310 Clermont-Ferrand, France
| | - Yves Gibon
- UMR1332, Biologie du Fruit et Pathologie, INRA, Bordeaux University, 71 avenue Edouard Bourlaux, F-33140 Villenave d'Ornon, France Plateforme Métabolome du Centre de Génomique Fonctionnelle Bordeaux, MetaboHUB, IBVM, Centre INRA, 71 avenue Edouard Bourlaux, F-33140 Villenave d'Ornon, France
| | - William R L Anderegg
- Princeton Environmental Institute, Princeton University, Princeton NJ 08540, USA
| | - Shinichi Asao
- Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO 80523-1499, USA Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523-1401, USA
| | - Owen K Atkin
- Division of Plant Sciences, Research School of Biology, Building 46, The Australian National University, Canberra, ACT, 2601, Australia ARC Centre of Excellence in Plant Energy Biology, The Australian National University, Canberra, ACT, 2601, Australia
| | - Marc Bonhomme
- INRA, UMR 0547 PIAF, F:63100 Clermont-Ferrand, France Clermont Université, Université Blaise Pascal, UMR 0547 PIAF, F:6310 Clermont-Ferrand, France
| | - Caroline Claye
- Tasmanian Institute of Agriculture, School of Land and Food, Private Bag 98, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Pak S Chow
- Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada
| | | | - Noel W Davies
- Central Science Laboratory, Private Bag 74, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - L Turin Dickman
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Rita Dumbur
- Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 7610001, Israel
| | - David S Ellsworth
- Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW 2753, Australia
| | - Kristen Falk
- Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR 97331, USA
| | - Lucía Galiano
- Swiss Federal Research Institute WSL, CH-8903 Birmensdorf, Switzerland Institute of Hydrology, Freiburg University, Fahnenbergplatz, D-79098 Freiburg, Germany
| | - José M Grünzweig
- Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 7610001, Israel
| | - Henrik Hartmann
- Max Planck Institute for Biogeochemistry, Hans-Knöll Str. 10, 07745 Jena, Germany
| | - Günter Hoch
- Department of Environmental Sciences - Botany, University of Basel, Schönbeinstrasse 6, CH-4056 Basel, Switzerland
| | - Sharon Hood
- Division of Biological Sciences, University of Montana, Missoula MT-59812, USA
| | - Joanna E Jones
- Tasmanian Institute of Agriculture, School of Land and Food, Private Bag 98, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Takayoshi Koike
- Silviculture and Forest Ecological Studies, Hokkaido University Sapporo, Hokkaido 060-8589, Japan
| | - Iris Kuhlmann
- Max Planck Institute for Biogeochemistry, Hans-Knöll Str. 10, 07745 Jena, Germany
| | - Francisco Lloret
- CREAF, Cerdanyola del Vallès E-08193 Barcelona, Spain Universidad Autònoma Barcelona, Cerdanyola del Vallès E-08193 Barcelona, Spain
| | - Melchor Maestro
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Nuestra Señora de la Victoria s/n, 22700 Jaca, Huesca, Spain
| | - Shawn D Mansfield
- Department of Wood Science, University of British Columbia, V6T 1Z4 Vancouver, Canada
| | - Jordi Martínez-Vilalta
- CREAF, Cerdanyola del Vallès E-08193 Barcelona, Spain Universidad Autònoma Barcelona, Cerdanyola del Vallès E-08193 Barcelona, Spain
| | - Mickael Maucourt
- Plateforme Métabolome du Centre de Génomique Fonctionnelle Bordeaux, MetaboHUB, IBVM, Centre INRA, 71 avenue Edouard Bourlaux, F-33140 Villenave d'Ornon, France Université Bordeaux, UMR 1332, Biologie du Fruit et Pathologie, 71 avenue Edouard Bourlaux, F-33140 Villenave d'Ornon, France
| | - Nathan G McDowell
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Annick Moing
- UMR1332, Biologie du Fruit et Pathologie, INRA, Bordeaux University, 71 avenue Edouard Bourlaux, F-33140 Villenave d'Ornon, France Plateforme Métabolome du Centre de Génomique Fonctionnelle Bordeaux, MetaboHUB, IBVM, Centre INRA, 71 avenue Edouard Bourlaux, F-33140 Villenave d'Ornon, France
| | | | - Sergio G Nebauer
- Plant Production Department, Universitat Politécnica de Valéncia, Camino de vera s.n. 46022-Valencia, Spain
| | - Ülo Niinemets
- Department of Plant Physiology, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Av. Nuestra Señora de la Victoria s/n, 22700 Jaca, Huesca, Spain
| | - Frida Piper
- Centro de Investigación en Ecosistemas de la Patagonia (CIEP), Simpson 471, Coyhaique, Chile
| | - Eran Raveh
- Department of Fruit Trees Sciences, Institute of Plant Sciences, A.R.O., Gilat Research Center, D.N. Negev 85289, Israel
| | - Andreas Richter
- Department of Microbiology and Ecosystem Science, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
| | | | - Teresa Rosas
- CREAF, Cerdanyola del Vallès E-08193 Barcelona, Spain
| | - Brigitte Saint Joanis
- INRA, UMR 0547 PIAF, F:63100 Clermont-Ferrand, France Clermont Université, Université Blaise Pascal, UMR 0547 PIAF, F:6310 Clermont-Ferrand, France
| | - Anna Sala
- Division of Biological Sciences, University of Montana, Missoula MT-59812, USA
| | - Renee A Smith
- Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW 2753, Australia
| | - Frank Sterck
- Forest Ecology and Forest Management Group, Wageningen University, Postbox 47, 6700 AA, Wageningen, the Netherlands
| | - Joseph R Stinziano
- Department of Biology, Western University, 1151 Richmond Street, London, N6A 5B7, ON, Canada
| | - Mari Tobias
- Department of Plant Physiology, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Faride Unda
- Department of Wood Science, University of British Columbia, V6T 1Z4 Vancouver, Canada
| | - Makoto Watanabe
- Institute of Agriculture, Tokyo University of Agriculture and Technology Fuchu, Tokyo 183-8509, Japan
| | - Danielle A Way
- Department of Biology, Western University, 1151 Richmond Street, London, N6A 5B7, ON, Canada Nicholas School of the Environment, Duke University, Box 90328, Durham, NC 27708, USA
| | - Lasantha K Weerasinghe
- Division of Plant Sciences, Research School of Biology, Building 46, The Australian National University, Canberra, ACT, 2601, Australia Faculty of Agriculture, University of Peradeniya, Peradeniya, 20400, Sri Lanka
