Explore the vast range of titles available.

Rhus typhina L., an exotic plant that is widely distributed in China, is harmful to native ecosystems; however, little is known about its effects on soil microbial communities. Therefore, we investigated the effects of R. typhina on soil bacterial communities by 16S rRNA gene sequencing and compared the effects of R. typhina and native (Rhus chinensis Mill.) and non-invasive exotic species (Amorpha fruticosa L. and Robinia pseudoacacia L.) on soil bacterial communities via a greenhouse experiment. R. typhina decreased the diversity of the soil bacterial community compared with R. chinensis, and A. fruticosa. R. typhina soil was characterized by more Actinobacteria and lesser Proteobacteria and Acidobacteria than the other soils. Among Actinobacteria members, there was a difference in the relative abundance of Nocardioides and Streptomyces, and this could be advantageous for the growth of R. typhina. However, there was no significant difference in the soil bacterial community structure associated with R. typhina and other species. Moreover, the concentrations of total carbon, potassium, and nitrate were found to be the major soil factors influencing the relative abundance of soil bacteria.

The present investigation reports the chemical composition of the Rhus typhina L. stem identified via mass spectrometry and NMR as gallic acid, 1-O-galloyl-β-D-glucose, tryptophan, scopolin, methyl gallate, fustin, quercetin, rutin, and 1,2,3,4,6-penta-O-galloyl-β-D-glucose. The antioxidant properties and the chemical composition contents of the R. typhina L. stem grown in different regions in China were determined. To determine the antioxidant activity, a total phenolic content analysis, 2, 2-diphenyl-1-picrylhydrazyl radical scavenging activity assay, ferric reducing antioxidant power assay, and β-carotene linoleic acid model system were conducted. The results showed that the Rhus typhina L. stem possessed high antioxidant capacities due to its high phenolic content. The contents of the nine isolated compounds were determined by UPLC-ESI-MS/MS. The calibration curves of the nine isolated compounds were linear within the concentration range and the average recoveries were high. The result showed that 1-O-galloyl-β-D-glucose, gallic acid, methyl gallate, and 1,2,3,4,6-penta-O-galloyl-β-D-glucose could be the compounds mainly responsible for the antioxidant capacity of the R. typhina L. stem. This reveals that the R. typhina L. stem is a good source of antioxidants.

This study evaluates the corrosion-inhibiting effects of the methanolic (P1) and the hydroalcoholic (P2) extracts of the Rhus typhina L. leaves on carbon steel (OL37) in 1 M HCl. Extracts were prepared with microwave-assisted extraction and characterized using HPLC and LC-MS. Electrochemical methods (OCP, EIS, PDP) and surface analyses (SEM, EDX) assessed the performance of both extracts. The results showed that the P1 and P2 extracts significantly reduced corrosion rates by forming protective layers on the metal surface, with inhibition efficiencies exceeding 90%, at 1000 ppm concentration, for P1 (93%), for P2 at 800 ppm (91%) and 1000 ppm (94%). The P2 extract demonstrated superior long-term performance, maintaining protection after 96 h of immersion. The extracts function as mixed-type inhibitors, affecting both anodic and cathodic reactions, with physicochemical adsorption demonstrated by the Langmuir isotherm. Overall, the Rhus typhina leaf extracts, particularly the P2 extract, offer a promising, eco-friendly approach to corrosion prevention in acidic environments.

Background High-quality RNA extraction from woody plants is difficult because of the presence of polysaccharides and polyphenolics that bind or co-precipitate with the RNA. The CTAB (cetyl trimethylammonium bromide) based method is widely used for the isolation of nucleic acids from polysaccharide-rich plants. Despite the widespread use of the CTAB method, it is necessary to adapt it to particular plant species, tissues and organs. Here we described a simple and generalized method for RNA isolation from mature leaf tissues of several economically important woody (17) and herbaceous plants (2) rich in secondary metabolites. High yields were achieved from small amount (up to 50 mg) of plant material. Two main modifications were applied to the basic protocol: an increase in β-mercaptoethanol concentration (to 10%v/v) and the use of an effective DNase treatment. As opposed to similar studies, we tried to describe a more detailed protocol for isolating RNA, including the exact quantity and concentration of the reagents were used. Results Our modified CTAB method is proved to be efficient in extracting the total RNA from a broad range of woody and herbaceous species. The RNA yield was ranged from 2.37 to 91.33 µg/µl. The A 260 :A 280 and A 260 :A 230 absorbance ratios were measured from 1.77 to 2.13 and from 1.81 to 2.22. The RIN value (RNA Integrity Number) of the samples fell between 7.1 and 8.1, which indicated that a small degree of RNA degradation occurred during extraction. The presence of a single peak in the melt curve analyses and low standard errors of the Ct values of replicated measurements indicated the specificity of the primers to bind to the cDNA. Conclusions Our RNA isolation method, with fine-tuned and detailed instructions, can produce high quality RNA from a small amount of starting plant material that is suitable for use in downstream transcriptional analyses. The use of an increased concentration of the reducing agent β-mercaptoethanol in the extraction buffer, as well as the application of DNaseI-treatment resulted in a method suitable for a wide range of plants without the need of further optimalization, especially in Rhus typhina (Staghorn sumac), for which molecular-genetic studies have not yet been sufficiently explored.

