An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Csaba Tölgyesi; Alida Anna Hábenczyus; András Kelemen; Péter Török; Orsolya Valkó; Balázs Deák; László Erdős; Benedek Tóth; Nándor Csikós; Zoltán Bátori
... The most widespread nature-based solution for mitigating climate change is tree planting. When realized as forest restoration in historically forested biomes, it can efficiently contribute to the sequestration of atmospheric carbon and can also entail significant biodiversity and ecosystem service benefits. Conversely, tree planting in naturally open biomes can have adverse effects, of which water ...
... Soil pollution caused by cadmium (Cd) is a serious concern. Phytoremediation is a popular technology in the remediation of Cd-contaminated soil. Salix matsudana var. matsudana f. umbraculifera Rehd. has been characterized as a high Cd-accumulating and tolerant willow (HCW). Here, transcriptome and proteome profiling, along with morphology analyses were performed to explore molecular cross-talk inv ...
Haloxylon ammodendron; Populus; canopy; carbohydrates; dieback; drought; drought tolerance; environment; field experimentation; leaf water potential; photosynthesis; stomatal conductance; water stress
Abstract:
... In recent year, widespread declines of Populus bolleana Lauche trees (P. bolleana, which dieback from the top down) and Haloxylon ammodendron shrubs (H. ammodendron, which dieback starting from their outer canopy) have occurred. To investigate how both intra-canopy hydraulic changes and plasticity in hydraulic properties create differences in vulnerability between these two species, we conducted a ...
... This study reported that 5-sulfosalicylic acid (5-SSA), a solid acid with hydrotropic properties, could efficiently and rapidly fractionate poplar biomass in an aqueous solution at mild conditions. The experimental results showed that 5-SSA-treatment could deconstruct the biomass recalcitrant intercellular structure and has excellent potential in lignin and hemicellulose dissolution and glucose re ...
... The requirements of solid heterogeneous catalyst are always needed for the synthesis of biodiesel. New environment friendly and cheaper alternatives of solid catalyst are always on demand. Activated charcoal may play a good role in this field and fulfill all criteria of requirement. In this article, we have reported synthesis of cheap charcoal catalyst from wood of poplar tree and sesame. Function ...
... Poplar is one of the most important forest trees because of its high economic value. Thanks to the fast-growing rate, easy vegetative propagation and transformation, and availability of genomic resources, poplar has been considered the model species for forest genetics, genomics, and breeding. Being a field-growing tree, poplar is exposed to environmental threats, including biotic stresses that ar ...
... Climate challenges impose the need for successful afforestation strategies which will increase the amount of carbon sequestered from the atmosphere. In practice, this means evaluation of suitable plant species and management practices for the long-term effects to prove beneficial. In the present study we employed a clasmometric approach to look into biomass partitioning in two tree species, Populu ...
Populus; carbon footprint; cultivars; digital images; finite element analysis; manufacturing; modulus of elasticity; supply chain; tensile strength; wood
Abstract:
... Due to the strong demand for wood, and the need to reduce the carbon footprint in construction, fast-growing low-graded planted species like poplar are promising wood for the supply chain in the context of engineered wood products, EWPs. Finger joints constitute a key technology for the manufacture of long structural elements of EWPs. Thus, evaluation of the mechanical properties of finger joints ...
Arabidopsis; Populus; Salix psammophila; Salix purpurea; bioinformatics; drought; drought tolerance; genes; growth and development; leaf area; phenotype; phylogeny; plant growth; plant stress; salt tolerance; stress tolerance; water stress; China
Abstract:
... The NAC gene family is of great value for plant stress resistance and development. In this study, five NAC genes with a typical NAM domain were isolated from Salix psammophila, which is a stress-resistant willow endemic to western China. Two hundred sixty-two NAC genes from Salix psammophila, Salix purpurea, and Arabidopsis were used to construct the phylogenetic tree to examine the phylogenetic r ...
Populus; case studies; coppicing; decision making; life cycle assessment; supply chain; wood; Austria; Slovakia
Abstract:
... Quantifying the environmental impacts of value chains on the earth’s ecological limits is crucial to designing science-based strategies for environmental sustainability. Combining the Planetary Boundaries (PB) and Life Cycle Assessment (LCA) framework can be used to estimate if a value chain can be considered as Absolute Environmentally Sustainable (AES) in relation to the PB. One of the crucial s ...
... Chrysomela populi is a harmful species in poplar and willows. Therefore, the aim of this study is to contribute to the anatomy and histology of the digestive tract of Coleoptera, including Chrysomelidae. In addition, the results obtained can provide the basis for future work on the development of new strategies for pest control. The digestive tract C. populi consist of three sections: foregut, mid ...
... Fungi of the order Pucciniales are obligate plant biotrophs causing rust diseases. They exhibit a complex life cycle with the production of up to five spore types, infection of two unrelated hosts and an overwintering stage. Transcription factors (TFs) are key regulators of gene expression in eukaryote cells. In order to better understand genetic programs expressed during major transitions of the ...