| | - Birgit Wild
- Department of Microbiology and Ecosystem Science, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria Department of Earth Sciences, University of Gothenburg, Guldhedsgatan 5A, 40530 Gothenburg, Sweden
| | - Erin Wiley
- Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada
| | - David R Woodruff
- USDA Forest Service, Forestry Sciences Laboratory, Corvallis, OR 97331, USA
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Palacio S, Bergeron R, Lachance S, Vasseur E. The effects of providing portable shade at pasture on dairy cow behavior and physiology. J Dairy Sci 2015; 98:6085-93. [DOI: 10.3168/jds.2014-8932] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 05/28/2015] [Indexed: 11/19/2022]
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Martín-Gómez P, Barbeta A, Voltas J, Peñuelas J, Dennis K, Palacio S, Dawson TE, Ferrio JP. Isotope-ratio infrared spectroscopy: a reliable tool for the investigation of plant-water sources? New Phytol 2015; 207:914-27. [PMID: 25790288 DOI: 10.1111/nph.13376] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 11/24/2014] [Accepted: 02/11/2015] [Indexed: 05/16/2023]
Abstract
Stable isotopes are extensively used as tracers for the study of plant-water sources. Isotope-ratio infrared spectroscopy (IRIS) offers a cheaper alternative to isotope-ratio mass spectroscopy (IRMS), but its use in studying plant and soil water is limited by the spectral interference caused by organic contaminants. Here, we examine two approaches to cope with contaminated samples in IRIS: on-line oxidation of organic compounds (MCM) and post-processing correction. We assessed these methods compared to IRMS across 136 samples of xylem and soil water, and a set of ethanol- and methanol-water mixtures. A post-processing correction significantly improved IRIS accuracy in both natural samples and alcohol dilutions, being effective with concentrations up to 8% of ethanol and 0.4% of methanol. MCM outperformed the post-processing correction in removing methanol interference, but did not effectively remove interference for high concentrations of ethanol. By using both approaches, IRIS can overcome with reasonable accuracy the analytical uncertainties associated with most organic contaminants found in soil and xylem water. We recommend the post-processing correction as the first choice for analysis of samples of unknown contamination. Nevertheless, MCM can be more effective for evaluating samples containing contaminants responsible for strong spectral interferences at low concentrations, such as methanol.
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Affiliation(s)
- Paula Martín-Gómez
- Department of Crop and Forest Sciences-AGROTECNIO Center, Universitat de Lleida, Lleida, E-25198, Spain
| | - Adrià Barbeta
- Global Ecology Unit CREAF-CSIC-UAB, CSIC, Cerdanyola del Valles (Catalonia), E-08193, Spain
- CREAF, Cerdanyola del Vallès (Catalonia), E-08193, Spain
| | - Jordi Voltas
- Department of Crop and Forest Sciences-AGROTECNIO Center, Universitat de Lleida, Lleida, E-25198, Spain
| | - Josep Peñuelas
- Global Ecology Unit CREAF-CSIC-UAB, CSIC, Cerdanyola del Valles (Catalonia), E-08193, Spain
- CREAF, Cerdanyola del Vallès (Catalonia), E-08193, Spain
| | - Kate Dennis
- Product Manager for Isotopic Water, Picarro Inc., Santa Clara, CA, 95054, USA
| | - Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Jaca, E-22700, Spain
| | - Todd E Dawson
- Department of Integrative Biology, University of California, Berkeley, CA, 94720, USA
| | - Juan Pedro Ferrio
- Department of Crop and Forest Sciences-AGROTECNIO Center, Universitat de Lleida, Lleida, E-25198, Spain
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Palacio S, Aitkenhead M, Escudero A, Montserrat-Martí G, Maestro M, Robertson AHJ. Gypsophile chemistry unveiled: Fourier transform infrared (FTIR) spectroscopy provides new insight into plant adaptations to gypsum soils. PLoS One 2014; 9:e107285. [PMID: 25222564 PMCID: PMC4164602 DOI: 10.1371/journal.pone.0107285] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 08/12/2014] [Indexed: 11/30/2022] Open
Abstract
Gypsum soils are among the most restrictive and widespread substrates for plant life. Plants living on gypsum are classified as gypsophiles (exclusive to gypsum) and gypsovags (non-exclusive to gypsum). The former have been separated into wide and narrow gypsophiles, each with a putative different ecological strategy. Mechanisms displayed by gypsum plants to compete and survive on gypsum are still not fully understood. The aim of this study was to compare the main chemical groups in the leaves of plants with different specificity to gypsum soils and to explore the ability of Fourier transform infrared (FTIR) spectra analyzed with neural network (NN) modelling to discriminate groups of gypsum plants. Leaf samples of 14 species with different specificity to gypsum soils were analysed with FTIR spectroscopy coupled to neural network (NN) modelling. Spectral data were further related to the N, C, S, P, K, Na, Ca, Mg and ash concentrations of samples. The FTIR spectra of the three groups analyzed showed distinct features that enabled their discrimination through NN models. Wide gypsophiles stood out for the strong presence of inorganic compounds in their leaves, particularly gypsum and, in some species, also calcium oxalate crystals. The spectra of gypsovags had less inorganic chemical species, while those of narrow gypsum endemisms had low inorganics but shared with wide gypsophiles the presence of oxalate. Gypsum and calcium oxalate crystals seem to be widespread amongst gypsum specialist plants, possibly as a way to tolerate excess Ca and sulphate. However, other mechanisms such as the accumulation of sulphates in organic molecules are also compatible with plant specialization to gypsum. While gypsovags seem to be stress tolerant plants that tightly regulate the uptake of S and Ca, the ability of narrow gypsum endemisms to accumulate excess Ca as oxalate may indicate their incipient specialization to gypsum.