It is well known that accumulation of advanced glycation ends products (AGEs) lead to various diseases such as diabetes and diabetic complications. In this study we showed that hydrolysable tannin from Sumac ( Rhus typhina L.)—3,6-bis- O -di- O -galloyl-1,2,4-tri- O -galloyl-β- d -glucose (C 55 H 40 O 34 ) inhibited generation of glycation markers in bovine serum albumin such as AGEs, dityrosine, N ′-formylkynurenine and kynurenine under high glucose treatment. This effect was accompanied by stabilization of the protein structure, as was shown using ATR-FT-IR spectroscopy and fluorescence methods. C 55 H 40 O 34 exhibited also a neuroprotective effect in high glucose-exposed Neuro2A cells suppressing ROS formation and expression of phospho NF-κβ and iNOS. At the same time C 55 H 40 O 34 increased expression of heme oxygenase-1 and NAD(P)H: quinone oxidoreductase and mitochondrial complex I and V activities. Results from this study demonstrates a potent antiglycation activity of C 55 H 40 O 34 in vitro and indicates its possible therapeutic application in glycation related diseases. Graphical abstract

Aims Soil legacies mediate interactions between native and introduced plants, contributing to both invasion and biotic resistance to invasion. Given that nitrogen deposition can promote allelochemical release, reduce the benefits of soil microbes, and affect trait plasticity, nitrogen deposition likely alters soil legacies as well. However, it is not clear how mechanisms that facilitate adaptation to soil legacies are altered by nitrogen deposition. Methods In a greenhouse setting, we investigated how an invasive and a native plant in northern China ( Rhus typhina and Ailanthus altissima , respectively) acclimate to soil legacies and how these dynamics change with nitrogen availability. We measured plant functional traits, soil microbial abundance, microbial enzyme activities, and soil allelopathic effects to characterize plant responses to soil legacies from plants of the same and of the other species. Results Rhus typhina had a stronger growth response to soil legacies than did A. altissima . Rhus typhina established a novel plant-soil feedback by increasing fungi and bacteria, changing the composition of the microbial community, and effectively transforming negative effects of soil allelopathy to positive effects. Nitrogen deposition promoted the growth of R. typhina and alleviated the negative effects of heterospecific soil legacies on the performance of R. typhina . Conclusions Invasive plants can acclimate to the soil legacies of native species through a combination of high trait plasticity, manipulating soil microbes, and establishing novel plant-soil feedbacks. Nitrogen deposition can facilitate invasive species acclimating to soil legacies by monopolizing nitrogen absorption, though this may diminish the benefit of soil microbes.

Pollinators face many stressors, including reduced floral diversity. A low-diversity diet can impair organisms’ ability to cope with additional stressors, such as pathogens, by altering the gut microbiome and/or immune function, but these effects are understudied for most pollinators. We investigated the impact of pollen diet diversity on two ecologically and economically important generalist pollinators, the social bumble bee ( Bombus impatiens ) and the solitary alfalfa leafcutter bee ( Megachile rotundata ). We experimentally tested the effect of one-, two-, or three-species pollen diets on gut bacterial communities in both species, and the melanization immune response in B. impatiens . Pollen diets included dandelion ( Taraxacum officinale ), staghorn sumac ( Rhus typhina ), and hawthorn ( Crataegus sp.) alone, each pair-wise combination, or a mix of all three species. We fed bees their diet for 7 days and then dissected out guts and sequenced 16S rRNA gene amplicons to characterize gut bacterial communities. To assess melanization in B. impatiens , we inserted microfilament implants into the bee abdomen and measured melanin deposition on the implant. We found that pollen diet did not influence gut bacterial communities in M. rotundata. In B. impatiens , pollen diet composition, but not diversity, affected gut bacterial richness in older, but not newly-emerged bees. Pollen diet did not affect the melanization response in B. impatiens . Our results suggest that even a monofloral, low-quality pollen diet such as dandelion can support diverse gut bacterial communities in captive-reared adults of these bee species. These findings shed light on the effects of reduced diet diversity on bee health.