... Streptococcus mutans (S. mutans) is a common cariogenic bacterium that secretes glucosyltransferases (GTFs) to synthesize extracellular polysaccharides (EPSs) and plays an important role in plaque formation. Propolis essential oil (PEO) is one of the main components of propolis, and its antibacterial activity has been proven. However, little is known about the potential effects of PEO against S. m ...
Jarosław Widelski; Piotr Okińczyc; Emil Paluch; Tomasz Mroczek; Jakub Szperlik; Magdalena Żuk; Zbigniew Sroka; Zuriyadda Sakipova; Ioanna Chinou; Krystyna Skalicka-Woźniak; Anna Malm; Izabela Korona-Głowniak
... There is a noticeable interest in alternative therapies where the outcome is the eradication of the Gram-negative bacterium, Helicobacter pylori (H. pylori), for the purpose of treating many stomach diseases (chronic gastritis and peptic ulcers) and preventing stomach cancer. It is especially urgent because the mentioned pathogen infects over 50% of the world’s population. Recent studies have show ...
Populus; agroforestry; market prices; sustainable development; trees; India
Abstract:
... Poplar is a widely adopted agroforestry tree in North India, especially in the state of Punjab. The present study was undertaken to analyse constraints in adoption of improved poplar based- agroforestry practices in the Ropar district of Punjab and the impact of KVK interventions on knowledge and adoption of improved poplar production technologies. The constraint analysis revealed that the major c ...
... In this study, ash transformation during fixed-bed combustion of different agricultural opportunity fuels was investigated with a special focus on potassium (K) and phosphorus (P). The fuel pellets were combusted in an underfed fixed-bed pellet burner. Residual ashes (bottom ash and slag) and particulate matter were collected and characterized by scanning electron microscopy–energy-dispersive X-ra ...
Acer; Erebidae; Lymantria dispar; Pinus; Populus; Quercus; Salix; adults; case studies; eggs; females; flight; habitats; moths; pests; thorax; China
Abstract:
... The spongy moth (formerly known as a gypsy moth), Lymantria dispar L. (Lepidoptera: Erebidae), is a polyphagous pest that defoliates various species of trees in the genera Populus, Salix, Quercus, Acer and Pinus. Egg masses of Asian spongy moths (Lymantria dispar asiatica) were obtained from five geographically distinct locations in China (Chengdu, Xifeng, Heilongjiang, Kuduer and Longhua regions) ...
... Rising demand for bio-based products exerts a growing pressure on natural resources such as wood. Sustainable solutions are becoming increasingly important to meet the demand. In this study, 20-year poplar Short Rotation Coppice (SRC) plantations located in Western Slovakia are investigated with respect to (socio)-economic, environmental and social sustainability. The cost–benefit methodology is a ...
... Green composite processing technology of wood fibers is an inevitable choice for global sustainable development. In this research, waste poplar powder with different particle sizes was used to prepare glue-free biocomposites with good mechanical and waterproof properties by hot-molding. The biocomposites made of larger size wood powder had better tensile strength (40.3 MPa) and the biocomposites m ...
Raja S. Payyavula; Raghuram Badmi; Sara S. Jawdy; Miguel Rodriguez Jr; Lee Gunter; Robert W. Sykes; Kimberly A. Winkeler; Cassandra M. Collins; William H. Rottmann; Jin‐Gui Chen; Xiaohan Yang; Gerald A Tuskan; Udaya C. Kalluri
... Woody biomass is an important feedstock for biofuel production. Manipulation of wood properties that enable efficient conversion of biomass to biofuel reduces cost of biofuel production. Wood cell wall composition is regulated at several levels that involve expression of transcription factors such as wood‐/secondary cell wall‐associated NAC domains (WND or SND). In Arabidopsis thaliana, SND1 regul ...
... Superhydrophobic aerogels are attractive candidates in controlling oil spills. The major challenges for existing aerogels are the construction of mechanical endurance as well as accessible of building materials. Herein, a newfangled biomass superhydrophobic aerogel (M-PCF/CS) with both superior compressibility and oil caption speed is fabricated by assembling poplar catkin fiber (PCF) hollowed-out ...
Bowen ratio; Populus; afforestation; drought; ecological function; eddy covariance; energy balance; energy transfer; evaporative demand; latent heat flux; plant available water; sensible heat flux; vapor pressure deficit; water management; water use efficiency; China
Abstract:
... During the last decades, the artificial afforestation is expanding in the northern China, understanding their ecological function has been of scientific interest. In this study, we explored how surface energy-balance components vary at seasonal and annual scales, and how biophysical factors control bulk surface parameters and energy exchange over a poplar plantation using the eddy-covariance measu ...
... The mechanical and flame-retardant properties of sodium silicate-impregnated fast-growing poplar have been greatly improved by a wide variety of methods, which has solved the problem of insufficient supply of natural wood to a certain extent. However, sodium silicate is easily leached and has high hygroscopicity, and sodium silicate-modified poplar (SSMP) has low anti-shrink efficiency (ASE), whic ...