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Affiliation(s)
- Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Jaca, Huesca, Spain
- * E-mail:
| | - Matt Aitkenhead
- The James Hutton Institute, Aberdeen, Scotland, United Kingdom
| | - Adrián Escudero
- Biodiversity and Conservation Group, E.S.C.E.T., Universidad Rey Juan Carlos, Móstoles, Madrid, Spain
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Palacio S, Giugno H, Díaz Casaux A, Lucero B, Smith S, Giorgetti M, Bonina Á, Castaños C. WS3.5 Inhaled 7% hypertonic saline treatment in preschool children with cystic fibrosis. J Cyst Fibros 2014. [DOI: 10.1016/s1569-1993(14)60023-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Palacio S, Maestro M, Montserrat-Martí G. Differential nitrogen cycling in semiarid sub-shrubs with contrasting leaf habit. PLoS One 2014; 9:e93184. [PMID: 24675650 PMCID: PMC3968058 DOI: 10.1371/journal.pone.0093184] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 02/28/2014] [Indexed: 11/19/2022] Open
Abstract
Nitrogen (N) is, after water, the most limiting resource in semiarid ecosystems. However, knowledge on the N cycling ability of semiarid woody plants is still very rudimentary. This study analyzed the seasonal change in the N concentrations and pools of the leaves and woody organs of two species of semiarid sub-shrubs with contrasting leaf habit. The ability of both species to uptake, remobilize and recycle N, plus the main storage organ for N during summer drought were evaluated. We combined an observational approach in the field with experimental 15N labelling of adult individuals grown in sand culture. Seasonal patterns of N concentrations were different between species and organs and foliar N concentrations of the summer deciduous Lepidium subulatum were almost double those of the evergreen Linum suffruticosum. L. subulatum up took ca. 60% more external N than the evergreen and it also had a higher N resorption efficiency and proficiency. Contrastingly, L. suffruticosum relied more on internal N remobilization for shoot growth. Differently to temperate species, the evergreen stored N preferentially in the main stem and old trunks, while the summer deciduous stored it in the foliage and young stems. The higher ability of L. subulatum to uptake external N can be related to its ability to perform opportunistic growth and exploit the sporadic pulses of N typical of semiarid ecosystems. Such ability may also explain its high foliar N concentrations and its preferential storage of N in leaves and young stems. Finally, L. suffruticosum had a lower ability to recycle N during leaf senescence. These strategies contrast with those of evergreen and deciduous species from temperate and boreal areas, highlighting the need of further studies on semiarid and arid plants.
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Affiliation(s)
- Sara Palacio
- Instituto Pirenaico de Ecología (IPE-CSIC), Avda. Nuestra Señora de la Victoria, Jaca, Huesca, Spain
- * E-mail:
| | - Melchor Maestro
- Instituto Pirenaico de Ecología (IPE-CSIC), Avda. Montañana, Zaragoza, Spain
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Affiliation(s)
- Sara Palacio
- Pyrenean Institute of Ecology (IPE-CSIC), Avda. Nuestra Señora de la Victoria s/n, 22700, Jaca, Huesca, Spain
| | - Günter Hoch
- Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056, Basel, Switzerland
| | - Anna Sala
- Division of Biological Sciences, University of Montana, Missoula, MT, 59812, USA
| | - Christian Körner
- Institute of Botany, University of Basel, Schönbeinstrasse 6, 4056, Basel, Switzerland
| | - Pete Millard
- Landcare Research, Lincoln PO Box 69040, Lincoln, 7640, New Zealand
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Affiliation(s)
- Adrián Escudero
- Biodiversity and Conservation Unit, Department of Biology and Geology; Universidad Rey Juan Carlos; Móstoles Madrid E-28933 Spain
| | - Sara Palacio
- Conservation of Biodiversity and Ecosystem Restoration, Pyrenean Institute of Ecology (IPE-CSIC); Jaca Huesca E-22700 Spain
| | - Fernando T. Maestre
- Biodiversity and Conservation Unit, Department of Biology and Geology; Universidad Rey Juan Carlos; Móstoles Madrid E-28933 Spain
| | - Arantzazu L. Luzuriaga
- Biodiversity and Conservation Unit, Department of Biology and Geology; Universidad Rey Juan Carlos; Móstoles Madrid E-28933 Spain
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Camarero JJ, Palacio S, Montserrat-Martí G. Contrasting seasonal overlaps between primary and secondary growth are linked to wood anatomy in Mediterranean sub-shrubs. Plant Biol (Stuttg) 2013; 15:798-807. [PMID: 23173598 DOI: 10.1111/j.1438-8677.2012.00702.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 10/10/2012] [Indexed: 06/01/2023]
Abstract
Whole-plant approaches allow quantification of the temporal overlap between primary and secondary growth. If the amount of time available to grow is short, there may be a high temporal overlap between shoot growth and wood formation. We hypothesise that such overlap depends on the duration of the growing season and relates to wood anatomy. We evaluated wood anatomy, shoot longitudinal and radial growth rates, fine root production and the concentrations of non-structural carbohydrates (NSC) in the wood of six sub-shrub species growing in sites with contrasting climatic conditions (Lepidium subulatum, Linum suffruticosum, Salvia lavandulifolia, Satureja montana, Ononis fruticosa, Echinospartum horridum). Sub-shrub species living in sites with a short growing season displayed a high overlap between aboveground primary and secondary growth and formed wide vessels, whereas species from the warmest and driest sites presented the reverse characteristics. The highest overlap was linked to a rapid shoot extension and thickening through the enhanced hydraulic conductivity provided by wide vessels. The reductions in NSC concentrations when growth peaked were low or moderate, indicating that sub-shrubs accumulate NSC in excess, as do trees. The temporal overlap among primary and secondary growth in woody plants may be connected to the duration and rates of shoot and wood growth, which in turn depend on the vessel lumen area.
