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acacia dealbata. 200818727463
nitrogen uptake by eucalyptus regnans and acacia spp. - preferences, resource overlap and energetic costs.in southeastern australia, the overstory species eucalyptus regnans f. muell. commonly grows with either of the two leguminous understory trees, acacia melanoxylon (r. br. ex ait. f.) or acacia dealbata (link.). our objective was to elucidate interactions between the dominant eucalypt and its companion acacias for nitrogen (n) sources. use of stable n isotopes as tracers revealed that ammonium was the preferred soil n source for all species, nevertheless, total n uptake varied greatly among spec ...200919203965
influence of bulking agent on sewage sludge composting process.four types of compost, consisting of mixtures of acacia dealbata (a) with sewage sludge (ss) were studied in a laboratory reactor. composting time was 80 days and parameters monitored over this period included temperature, organic matter, ph, co(2), o(2), c/n ratio, kjeldahl-n, as well as maturity indexes. all the studied parameters were influenced by the bulking amount used. the highest profile temperature measured was for the a/ss 1/2 (w/w) mixture that reached a maxima temperature of 67 degre ...200919560348
structural changes in soil communities after triclopyr application in soils invaded by acacia dealbata link.triclopyr is a commonly used herbicide in the control of woody plants and can exhibit toxic effects to soil microorganisms. however, the impact on soils invaded by plant exotics has not yet been addressed. here, we present the results of an 18-month field study conducted to evaluate the impact of triclopyr on the structure of fungal and bacterial communities in soils invaded by acacia dealbata link, through the use of denature gradient gel electrophoresis. after triclopyr application, analyses o ...201525602151
development of 23 polymorphic microsatellite loci in invasive silver wattle, acacia dealbata (fabaceae).microsatellite markers were developed for silver wattle, acacia dealbata (fabaceae), which is both an ornamental and an invasive weed species. it is native to southeastern australia and invasive in europe, africa, asia, and the americas.201525995979
does acacia dealbata express shade tolerance in mediterranean forest ecosystems of south america?the distribution of acacia dealbata link (fabaceae) in its non-native range is associated with disturbed areas. however, the possibility that it can penetrate the native forest during the invasion process cannot be ruled out. this statement is supported by the fact that this species has been experimentally established successfully under the canopy of native forest. nonetheless, it is unknown whether a. dealbata can express shade tolerance traits to help increase its invasive potential. we invest ...201526380668
emission factors of particulate matter, polycyclic aromatic hydrocarbons and levoglucosan from wood combustion in south central chile.in south central chile, wood stoves have been identified as an important source of air pollution in populated areas. eucalyptus (eucalyptus globulus), chilean oak (nothofagus oblique) and mimosa (acacia dealbata) were burned in a single chamber slow combustion wood stove at a controlled testing facility located at the university of concepción, chile. 2.7-3.1 kg of firewood were combusted in each experiment while continuously monitoring temperature, exhaust gases, burn rate, and collecting partic ...201728278036
establishment success of coexisting native and exotic trees under an experimental gradient of irradiance and soil moisture.the exotic trees ailanthus altissima, robinia pseudoacacia, acer negundo and elaeagnus angustifolia coexist with the native trees fraxinus angustifolia and ulmus minor in river banks of central spain. similarly, the exotic trees acacia dealbata and eucalyptus globulus co-occur with the natives quercus pyrenaica and pinus pinaster in northwest spain. we aimed to identify the environmental conditions that favour or hamper the establishment success of these species. in spring 2008, seeds of the stu ...201121842417
the response of fast- and slow-growing acacia species to elevated atmospheric co2: an analysis of the underlying components of relative growth rate.in this study we assessed the impact of elevated co2 with unlimited water and complete nutrient on the growth and nitrogen economy of ten woody acacia species that differ in relative growth rate (rgr). specifically, we asked whether fast- and slow-growing species systematically differ in their response to elevated co2. four slow-growing species from semi-arid environments (acacia aneura, a. colei, a. coriacea and a. tetragonophylla) and six fast-growing species from mesic environments (acacia de ...199928308305