... Plantation’s nutrient cycling can regulate and affect the material cycling of ecosystems, which is the key to maintain the sustainable development of the plantation ecosystem. However, the current understanding of the nutrient cycling characteristics of the “leave-root-litter-soil” continuum of dryland plantation ecosystems is limited. Therefore, in the Longzhong Loess Plateau of China, we selecte ...
... Cellulose is the most abundant unique biopolymer in nature with widespread applications in bioenergy and high‐value bioproducts. The large transmembrane‐localized cellulose synthase (CESA) complexes (CSCs) play a pivotal role in the biosynthesis and orientation of the para‐crystalline cellulose microfibrils during secondary cell wall (SCW) deposition. However, the hub CESA subunit with high potent ...
... Litter and root activities may alter the temperature sensitivity (Q₁₀) of soil respiration. However, existing studies have not provided a comprehensive understanding of the effects of litter and root carbon inputs on the Q10 of soil respiration in different seasons. In this study, we used the trench method under in situ conditions to measure the total soil respiration (Rₜₒₜₐₗ), litter-removed soil ...
... This study investigated carbonate pre-treatment of wood followed by densification for producing advanced wood structural materials. Poplar wood blocks of 100 mm long and 20 mm wide with thickness of 10 mm were treated with sodium carbonate with and without sulfide at different carbonate loadings at 150 ºC for 30 min. Carbonate effectively removed lignin and hemicelluloses which facilitated subsequ ...
... Lignocellulosic biomass should not be used as energy feedstock only. The extractable phytochemicals present in lignocellulosic biomass from perennial industrial crops (PIC) can be used in the pharmaceutical, cosmetic and chemical industries. A production residue, so-called “post-extraction biomass”, can be later used as energy feedstock. Therefore, the aim of this study was to assess the thermophy ...
... The ex-situ catalytic co-conversion of poplar pyrolysis vapor and methanol over HZSM-5 was conducted in a bench-scale continuous feeding setup. Methanol was introduced into reaction system through mid-section addition. The effects of catalytic temperature, methanol/poplar mass ratio, time-on-stream on the products distribution and bio-oil composition were investigated. In addition, the evident syn ...
... More than 40 million tons of thermosetting plastics are produced annually and 70% of those are epoxy polymers. The synthesis of bio-based epoxide provides a pathway for making renewable thermoset plastics. We describe in this study the use of a genetically modified high-S poplar lignin to produce 4-propyl-2,6-dimethoxyphenol (DMPP), which is converted to the tri-functional compound propylpyrogallo ...
... Although the preparation of bio-oil with hydrothermal liquefaction shows the potential for sustainable development, both the, yield and quality were low which greatly hindered its application. Hence, a novel approach was proposed herein to improve the yield and quality of bio-oil. The production of bio-oil from poplar sawdust under direct/stepwise hydrothermal liquefaction (HTL) with Na₂CO₃ or Na₂ ...
... The carbonyl platform compound from the catalytic pyrolysis of holocellulose was employed for the integrated aldol condensation and hydrogenation to produce hydrocarbons in the range of jet fuel. By the carbonylation of the pyrolysis vapor from holocellulose prepared from rape straw, bagasse and poplar (RS-Holo, BG-Holo and PL-Holo), it was revealed that BG-Holo rich in cellulose as the raw materi ...
... Changes in the soil ecological microenvironment of coal gangue contaminated areas were evaluated after 10 years of in situ restoration with Artemisia sacrorum, Imperata cylindrica, and Populus spp. The changes in soil enzyme activity, ion spectrum, bacterial community structure and function, and metabolic spectrum were analyzed in an unrestored coal gangue pollution area (Control), an Artemisia sa ...
... Humans influence desert ecosystem structure and function by transforming native vegetation into agricultural and non‐agricultural land. However, how different land uses in desert grasslands affect soil phosphorus (P) fractions with varying lability by creating distinct soil physicochemical and microbial properties remains poorly understood. To address this question, a field study was conducted in ...
... In this work, poplar wood chips (PWCs) were subjected to autohydrolysis pretreatment with different levels of intensity, and the autohydrolyzed PWCs were used to make chemi-thermomechanical pulp (CTMP). The changes of the lignin structure of PWCs and the bleachability of the CTMP with autohydrolyzed PWCs as raw materials were both investigated. The results showed that the lignin structure changed ...
... Glyceraldehyde-3-phosphate dehydrogenase (GAPDH), an essential enzyme of the glycolysis metabolic pathway, plays a vital role in carbon metabolism, plant development, and stress resistance. As a kind of woody plant, poplars are widely cultivated for afforestation. Although the whole genome data of poplars have been published, little information is known about the GAPDH family of genes in poplar. T ...
Arabidopsis thaliana; Betula pendula subsp. mandshurica; Populus; Zea mays; gene expression; introns; phloem; prediction; protein kinases; salt stress
Abstract:
... The CBL-interacting protein kinases’ (CIPKs) gene family plays an important role in plants under salt stress. In this study, a total of 31 PtrCIPK genes were identified in poplar. CIPKs’ gene family was divided into two categories, few intron classes and multi-intron classes. They all have the core components of the kinase domain and regulatory domain unique to the CIPK gene family and share most ...