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Affiliation(s)
- J J Camarero
- ARAID - Pyrenean Institute of Ecology (IPE-CSIC), Zaragoza, Spain.
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Palacio S, Bueno CG, Azorín J, Maestro M, Gómez-García D. Wild-boar disturbance increases nutrient and C stores of geophytes in subalpine grasslands. Am J Bot 2013; 100:1790-1799. [PMID: 23997207 DOI: 10.3732/ajb.1300002] [Citation(s) in RCA: 12] [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] [Indexed: 06/02/2023]
Abstract
PREMISE OF THE STUDY Wild-boar soil disturbance (i.e., rooting) increases the abundance of some species of geophytes (i.e., plants with underground renewal buds) in upland meadows. However, the mechanisms that could lead to such enhanced prevalence remain unexplored. • METHODS We analyzed the effects of wild-boar disturbance on the size, nutrient (N, P, K, C, and total ash), and nonstructural carbohydrate (soluble sugars, starch plus fructans, and total nonstructural carbohydrate) content of the storage organs of five taxa of upland geophytes. Results were explored in relation to the nutrient availability (total N, available P, and K) in the soil. • KEY RESULTS Wild-boar rooting increased the size and the nutrient content of the storage organs of geophytes. Such enhanced storage was further promoted by rooting recurrence and intensity. Although we could not detect a direct impact of rooting on soil nutrient concentrations, plants were clearly N limited and such limitation was ameliorated in areas rooted by wild boar. Furthermore, plant-soil interactions for N were different in rooted areas, where plant N-concentrations responded positively to soil N. • CONCLUSIONS Geophytes growing in rooted areas have an increased nutrient value, which may promote the revisit of wild boars to previously rooted areas, with further positive feed-back effects on plant quality. This plant-animal interaction may shape upland geophyte communities.
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Affiliation(s)
- Sara Palacio
- Pyrenean Institute of Ecology (CSIC), Avda. Nuestra Señora de la Victoria, s/n 22700 Jaca (Huesca), Spain
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Palacio S, Hester AJ, Maestro M, Millard P. Simulated browsing affects leaf shedding phenology and litter quality of oak and birch saplings. Tree Physiol 2013; 33:438-445. [PMID: 23574752 DOI: 10.1093/treephys/tpt023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Herbivore effects on leaf litter can have a strong impact on ecosystem nutrient cycling. Although such effects are well described for insect herbivory, research on the impacts of browsing by mammalian herbivores on leaf litter dynamics and nutrient cycling has been more limited, particularly at the level of the individual plant. Clipping treatments (66% shoot removal twice, plus unclipped) were applied to analyse the effect of browsing on the phenology (start date and pattern of leaf shedding) and leaf litter quality (nitrogen (N), soluble sugars, starch and total non-structural carbohydrate concentrations, plus C : N ratios) of Betula pubescens Ehrh. and Quercus petraea [Matt.] Liebl. saplings. Clipping decreased leaf litter biomass and delayed leaf senescence and shedding, but did not change the phenological timing of litterfall between senescence and shedding. The quality of leaf litter of both species was increased by simulated browsing, through an increase in N and carbohydrate concentrations (mainly soluble sugars) and a decreased C : N ratio. This is the first evidence we are aware of that browsing may cause changes in leaf shedding phenology, delaying the process without altering its pattern. Our results also indicate that simulated browsing increases the quality of leaf litter. However, the potential positive effect of browsing on N cycling through litter quality may be offset by its negative impact on the amount of N shed per tree.
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Affiliation(s)
- S Palacio
- The James Hutton Institute, Craigiebuckler AB15 8QH Aberdeen, UK.
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Palacio S, Paterson E, Sim A, Hester AJ, Millard P. Browsing affects intra-ring carbon allocation in species with contrasting wood anatomy. Tree Physiol 2011; 31:150-9. [PMID: 21388994 DOI: 10.1093/treephys/tpq110] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Current knowledge on tree carbon (C) allocation to wood is particularly scarce in plants subjected to disturbance factors, such as browsing, which affects forest regeneration worldwide and has an impact on the C balance of trees. Furthermore, quantifying the degree to which tree rings are formed from freshly assimilated vs. stored carbohydrates is highly relevant for our understanding of tree C allocation. We used (13)C labelling to quantify seasonal allocation of stored C to wood formation in two species with contrasting wood anatomy: Betula pubescens Ehrh. (diffuse-porous) and Quercus petraea [Matt.] Liebl. (ring-porous). Clipping treatments (66% shoot removal, and unclipped) were applied to analyse the effect of browsing on C allocation into tree rings, plus the effects on tree growth, architecture, ring width and non-structural carbohydrates (NSCs). The relative contribution of stored C to wood formation was greater in the ring-porous (55-70%) than in the diffuse-porous species (35-60%), although each species followed different seasonal trends. Clipping did not cause a significant depletion of C stores in either species. Nonetheless, a significant increase in the proportion of stored C allocated to earlywood growth was observed in clipped birches, and this could be explained through changes in tree architecture after clipping. The size of C pools across tree species seems to be important in determining the variability of seasonal C allocation patterns to wood and their sensibility to disturbances such as browsing. Our results indicate that the observed changes in C allocation to earlywood in birch were not related to variations in the amount or concentration of NSC stores, but to changes in the seasonal availability of recently assimilated C caused by modifications in tree architecture after browsing.
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Affiliation(s)
- S Palacio
- Macaulay Institute, Craigiebuckler, Aberdeen, UK.