Aims Environmental heterogeneity can influence biological invasions by altering the interspecific competition between native and invasive species. Soils are a key component of the abiotic environment that can vary in small scales. However, it is not clear how the mechanisms that patch size of soil heterogeneity mediates competition between native and invasive plants. Methods We grew invasive Rhus typhina and native Rhus chinensis in intraspecific (two seedlings of the same species per pot) and interspecific competition (one seedling of each of the two species per pot) with three different soil treatments: homogeneous (Ho) and two soil heterogeneous (He1 and He2) treatments. In He1 and He2 treatments, the soil consisted of loam and peat patches but different patch sizes, and in Ho treatment, the soil was a uniform mixture of the two types of soil patches. Results We found R. typhina had greater overall performance and belowground investment compared to R. chinensis and outcompeted R. chinensis in the interspecific competition regardless of soil heterogeneity. The strength of interspecific competition increased with increasing soil heterogeneity, such that soil heterogeneity amplified the superiority of R. typhina over R. chinensis . Moreover, R. chinensis were more plastic in phenotype than R. typhina , indicating phenotypic plasticity did not confer advantages to R. typhina over R. chinensis across various soil heterogeneity. Conclusions Soil heterogeneity can facilitate the invasion of R. typhina by enhancing the advantages over R. chinensis and altering interspecific competition. Phenotypic divergence rather than plasticity plays an important role in mediating interspecific competition.

To maximize the potential of biomass from invasive plants, waste leaves from Rhus typhina (RT) and Amorpha fruticosa (AF) were used to prepare activated carbons (ACs) for the efficient removal of chromium from wastewater. Six ACs were prepared by CO 2 activation at 850 °C with varying flow rates (500, 1000, and 1500 mL/min) and characterized by yield, pH, N 2 adsorption isotherm, FTIR, SEM, TG, and XPS. The adsorption isotherm and kinetics for chromium removal were analyzed. The outcomes showed that the ACs had mesoporous structures with specific surface areas of 408.05–701.01 m 2 /g and pore volumes of 0.360–0.653 cm 3 /g. The pores are distributed among the agglomerated nanoparticles on the surface of the granules. The existence of two kinds of chromium compounds and two valance states, Cr(III) and Cr(VI), in spent ACs was identified by the FTIR and XPS spectra. The Cr (VI) equilibrium data and adsorption kinetics were well-fit with the Langmuir isotherm ( R 2  = 0.936–0.967) and pseudo-second-order kinetic models ( R 2  = 0.795–0.937). The maximum Langmuir Cr adsorption capacities of ACRT1.0 and ACAF0.5 were estimated to be 266.54 and 255.21 mg/g at pH = 2.0, respectively. Concentrations of Cr(III) and Cr(VI) in filtrates after equilibrium, combined with XPS and TGA analysis of spent ACs, illustrated that Cr(VI) was converted to the less harmful trivalent chromate Cr(III) during the adsorption processes. Cr(III) and Cr(VI) probably formed compounds with carbon and nitrogen atoms on the surfaces of ACs. ACs with abundant surface N–H groups achieved high Cr adsorption performance. The waste leaves from these invasive plants are suitable for producing cost-effective and efficient ACs for removing Cr (VI) from water by chemical adsorption.

University campuses usually have more trees and can provide various ecosystem services. However, there are few reports on tree ecosystem services of Chinese university campuses, especially in northern China. This study investigated the trees in the campus of Shenyang Institute of Technology and analyzed its ecological benefits and monetary value through i-Tree Streets. The campus trees contained a total of 5193 trees of 66 species, of which Catalpa ovata G. Don, Acer mono Maxim., Rhus typhina Nutt, and Salix babylonica L. accounted for 59.7% of the total number. The age structure of the trees in the campus was not ideal, with 71.5% of young trees, 24.0% of maturing trees, 4.5% of mature trees, and only 0.04% of old trees. The trees in the campus provided more energy saving benefits ($60,850, $11.7/tree), carbon reduction benefits ($34,318, $6.6/tree) and aesthetic benefits ($30,150, $5.8/tree). The benefits resulted from air pollutant removal ($12,889, $2.5/tree) and rainwater runoff interception ($15,534, $3.0/tree) were smaller. In addition, tree species with more maturing trees and mature trees (i.e., with larger diameter at breast height) and large leaf area in the campus contributed significantly to ecosystem services. Our results can provide suggestions and certain insights for Chinese campus greening managers in tree species selection and tree management.