... High-energy radiation preferentially degrades cellulose and enriches lignin content at wood surfaces particularly in hardwoods. Accordingly, we hypothesize that a similar effect will occur at surfaces exposed to plasma. We test this hypothesis by plasma-treating pine and poplar veneers and assessing changes in the lignin and holocellulose-derived sugar-content of veneers; quantifying etching of pe ...
... Black locust (Robinia pseudoacacia L.), beech (Fagus sylvatica L.), poplar (Populus x euramericana cv. pannonia) and spruce (Picea abies Karst.) wood samples were treated in saturated steam at 100, 110 and 120 °C for 2 days. Steamed and unsteamed (control) specimens were irradiated using a UV emitter mercury lamp in order to determine the chemical changes generated by UV irradiation. The main goal ...
Osmany Cuesta-Rubio; Ingrid Márquez Hernández; Mercedes Campo Fernández; Irán Rodríguez-Delgado; Rodny Montes De Oca Porto; Anna Lisa Piccinelli; Rita Celano; Luca Rastrelli
... The chemical composition and the antioxidant potential of Ecuadorian propolis samples (n = 19) collected in different provinces were investigated. HPLC-DAD-ESI/MSⁿ and GC-EI-MS analysis of the methanol extracts enabled us to define six types of Ecuadorian propolis based on their secondary metabolite composition. 68 compounds were identified, 59 of which are reported for the first time in Ecuadoria ...
... The recent climate change scenarios show significant increases in temperature and extreme drought events in Southern and Eastern Europe by the end of the 21st century, which will have a serious impact on forest growth and adaptation, and important consequences for forest management. The system of provenance regions, according to the OECD Scheme and EU Directive, was thought to encourage the use of ...
... Experimental evidences in support of climate warming–driven phenological shifts are still scarce, particularly from the developing world. Here, we investigated the effect of experimental warming on flowering phenology of selected woody plants in Kashmir Himalaya. We selected the twigs of four congeneric pairs of temperate woody species (Prunus, Populus, Ulmus, Viburnum)—typical spring-flowering pl ...
Populus; abiotic stress; berberine; biosynthesis; chitinase; financial economics; flavonols; gene expression regulation; genetically modified organisms; insect resistance; non-specific serine/threonine protein kinase; peroxidase; promoter regions; salt tolerance; terpenoids; transcriptomics; trees; China
Abstract:
... Poplar is an important greening and economic tree species in China while damage caused by diseases and herbivorous insects seriously restricts its widespread planting. WRKYs play an important role in the response to biotic and abiotic stresses, but the defense mechanisms induced by poplar WRKY to protect the trees from herbivorous insects remain unclear. In this study, PeWRKY41 was cloned and its ...
... R2R3-MYB protein is the most abundant class of MYB transcription factor family in plants. The transcript profiles of two E4 races of Melampsora larici-populina-tolerant poplars and an intolerant poplar were investigated to characterise the role of the R2R3-MYB family genes in the poplar–E4 interaction. In this study, 217 R2R3-MYBs were identified, and 83 R2R3-MYB genes were assigned to 22 differen ...
... Efficient production of xylooligosaccharides (XOS) from lignocellulosic biomass without preliminary xylan isolation is challenging. Previously, organic acid has been used to produce XOS from lignocelluloses without xylan isolation. However, the knowledge about XOS production from the residual xylan in acid-hydrolyzed lignocelluloses is still unclear. In this study, acetic acid (AC) hydrolysis of p ...
... The cultivation of Populus spp. on acid soils is difficult mainly due to low nutrient availability, limiting the distribution and use of this marketable tree species. In this paper we report the results of two experiments, in which a granulated highly reactive micronized calcium carbonate (CaCO₃) was tested at increasing levels to improve the effect of NPKS fertilization on poplar growth. Twin fie ...
... According to recent literature, delignification could be a new approach to enhance mechanical properties of densified wood. In the present study, the effect of delignification and polymerization, on the physical properties and chemical structure of densified poplar wood was investigated. Wood blocks were delignified with glycerol, in order to keep the hemicelluloses, as an important component in h ...
... It has been widely accepted that biochar has a great potential of mitigating soil nitrous oxide (N₂O) emission. However, the underlying mechanism about how biochar affects nitrogen transformation and the pathways of soil N₂O production is under discussion. A ¹⁵N-tracer incubation experiment was conducted to investigate the short-term effects of biochar on soil N transformation rates and source par ...
Populus; furfuryl alcohol; hydrophobicity; modulus of rupture; sorption; sustainable development; water uptake; wettability; wood; wood industry
Abstract:
... Upgrading low-quality wood with less consumption of modifier is demanded in sustainable development of wood industry. In this study, multi-interfacial furfurylation combined with densification was proposed to improve performances of wood. Different from traditional furfurylation, the multi-interfacial furfurylation comprised internal impregnation with 10% concentration furfuryl alcohol (FA) and su ...