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Paula S, Arianoutsou M, Kazanis D, Tavsanoglu Ç, Lloret F, Buhk C, Ojeda F, Luna B, Moreno JM, Rodrigo A, Espelta JM, Palacio S, Fernández-Santos B, Fernandes PM, Pausas JG. Fire-related traits for plant species of the Mediterranean Basin. Ecology 2009. [DOI: 10.1890/08-1309.1] [Citation(s) in RCA: 192] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Palacio S, Milla R, Albuixech J, Pérez-Rontomé C, Camarero JJ, Maestro M, Montserrat-Martí G. Seasonal variability of dry matter content and its relationship with shoot growth and nonstructural carbohydrates. New Phytol 2008; 180:133-142. [PMID: 18643937 DOI: 10.1111/j.1469-8137.2008.02569.x] [Citation(s) in RCA: 4] [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] [Indexed: 05/26/2023]
Abstract
This study assesses how different phases of shoot growth underlie seasonal change in leaf and stem dry matter content (LDMC and SDMC, respectively) of 12 woody Mediterranean species. The relationship between LDMC and nonstructural carbohydrate (NSC) concentrations is also explored and the seasonal vs interspecies variability of LDMC compared. LDMC, SDMC and shoot elongation rate (SER) were measured on a monthly basis for a minimum of 12 months. Bud growth rate (BGR) and NSC concentrations were also assessed in several of the study species. LDMC and SDMC decreased during shoot elongation in spring and increased in summer, showing a significant negative correlation with SER, but were unrelated to BGR. Half of the species analysed showed a positive relationship between LDMC and NSC. Seasonal fluctuations of LDMC within species were higher than interspecies differences, and species ranking was significantly affected by the month of sampling, except during winter months. Seasonal changes in LDMC and SDMC are mainly related to shoot elongation phenology, and NSC sink-source relationships between old and growing organs can explain this relationship in some species. Owing to the high seasonal variability in LDMC, it is recommended that samples for comparative purposes should be collected as close to the winter as possible.
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Affiliation(s)
- Sara Palacio
- Instituto Pirenaico de Ecología (CSIC). Apdo. 202, 50192 Zaragoza, Spain
- Current address: Macaulay Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
| | - Rubén Milla
- Area de Biodiversidad y Conservación, Universidad Rey Juan Carlos. C/Tulipán s/n, 28933 Móstoles-Madrid, Spain
| | - Jorge Albuixech
- Instituto Pirenaico de Ecología (CSIC). Apdo. 202, 50192 Zaragoza, Spain
| | - Carmen Pérez-Rontomé
- Estación Experimental de Aula Dei (CSIC), Avda Montañana 1.005-50192 Zaragoza, Spain
| | | | - Melchor Maestro
- Instituto Pirenaico de Ecología (CSIC). Apdo. 202, 50192 Zaragoza, Spain
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Palacio S, Maestro M, Montserrat-Martí G. Relationship between shoot-rooting and root-sprouting abilities and the carbohydrate and nitrogen reserves of Mediterranean dwarf shrubs. Ann Bot 2007; 100:865-74. [PMID: 17728338 PMCID: PMC2749641 DOI: 10.1093/aob/mcm185] [Citation(s) in RCA: 18] [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: 02/15/2007] [Revised: 04/20/2007] [Accepted: 06/25/2007] [Indexed: 05/17/2023]
Abstract
BACKGROUND AND AIMS This study analysed the differences in nitrogen (N), non-structural carbohydrates (NSC) and biomass allocation to the roots and shoots of 18 species of Mediterranean dwarf shrubs with different shoot-rooting and resprouting abilities. Root N and NSC concentrations of strict root-sprouters and species resprouting from the base of the stems were also compared. METHODS Soluble sugars (SS), starch and N concentrations were assessed in roots and shoots. The root : shoot ratio of each species was obtained by thorough root excavations. Cross-species analyses were complemented by phylogenetically independent contrasts (PICs). KEY RESULTS Shoot-rooting species showed a preferential allocation of starch to shoots rather than roots as compared with non-shoot-rooting species. Resprouters displayed greater starch concentrations than non-sprouters in both shoots and roots. Trends were maintained after PICs analyses, but differences became weak when root-sprouters versus non-root-sprouters were compared. Within resprouters, strict root-sprouters showed greater root concentrations and a preferential allocation of starch to the roots than stem-sprouters. No differences were found in the root : shoot ratio of species with different rooting and resprouting abilities. CONCLUSIONS The shoot-rooting ability of Mediterranean dwarf shrubs seems to depend on the preferential allocation of starch and SS to shoots, though alternative C-sources such as current photosynthates may also be involved. In contrast to plants from other mediterranean areas of the world, the resprouting ability of Mediterranean dwarf shrubs is not related to a preferential allocation of N, NSC and biomass to roots.
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Affiliation(s)
- Sara Palacio
- Pyrenean Institute of Ecology (CSIC). Av. Montañana, 1005. Apdo. 202. 50192 Zaragoza, Spain.
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Milla R, Palacio S, Maestro-Martínez M, Montserrat-Martí G. Leaf exchange in a Mediterranean shrub: water, nutrient, non-structural carbohydrate and osmolyte dynamics. Tree Physiol 2007; 27:951-60. [PMID: 17403647 DOI: 10.1093/treephys/27.7.951] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Leaf exchange is an abrupt phenological event that drastically modifies the morphology and physiology of the aerial portion of the plant. We examined if water and osmolyte differences between old leaves and new organs trigger leaf exchange, and whether the differences are closely linked to the resource resorption process in senescing leaves. We monitored concentrations of osmolyte, water, non-structural carbohydrate, nitrogen and potassium in senescing leaves and in emerging new leaves and inflorescences of a Mediterranean leaf exchanger (Cistus laurifolius L.) growing in NE Spain. Old leaves rehydrated markedly during most of the senescence process, which co-occurred with the extension of new shoots, suggesting the lack of a clear-cut switch in water supply from old to new organs. The accumulation of osmolytes in the early stage of leaf senescence might account for this rehydration. Osmolyte dynamics in old leaves depended largely on the progression of resource resorption from senescing organs but were mostly unrelated to water content during late senescence. We conclude that dehydration of old leaves is not a prerequisite for the triggering of leaf exchange. The finding that most nutrients and carbohydrates accumulated in new organs before senescing leaves massively exported resources, and the absence of relevant differences between the dynamics of old leaves at the base of inflorescences and those at the base of vegetative shoots, indicate that the nutrient and carbohydrate demands of new organs do not trigger leaf exchange.
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Affiliation(s)
- R Milla
- Department of Forest Resources, University of Minnesota, St. Paul, MN 55108, USA.
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Abstract
BACKGROUND AND AIMS Plants from gypsum habitats are classified as gypsophiles and gypsovags. The former include both narrow endemics limited to small gypsum areas and regionally dominant gypsophiles growing in gypsum areas of large regions, whereas gypsovags are plants that can grow both in gypsum and non-gypsum soils. Factors controlling the distribution of gypsum plants are still not fully understood. METHODS To assess how the different types of gypsum plants deal with the stressful conditions of gypsum substrates, comparisons were made of the leaf chemical composition of four gypsovags, five regionally dominant gypsophiles and four narrow gypsum endemics growing in two massive gypsum areas of the Iberian Peninsula. KEY RESULTS The chemical composition of gypsovags was clearly different from regionally dominant gypsophiles, while the chemical composition of narrow-gypsophile endemics was more similar to the chemical composition of gypsovags than to that of regionally dominant gypsophiles. Regionally dominant gypsophiles showed higher concentrations of ash, Ca, S, N, Mg P and Na, whereas gypsovags and local gypsophile endemics displayed higher concentrations of C and greater C : N ratios. CONCLUSIONS Such differences suggest that the three groups of gypsum plants follow diverse ecological strategies. It is suggested that regionally dominant gypsophiles might fit the 'specialist' model, being species specifically adapted to gypsum, whereas both gypsovags and narrow-gypsophile endemics might fit the 'refuge' model, being stress-tolerant species that find refuge on gypsum soils from competition. The analysis of the leaf chemical composition could be a good predictor of the degree of plants specialization to gypsum soils.
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Affiliation(s)
- Sara Palacio
- Pyrenean Institute of Ecology (CSIC), Av. Montañana 1005, Apdo. 202, 50192 Zaragoza, Spain.
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Palacio S, Millard P, Maestro M, Montserrat-Martí G. Non-structural carbohydrates and nitrogen dynamics in mediterranean sub-shrubs: an analysis of the functional role of overwintering leaves. Plant Biol (Stuttg) 2007; 9:49-58. [PMID: 16883482 DOI: 10.1055/s-2006-924224] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Previous studies have led to contrasting results about the role of overwintering leaves as storage sites, which is related to leaf longevity and life-form. The aim of this study was to evaluate the functional role of the leaves of four species of Mediterranean sub-shrubs, with different leaf phenology, as sources of nitrogen (N) and non-structural carbohydrates (NSC) for shoot growth. The seasonal dynamics of the concentrations and pools of N and NSC were assessed monthly in the leaves and woody organs of each species. Overwintering and spring leaves served as N and NSC sources for shoot growth in the evergreen species analyzed, providing up to 73 % and 324 % of the N demand for spring and autumn growth, respectively. Excess autumn N was stored in woody structures which contributed to the N and NSC requirements of spring growth. In the winter deciduous species, woody organs were the main N source for spring growth, while current photosynthesis from immature brachyblasts seemed to be the main carbon (C) source. Due to their short lifespan, overwintering and spring leaves did not show several translocation processes throughout their life time, their contribution to new growth being made during senescence. The successive exchange of leaf cohorts displayed by Mediterranean sub-shrubs might serve as a mechanism to recycle N and C between consecutive cohorts as plants perform the pheno-morphological changes needed to adapt their morphology to the seasonality of their environment.
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Affiliation(s)
- S Palacio
- Pyrenean Institute of Ecology (CSIC), Zaragoza, Spain.
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Buonanotte F, Schurrer C, Carpinella M, Surur A, Marangoni A, Palacio S, Forteza M, Fernandez R, Enders J. [Alteration of the antinociceptive systems in chronic daily headaches]. Rev Neurol 2006; 43:263-7. [PMID: 16941423] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
INTRODUCTION Chronic daily headache (CDH) is a chronic painful clinical condition that is frequently found in neurological practice. Diagnosis is clinical and the therapeutic approach is complex. Its mechanism of production is still not altogether clear, but a genetic component is acknowledged as a predisposing factor. Numerous areas are involved in the generation of primary headaches, including the periaqueductal grey matter (PAGM), which plays a role as a neuromodulator both in headaches and in other chronic painful conditions. AIMS In order to evaluate possible biochemical changes in patients with CDH, magnetic resonance imaging was used to study the spectra produced in the PAGM. SUBJECTS AND METHODS The spectra in the PAGM were studied in 17 patients with CDH. These were compared with the average spectra in 17 healthy subjects by means of differential spectroscopy. RESULTS Subjects with CDH show a reduction of over 70% in the level of the metabolite N-acetyl-aspartyl-glutamate (NAAG) in the PAGM. NAAG is a peptide involved in antinociceptive activity. CONCLUSIONS The reduction of NAAG in the PAGM suggests altered neuromodulation of the antinociceptive systems in subjects with CDH. Whether CDH is the cause or the consequence has still to be determined.
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Affiliation(s)
- F Buonanotte
- Facultad de Ciencias Médicas, Universidad Nacional de Cordoba, Cordoba, Argentina.