Populus; bioadhesives; biphenyl; chitosan; comparative study; environment; modulus of elasticity; modulus of rupture; plywood; shear strength; temperature; urea formaldehyde; water uptake
Abstract:
... This study aims to make environment-friendly plywood panels acceptable in terms of both mechanical and physical properties using chitosan as a natural binder. Five-layer poplar plywood specimens were prepared with two different commercial adhesives, namely urea-formaldehyde (UF) and methylene diphenyl isocyanate (MDI), and compared with chitosan (CH). For evaluation, mechanical properties such as ...
... Short rotation woody crops (SRWCs) can be a sustainable solution for producing biomass for bioenergy and, at the same time, mitigating CO₂ emissions. Although the contribution SRWCs can give to the transition to a low-carbon energy economy, farmers are hesitant to introduce them, as they have a low added value and there are uncertain economic prospects for cultivating SRWCs. Therefore, this study ...
... Regarding mechanics, wood is one of the most efficient materials available. Due to its unique combination of composite and cellular microstructure, it exhibits superb specific mechanical properties which exceed many man-made materials. However, concerning absolute mechanical properties, wood is often inferior to metals and novel engineered composites. Since many wood properties are strongly correl ...
... Previously, lactic acid (LA) hydrolysis has been applied in xylo-oligosaccharides (XOS) production from poplar. However, the impact of the pH value of LA on the production of XOS was unclear. In this study, the delignified poplar was prepared by hydrogen peroxide-acetic acid pretreatment of poplar, and lignin removal reached 84.1%. LA with different pH values (2.0–5.0) was applied in XOS and monos ...
... In this work, effects of sulfomethylated lignins (SLs) prepared from masson pine (SLM) and poplar (SLP) on enzymatic hydrolysis and cellulase-lignin interaction were comparatively investigated. The results showed that both SLM and SLP significantly promoted the substrate enzymatic digestibility. The total sugar yield increased from 38.6% to 74.4% and ∼ 100%, respectively at 10 FPU/g-cellulose of c ...
... Tree strips on agricultural production sites offer many economic, ecological and social advantages. However, the introduction of trees creates a transition zone between tree strips and crop land. Here, trees and crop plants compete for resources such as space, nutrients, water and light, which causes stress in the low‐competitive system. On the other hand, facilitation such as additional nutrient ...
... BACKGROUND: The V-myb myeloblastosis viral oncogene homolog (MYB) family of proteins is large, containing functionally diverse transcription factors. However, MYBs in Morus are still poorly annotated and a comprehensive functional analysis of these transcription factors is lacking. RESULTS: In the present study, a genome-wide identification of MYBs in Morus alba was performed. In total 166 MaMYBs ...
... Branching angle is a critical factor that determines the morphological establishment and is a typical quantitative trait controlled by multiple genes. In this study, we used SLAF-seq to construct a high-density genetic map, to investigate the genetic architecture of branching angle in poplar (Populus leucopyramidalis). A total of 240,672 SLAF tags were obtained, including 103,691 polymorphic SLAF ...
... KEY MESSAGE: Construction of ML-hGRN for the salt pathway in Populus davidiana × P. bolleana. Construction of ML-hGRN for the lignocellulosic pathway in Populus davidiana × P. bolleana under salt stress. Many woody plants, including Populus davidiana × P. bolleana, have made great contributions to human production and life. High salt is one of the main environmental factors that restricts the grow ...
... Rhizosphere microorganisms can affect the nutrient uptake of plant roots, and therefore contribute significantly to plant growth and nutrient cycling in forest ecosystems. Our previous studies revealed that the application of biogas slurry, an available organic fertilizer, increased the signal intensity and diversity of functional microbial genes in bulk soil. Further study of the response of rhiz ...
... Coupling of biochar along with microbial inoculants could increase the phosphorus (P) availability and efficiency under the P-deficient environment. However, the effects of biochar and microbes on soil P retention remain still unconcerned in the subtropical environment. In the present study, AMF Glomus mosseae and Bacillus J 119 were applied as microbial material into two texturally different soil ...
... Lignin is a highly complex phenolic polymer which is essential for plants, but also makes it difficult for industrial processing. Engineering lignin by introducing relatively labile linkages into the lignin backbone can render it more amenable to chemical depolymerization. It has been reported that introducing a feruloyl-coenzyme A monolignol transferase from Angelica sinensis (AsFMT) into poplar ...
... Unlike herbaceous plants, woody plants undergo volumetric growth (a.k.a. secondary growth) through wood formation, during which the secondary xylem (i.e., wood) differentiates from the vascular cambium. Wood is the most abundant biomass on Earth and, by absorbing atmospheric carbon dioxide, functions as one of the largest carbon sinks. As a sustainable and eco-friendly energy source, lignocellulos ...
... Plantation forestry has a long history in Europe and still supports local industry, generating employment, improving environmental quality, and mitigating climate change. As part of these plantations, medium-rotation poplars (5–8 years) provide good quality logs for fiber production, and the branches and tops can be converted into green energy. Finding a cost-effective harvesting system for this p ...