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Guerrero-Campo J, Palacio S, Pérez-Rontomé C, Montserrat-Martí G. Effect of root system morphology on root-sprouting and shoot-rooting abilities in 123 plant species from eroded lands in North-east Spain. Ann Bot 2006; 98:439-47. [PMID: 16790468 PMCID: PMC2803465 DOI: 10.1093/aob/mcl122] [Citation(s) in RCA: 11] [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] [Indexed: 05/07/2023]
Abstract
BACKGROUND AND AIMS The objective of this study was to test whether the mean values of several root morphological variables were related to the ability to develop root-borne shoots and/or shoot-borne roots in a wide range of vascular plants. METHODS A comparative study was carried out on the 123 most common plant species from eroded lands in north-east Spain. After careful excavations in the field, measurements were taken of the maximum root depth, absolute and relative basal root diameter, specific root length (SRL), and the root depth/root lateral spread ratio on at least three individuals per species. Shoot-rooting and root-sprouting were observed in a large number of individuals in many eroded and sedimentary environments. The effect of life history and phylogeny on shoot-rooting and root-sprouting abilities was also analysed. KEY RESULTS The species with coarse and deep tap-roots tended to be root-sprouting and those with fine, fasciculate and long main roots (which generally spread laterally), tended to be shoot-rooting. Phylogeny had an important influence on root system morphology and shoot-rooting and root-sprouting capacities. However, the above relations stood after applying analyses based on phylogenetically independent contrasts (PICs). CONCLUSIONS The main morphological features of the root system of the study species are related to their ability to sprout from their roots and form roots from their shoots. According to the results, such abilities might only be functionally viable in restricted root system morphologies and ecological strategies.
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Buonanotte F, Schurrer C, Carpinella M, Surur A, Marangoni A, Palacio S, Forteza M, Fernández R, Enders J. Alteración de los sistemas antinociceptivos en las cefaleas crónicas diarias. Rev Neurol 2006. [DOI: 10.33588/rn.4305.2005706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Palacio S, Montserrat-Martí G. Bud morphology and shoot growth dynamics in two species of Mediterranean sub-shrubs co-existing in gypsum outcrops. Ann Bot 2005; 95:949-958. [PMID: 15753117 PMCID: PMC4246757 DOI: 10.1093/aob/mci110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [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: 11/08/2004] [Revised: 12/14/2004] [Accepted: 01/24/2005] [Indexed: 05/24/2023]
Abstract
BACKGROUND AND AIMS Understanding the effects of the environment on the morphology and shoot growth activities of plants is crucial to identifying plant ecological strategies. This study analysed the bud morphology, bud activity, shoot growth dynamics and shoot water content at full hydration (WC(h)) of two species of Mediterranean sub-shrubs, Lepidium subulatum and Linum suffruticosum, co-existing in gypsum outcrops in north-east Spain. METHODS Sampling was conducted monthly over 2 years in one population per species. Buds were dissected under a stereo-microscope. Shoot growth was measured as the mean increase in shoot length of 15 marked individuals between two consecutive samplings. Bud activity was studied following the variations in the number of leaf primordia shorter than 1 mm and longer than 0.025 mm in the buds. KEY RESULTS Both species bore naked buds and displayed discontinuous seasonal patterns of shoot growth, leaf primordia formation and WC(h). The number of leaf primordia in the bud peaked before the beginning of shoot expansion. In both species, organogenesis and expansion were uncoupled throughout the year. The time lapse between these two processes varied throughout the year, and was greatest for those elements differentiated in autumn. WC(h) was more closely related to shoot expansion than to organogenesis. CONCLUSIONS Both species displayed similar bud morphology and similar seasonal patterns of bud and shoot growth, and WC(h) as a result of the strong seasonality of the Mediterranean climate in gypsum outcrops. The beginning of the spring period of expansion of long branches coincided with maximum values of WC(h), while the rest period of summer matched minimum values. These results support the hypothesis that the growth of long branches is strongly related to WC(h).
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Affiliation(s)
- Sara Palacio
- Instituto Pirenaico de Ecología, P.O. Box 202, 50080 Zaragoza, Spain.
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Abstract
During our survey of herbs looking for activity on bone metabolism, we found that the dried leaves of sage strongly inhibit bone resorption. Therefore, we investigated several common herbs rich in essential oils (sage, rosemary, and thyme) and essential oils extracted from these herbs and other plants (oils of sage, rosemary, juniper, pine, dwarf pine, turpentine, and eucalyptus) as well as their monoterpene components (thujone, eucalyptol, camphor, borneol, thymol, alpha-pinene, beta-pinene, bornylacetate as well as menthol) and found that they inhibit bone resorption when added to the food of rats. Pine oil, used as a representative essential oil, protects an osteoporosis model, the aged ovariectomized rat, from bone loss. The monoterpenes borneol, thymol, and camphor are directly inhibitory in the osteoclast resorption pit assay. Nonpolar monoterpenes may require metabolism to be active in vitro, for example, cis-verbenol, a metabolite of alpha-pinene occurring in human urine, inhibits osteoclast activity in contrast to the parent compound. Within 30 min borneol inhibits the formation of actin rings, a characteristic of resorbing osteoclasts indicating cell polarization. Both the in vitro and the in vivo effects of borneol are reversible. Our study demonstrates for the first time that essential oils and monoterpenes are efficient inhibitors of bone resorption in the rat.
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Affiliation(s)
- R C Mühlbauer
- Bone Biology Group, Department of Clinical Research, University of Bern, Murtenstrasse 35, Switzerland.
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Abstract
BACKGROUND Colony-stimulating factor-1 (CSF-1), a growth and survival factor for osteoclasts, stimulates these cells to spread and migrate towards a gradient of CSF-1. This may support the translocation of osteoclasts to new sites on the bone surface to be resorbed. Phosphoinositide 3-kinase (PI 3-K) is a lipid kinase participating in various signal transduction pathways. OBJECTIVE To investigate the role of PI 3-K in the CSF-1-induced spreading of osteoclasts. METHODS In isolated rat osteoclasts treated with or without CSF-1, the distribution of PI 3-K and proteins phosphorylated on tyrosine were investigated using immunofluorescence. In murine osteoclast-like cells grown from bone marrow cells co-cultured with osteoblasts, the activation of the PI 3-K by CSF-1 was determined both in vivo and in vitro. In vivo, the enzyme product in the cell was determined after extraction and separation with thin layer chromatography; in vitro, PI 3-K activity was measured in the pellet immunoprecipitated from the cell lysate. RESULTS Inhibition of PI 3-K blocked the CSF-1-induced spreading of osteoclasts. In spreading osteoclasts, a portion of PI 3-K was translocated to the periphery where proteins phosphorylated on tyrosine appeared simultaneously. In osteoclast-like cells, CSF-1 stimulated PI 3-K activity. This activity could be immunoprecipitated with antibody against phophotyrosine residues. CONCLUSION PI 3-K participates in the CSF-1-induced spreading of osteoclasts. The activated PI 3-K may induce the reorganization of the cytoskeleton resulting in spreading and migration.
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Affiliation(s)
- S Palacio
- Department Clinical Research, Bone Biology, University of Bern, Bern, Switzerland
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Abstract
Mycoplasmas may be associated with rheumatoid arthritis in various animal hosts. In humans, mycoplasma arthritis has been recorded in association with hypogammaglobulinemia. Mycoplasma fermentans is one mycoplasma species considered to be involved in causing arthritis. To clarify which mycoplasmal compounds contribute to the inflammatory, bone-destructive processes in arthritis, we used a well-defined lipopeptide, 2-kDa macrophage-activating lipopeptide (MALP-2) from M. fermentans, as an example of a class of macrophage-activating compounds ubiquitous in mycoplasmas, to study its effects on bone resorption. MALP-2 stimulated osteoclast-mediated bone resorption in murine calvaria cultures, with a maximal effect at around 2 nM. Anti-inflammatory drugs inhibited MALP-2-mediated bone resorption by about 30%. This finding suggests that MALP-2 stimulates bone resorption partially by stimulating the formation of prostaglandins. Since interleukin-6 (IL-6) stimulates bone resorption, we investigated IL-6 production in cultured calvaria. MALP-2 stimulated the liberation of IL-6, while no tumor necrosis factor was detectable. Additionally, MALP-2 stimulated low levels of NO in calvaria cultures, an effect which was strongly increased in the presence of gamma interferon, causing an inhibition of bone resorption. MALP-2 stimulated the bone-resorbing activity of osteoclasts isolated from long bones of newborn rats and cultured on dentine slices without affecting their number. In bone marrow cultures, MALP-2 inhibited the formation of osteoclasts. It appears that MALP-2 has two opposing effects: it increases the bone resorption in bone tissue by stimulation of mature osteoclasts but inhibits the formation of new ones.
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Affiliation(s)
- G Piec
- Department of Clinical Research, Bone Biology, University of Bern, CH-3010 Bern, Switzerland
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Rabinstein A, Caeiro E, Navarro R, Babini D, Caeiro P, Combes A, Palacio S, Caeiro T. [Survival of patients with myasthenia gravis after thymectomy. Analysis of 100 cases]. Medicina (B Aires) 1998; 57:131-8. [PMID: 9532821] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
In order to evaluate the survival of patients with myasthenia gravis (MG) after thymectomy (T), 100 patients with MG in which T had been performed between 1967 and 1995 were studied. Patients were divided into different groups for their analysis: patients with thymoma (TI), 22 cases; and patients without thymoma (NTI), 78 cases. In addition those patients belonging to the latter group were further separated according to the date of their surgery into two other subgroups: patients operated before 1980 (A80), 43 cases; and after 1980 (D80), 35 cases; trying to evaluate the prognostic implications of the therapeutical advances achieved over the last 15 years. The population studied was composed mainly of women (78%) but with a slight predominance of men in TI. The mean age was 29.47 years (range 10-70) for the entire population, with a tendency toward older ages in TI (mean 46 years, range 23-70). The mean follow-up period was 4.3 years (range 0.08-23.2) without significant differences between TI and NTI. The results showed that the overall mortality rate was 16/100 (16%) [Fig. 1], with nine of those deaths corresponding to TI (9/22, 40.91%) and only the remaining seven to NTI (7/78, 8.97%). These differences in mortality rate between TI and NTI were statistically significant in all the specific times of follow-up analyzed up to 10 years after surgery (p < 0.05) [Fig. 2]. Notoriously, all deaths in NTI occurred in the A80 subgroup giving a p value < 0.001 when compared with D80 [Fig. 3]. In terms of morbidity, 55/100 (55%) reached complete clinical remission (CCR) defined by the complete absence of symptoms related to MG: 8/22 (36.36%) in TI and 47/78 (60.25%) in NTI [Fig. 4]. Most interestingly the differences were statistically significant (p < 0.01) when the rates of CCR in A80 and D80 were compared for all the times assessed [Fig. 5-6-7-8]. It can be concluded that the best results in survival in MG after T are obtained in patients without thymoma and also that the benefits of the rational use of modern therapeutic modalities, including surgery and immunosuppression with drugs, can offer those patients high possibilities of leading completely normal lives.
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Affiliation(s)
- A Rabinstein
- Departamento de Medicina Interna, Hospital Privado, Córdoba
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Abstract
In allergic and irritant contact dermatitis, keratinocytes are major target cells that can be activated to take part in local reactions by secreting soluble mediators. Among the growth factors produced by keratinocytes, vascular endothelial growth factor (VEGF) is a powerful inducer of permeability of endothelial cells, and is involved in inflammation. We determined whether different contact allergens, dinitrosulphobenzene (DNSB), para-phenylenediamine (pPD) and the metals nickel and chromium, as distinct from cobalt, which has been shown to mimic the effects of hypoxia, can modify the basal level of VEGF in normal human keratinocytes when tested at various, non-toxic concentrations. The effects of an irritant, sodium lauryl sulphate (SLS), and of hydrocortisone were also tested. Our results showed an intense dose-dependent upregulation of VEGF release by keratinocytes after treatments by metals, pPD and SLS. DNSB induced only a moderate increase of VEGF. Hydrocortisone reduced the basal level as well as the nickel-induced upregulation of VEGF. These findings suggest that contact allergens and irritants probably upregulate VEGF in keratinocytes by different mechanisms and may contribute directly to the microvascular hyperpermeability which characterizes both contact and irritant dermatitis.
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Affiliation(s)
- S Palacio
- INSERM U346, Clinique Dermatologique, Hôpital Ed Herriot, Lyon, France
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Palacio S, Alioni L, Alioni A, Sferco O. 1-27-01 Neuropsychological profiles of possible simulation patient in conventional and non-conventional scales. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)85012-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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