... Green and low cost deep eutectic solvents (DESs) are promising to replace the solid acids and ionic liquids in biomass fractionation process. To enhance the lignocellulose pretreatment efficiency, an acidic DES that composed of Brønsted acid (ZnCl₂) as hydrogen bond acceptor and Lewis acid (lactic acid) as hydrogen bond donator was designed. This bifunctional DES was used for the extraction of lig ...
... Reclamation changes the ecological processes and environmental conditions in coastal wetlands, and greatly affects the biogeochemical cycling of the ecosystem. However, how afforestation influences C, N, and P stoichiometry in plant–soil systems with reclamation time remains unclear. We studied the variations in C, N, and P concentrations and stoichiometries in different poplar compartments (leave ...
... Chlorinated ethene (CE) contaminants are widespread in groundwater, and the occurrence of vinyl chloride (VC), among others, is a well-known issue due to its mobility, persistence, and carcinogenicity. Human exposure to VC may occur through inhalation after soil vapor intrusion into buildings at sites with shallow underground contamination. Soil vapor intrusion risk is traditionally assessed throu ...
Jean Sanger Siqueira; Cleide Samara Tavares Mescouto; Michelle de Souza Lemos; João Batista Pereira Junior; Giorgio C. Venturieri; Heronides Adonias Dantas Filho; Kelly das Graças Fernandes Dantas
Populus; apiculture; atomic absorption spectrometry; databases; geopropolis; hydrofluoric acid; hydrogen peroxide; microwave ovens; mineral content; nitric acid; principal component analysis; reference standards; research; Amazonia; Brazil
Abstract:
... Information on the mineral composition of geopropolis produced by bees native to the Amazon region is of great importance for the chemical characterization of this product. This study aimed to determine the Ca, Cu, Fe, K, Mg, Mn, P, and Zn contents in 22 samples of geopropolis from northern Brazil by inductively coupled plasma optical emission spectrometry (ICP OES). Geopropolis samples were diges ...
Internet; Populus; environmental quality; human health; models; phenology; photogrammetry; spatial data; surveys; trees; urban areas; vegetation; China
Abstract:
... Poplar and willow catkins (PWCs) have caused severe impacts on human health and environmental quality, and accurate poplars and willows (PaWs) mapping with remote sensing is essential to monitor and manage the PWCs. However, two major issues have constrained the urban tree species (e.g. PaWs) identification: (1) the urban tree landscapes are highly fragmented and susceptible to the existence of mi ...
... In this study, two poplar varieties with different resistance to sulfur dioxide were selected for a comparative experiment. SO₂ fumigation to the poplars was carried out under controlled conditions to determine the variation in the activity of enzymes, the content of metabolites and the expression of enzymes genes in pathways of sulfur metabolism in plants. The results showed that the activity of ...
Eucalyptus; Fourier transform infrared spectroscopy; Populus; cellulose acetate; chemical composition; crosslinking; electrical conductivity; gel chromatography; lignin; nanofibers; nuclear magnetic resonance spectroscopy; rheology; surface tension; thermal analysis; viscosity
Abstract:
... This work focuses on the structural features and physicochemical properties of different Kraft lignins and how they can influence the electrospinning process to obtain nanostructures. Structural features of Kraft lignins were characterized by nuclear magnetic resonance, size exclusion chromatography, fourier-transform infrared spectroscopy, and thermal analysis, whereas chemical composition was an ...
... Prospero Alpini was an Italian physician, botanist and scientist. Born in Marostica, in the Republic of Venice, in his youth he served in the Milanese army, but in 1574 he decided to study medicine at the University of Padova, where he graduated in 1578. After a short period as a doctor in Camposampiero (Padova, Italy), he became the personal doctor of Giorgio Emo, the appointed consul in Cairo in ...
Erysiphe; Populus; Salix gracilistyla; Uncinula; cryptic species; internal transcribed spacers; new species; phylogeny; powdery mildew; South Korea
Abstract:
... Recently performed phylogenetic-taxonomic analyses of species belonging to Erysiphe sect. Uncinula on willows (Salix spp.) demonstrated a much higher diversity than previously assumed. Phylogenetic analyses and morphological examinations of Chinese Erysiphe collections on Salix abscondita (= S. raddeana), S. sinica and S. taraikensis, all belonging to Salix subgen. Vetrix sect. Vetrix, revealed an ...
Populus; Sphingomonas; bacterial communities; community structure; forest soils; organic matter; perennials; rhizosphere; soil fertility; species diversity
Abstract:
... BACKGROUND AND AIMS: Organic matter addition is an important management practice for maintaining soil fertility and the sustainability of artificial ecosystems. However, the effects of different types of organic matter on the microbial community in the perennial plant rhizosphere are not well understood. METHODS: A pot experiment was conducted to study how soil type and organic inputs influence ba ...
... Brown rot fungi dominate the carbon degradation of northern terrestrial conifers. These fungi adapted unique genetic inventories to degrade lignocellulose and to rapidly release a large quantity of carbohydrates for fungal catabolism. We know that brown rot involves “two-step” gene regulation to delay most hydrolytic enzyme expression until after harsh oxidative pretreatments. This implies the cru ...
Populus; active sites; enzymes; evolution; site-directed mutagenesis
Abstract:
... Elucidating the mechanisms of function differentiation of duplicate genes in large enzyme families is critical to understand the molecular evolution of important plant enzymes. By biochemical activity assays and site‐directed mutagenesis, this study revealed the contributions of active site motifs to the functional divergence of duplicate genes. ...
... Absract—Phylogenetic analysis of the internal transcribed spacer (ITS) of ribosomal DNA isolated from 51 basidiocarps of tinder fungus shows that this xylotrophic fungus in the Urals and North Kazakhstan is a complex species consisting of two cryptic phylogenetic lineages (A and B) represented by sublineages A2 and B2. Their natural habitats overlap and encompass the South, Middle and North Urals, ...
... Drought stress poses adverse influence on plant growth and further alters plant-herbivore interactions. Such effect is enhanced as drought occurrence is reported to increase due to global warming. Although dioecious plant species have shown sex-specific response to drought stress through the changes in growth performance and stress tolerance, whether such changes will drive sex-specific difference ...
... The safety of genetically modified forest trees is an important ecological issue worldwide, and concerns about genetic modification are one factor hindering in-depth research and large-scale planting of genetically modified trees. This study evaluated the impact of transgenic poplars on the ecosystem by analyzing differences in arthropod communities, target arthropods, and nontarget arthropods in ...
Populus; ecology; evapotranspiration; forests; grasslands; rain; sand; shrubs; soil erosion; water requirement; water shortages; water stress; wind; China
Abstract:
... In order to construct stable vegetation for reducing wind and sand disasters and soil erosion in the Bashang Area of Northwest Hebei Province in China, it is very important to understand the ecological water demand of different vegetation types in this area. Based on observed data and the Irmak-Allen formula, we investigated the ecological water demand and ecological water shortage of arbor, shrub ...
... Secondary cell wall (SCW) formation is regulated by a multilevel transcriptional regulatory network, in which MYB transcription factors (TFs) play key roles. In woody plants, hundreds of MYB TFs have been identified, most of which have unknown functions in wood SCW biosynthesis. Here, we characterized the function of a Populus MYB gene, PtoMYB10. PtoMYB10 was found to encode an R2R3-MYB TF and exh ...
... Furfurylation with a low concentration of furfuryl alcohol (FA) promotes the improvement of the properties and the effectiveness of FA on cell–wall action without darkening the furfurylated wood to the point that it affects its applications. In this paper, the effects of furfurylation on the hygroscopicity and water uptake dimensional stability of poplar (Populus sp.) and Chinese fir (Cunninghamia ...
... This study evaluates the potential of a mixed fast and slow pyrolysis process for the conversion of four feedstocks (i.e., hybrid poplar, maple, pine, and sugarcane bagasse) into bio-oil and biochar. The novelty of this study lies within the integration of a free-fall reactor with a batch reactor to take advantage of both fast and slow pyrolysis, and adapt conversion parameters (e.g., carrier gas ...
Fagus; Picea; Populus; chemical composition; chromatography; color; colorimetry; hydrolysis; infrared spectroscopy; modulus of elasticity; modulus of rupture; permeability; shrinkage; steam; wood
Abstract:
... The effect of steam explosion treatment (SE) on the appearance and water permeability of solid beech, poplar, and spruce wood was investigated. Wooden test specimens were steam blasted after water or acid impregnation at 10 ~ 16 bar for 5 ~ 15 min, and their chemical composition was determined by chromatographic analysis after hydrolysis and infrared spectroscopy. Macro/micro cracks with shrinkage ...
... This study aimed to investigate the relationship between the properties of pore size distribution and water sorption in melamine-urea-formaldehyde (MUF) resin-impregnated wood by scanning electron microscopy (SEM), nitrogen adsorption (NAD) measurement, mercury intrusion porosimetry (MIP), water-soaking, and moisture adsorption over saturated salt solutions. The results showed that MUF resin not o ...
Populus; color; dimensional stability; microstructure; modulus of elasticity; modulus of rupture; steam; technology; wood
Abstract:
... To improve the undesirable properties of fast-growing wood, an environmentally friendly modification technology that combined controllable densification and superheated steam treatment was used to process fast-growing wood into a sandwich-densified structural material. The effects of the position of the densified layer(s) and superheated steam pressure on the density, microstructure, color, dimens ...
... Binderless poplar/bismuth oxide wood alloy is prepared using the warm-press forming technology. The effect of the forming temperatures on color changes and mechanical properties of the poplar/bismuth oxide wood alloy is studied. The results show that the surface color of the specimen gradually darkened as the forming temperature increased. There is the most obvious change from 140 to 160 °C. The C ...
... The poplar and willow weevil, Cryptorhynchus lapathi L., a major universally destructive wood-boring insect has become one of the important quarantine pests that is extremely destructive to forestry development and needs to be controlled. Entomopathogenic fungi (EPF) are considered safe and friendly for humans and the environment and play important roles in controlling insect pest populations. In ...
... The acid formed by thermal degradation of wood can autocatalyze its heat treatment. In this study, exogenous acid was introduced by impregnation into poplar wood to investigate its effect on the physical and mechanical properties of wood. Equilibrium moisture content (EMC), dimensional stability, mass loss (ML), color, modulus of rupture (MOR), and modulus of elasticity (MOE) of heat-treated popla ...
... The pretreatment of lignocellulosic biomass is important for efficient bioethanol conversion, but causes undesirable by-products that inhibit microbial growth, conversely affecting the bioconversion efficiency. In this study, the main inhibitors derived from dilute phosphoric acid plus steam-exploded poplar wood were identified as 0.22 g/L furfural, 3.63 g/L acetic acid, 0.08 g/L syringaldehyde, e ...
Populus; anisotropy; chemical structure; energy conservation; graphene; liquids; microwave treatment; porosity; thermal conductivity; wood
Abstract:
... The combination of natural wood and graphene can provide a new type of material with excellent mechanical properties and thermal conductivity. However, it is difficult for graphene to uniformly penetrate the wood due to the anisotropy of natural wood and the agglomeration of graphene. In this work, poplar veneer was treated with low-energy-density microwave to expand the entry pathways for the gra ...
Populus; absorption; algorithms; equations; temperature; water content; wood
Abstract:
... Herein, the coupling interactions between moisture and temperature on the microwave absorption of poplar were investigated quantitatively under microwave heating at 2450 MHz. The inverse physics problems have been solved based on the microwave heating curve of poplar wood by a genetic algorithm approach. Meanwhile, the quantitative characterization equation of the microwave absorption power of pop ...
... The main objective of this study was to compare the effects of two densities (278 stems·ha⁻¹ with two spacings of 6 m × 6 m or 4.5 m × 8 m, 400 stems·ha⁻¹ with two spacings of 5 m × 5 m or 3 m × 8 m) and three poplar clones (NL95, NL895, and NL797) on productivity and carbon (C) sequestration of poplar ecosystems. The results showed that planting density significantly affected the biomass of a sin ...
... Ground-level ozone (O₃) is a secondary air pollutant and affects the roots and soil processes of trees. Therefore, O₃ can affect the uptake and allocation of nutrients in trees, which merits further clarification. A fumigation experiment with five O₃ levels was conducted in 15 open top chambers for two poplar clones, and the concentrations of six macronutrients (N, P, K, S, Ca, Mg) in different or ...
... L-Glutamine (Gln) is a proteinogenic amino acid, N transporter and NH₃ carrier, engaging in diversified pathways for synthesizing many important molecules. However, the effects of exogenous Gln on plant growth and development remain largely unknown. In this study, different concentrations of Gln were supplemented in the poplar hybrid ‘Nanlin895’ culture medium as a sole N source. Their effects on ...
... Laser surface modification is a method that uses a laser beam to irradiate the workpiece surface to change its structure and chemical components, so as to change the physical and chemical properties of the material surface. In this study, the CO₂ laser was applied to modify poplar plywood. The mass loss per unit area and paint film properties (color, glossiness and adhesion) were tested and measur ...
Populus; administrative management; biomass; carbon; climate change; coasts; drought; equations; field experimentation; fine roots; forests; soil profiles; soil water content; spatial distribution; stand age; total nitrogen; understory; water uptake; China
Abstract:
... Although we know that fine roots play an important role in carbon and nutrient cycling in forest ecosystems, knowledge on how fine root biomass (FRB) and its vertical distribution change with stand age and inter-annual precipitation variability is limited. In this study, we conducted a field experiment to explore the effects of stand age and inter-annual precipitation variability on FRB and its ve ...
... To improve the dispersion of graphene oxide particles in wood for better thermal conductivity, this paper proposes the feasibility of obtaining graphene oxide with a smaller particle size using ball milling and its application in melamine resin-modified poplar veneer. The median diameter of multilayer graphene oxide was measured to learn the effects of different ball milling conditions on the part ...
... Novel and green cholinium amino acids-based deep eutectic solvents (DESs) and their aqueous mixtures were synthesized and employed in deconstructing poplar for hemicellulose fractionation. The effects of water content in DESs on hemicellulose dissociation and structural features were comprehensively investigated, along with the reusability of DESs for treatment. The integration of water into DESs ...
... Herein, acidic concentrated lithium bromide-water system was efficiently carried out to synthesize levulinic acid (LA) from raw lignocellulose by two-step treatment. Saccharification was processed in 1st step, and 80.96 wt% glucose and 85.60 wt% xylose were yielded based on their theoretical yield from poplar at 110 °C for 20 min. The hydrolysate after solid residual lignin (SRL) separation was co ...
... Drought is the main abiotic stress that negatively affects the crop yield. Due to the rapid climate change, actual plant defence mechanisms may be less effective against increased drought stress and other related or co-occurring abiotic stresses such as salt and high temperature. Thus, genetic engineering approaches may be an important tool for improving drought tolerance in crops. This mini-revie ...