relationships between stem diameter, sapwood area, leaf area and transpiration in a young mountain ash forest.we examined relationships between stem diameter, sapwood area, leaf area and transpiration in a 15-year-old mountain ash (eucalyptus regnans f. muell.) forest containing silver wattle (acacia dealbata link.) as a suppressed overstory species and mountain hickory (acacia frigescens j.h. willis) as an understory species. stem diameter explained 93% of the variation in leaf area, 96% of the variation in sapwood area and 88% of the variation in mean daily spring transpiration in 19 mountain ash tree ...199514965913
demonstration of long-chain n-alkyl caffeates and delta7-steryl glucosides in the bark of acacia species by gas chromatography-mass spectrometry.the gc-ms identification of several abundant long-chain aliphatic n-alkyl caffeates, together with other phydroxycinnamic acid esters, in the dichloromethane extracts of the bark of acacia dealbata and a. melanoxylon, is reported. in addition, the unambiguous differentiation between two delta7-steryl glucosides (namely, spinasteryl glucoside and dihydrospinasteryl glucosides) and the homologous delta5-steryl glucosides was achieved based on the ei-ms fragmentation features of their trimethylsily ...201317439016
resource distribution influences mating system in the bobuck (trichosurus cunninghami: marsupialia).mammalian mating systems are thought to be shaped by the spatial distribution and abundance of key resources, which in turn influence the spacing behaviour of individuals. in particular, female home range size is predicted to reflect the availability of key resources. we documented the availability and distribution of food and shelter resources for two neighbouring populations of bobucks, or mountain brushtail possums, trichosurus cunninghami, that were characterised by different mating systems: ...200717713792
an evaluation of the potential of acacia dealbata as raw material for bioethanol production.in this work, the potential of acacia dealbata as raw material for ethanol production was evaluated, as well as its composition with regard to cellulose, hemicelluloses, lignin, extractives and ash. the tree samples were subjected to several dilute acid pretreatments using a combined severity parameter ranging from 0.7 to 3.7. the highest ethanol concentration obtained was 10.31 g ethanol/l within 24 h by using a separate hydrolysis and fermentation of the water insoluble fraction after pretreat ...201121316950
characterisation and authentication of a. senegal and a. seyal exudates by infrared spectroscopy and chemometrics.the authentication of acacia gums samples requires usually the use of sophisticated and time consuming analytical techniques. there is a need for fast and simple analytical techniques for the objective of a quality control methodology. commercial acacia senegal and acacia seyal gums present characteristic mir spectra. principal component analysis of the infrared spectra of gum exudates of trees allow to distinguish acacia gums from another gum exudates (combretum, ghatti, karaya, tragacanth). mo ...201222980842
flash pyrolysis of forestry residues from the portuguese central inland region within the framework of the biorefina-ter project.the feasibility of the valorization by flash pyrolysis of forest shrub wastes, namely bushes (cytisus multiflorus, spartium junceum, acacia dealbata and pterospartum tridentatum) has been studied in a conical spouted bed reactor operating at 500 °c, with a continuous biomass feed and char removal. high bio-oil yields in the 75-80 wt.% range have been obtained for all of the materials, with char yields between 16 and 23 wt.% and low gas yields (4-5 wt.%). bio-oils are composed mainly of water (ac ...201323266853
analysis of commercial proanthocyanidins. part 4: solid state (13)c nmr as a tool for in situ analysis of proanthocyanidin tannins, in heartwood and bark of quebracho and acacia, and related species.(13)c nmr is an effective method of characterizing proanthocyanidin (pac) tannins in quebracho (schinopsis lorentzii) heartwood and black wattle (acacia mearnsii) bark, before and after commercial extraction. the b-rings of the constituent flavan-3-ols, catechols (quebracho) or pyrogallols (wattle), are recognized in unprocessed source materials by "marker" signals at ca. 118 or 105ppm, respectively. nmr allows the minimum extraction efficiency to be calculated; ca. 30%, and ca. 80%, for quebrac ...201323838626
diversity and symbiotic effectiveness of beta-rhizobia isolated from sub-tropical legumes of a brazilian araucaria forest.while the occurrence of betaproteobacteria occupying the nodules of tropical legumes has been shown, little is known about subtropical areas. araucaria forest is a subtropical endangered ecosystem, and a better understanding of the legume-rhizobial symbionts may allow their use in land reclamation. the 16s rrna gene of bacteria isolated from nine leguminous species was sequenced and their nodulation tested in mimosa scabrella and phaseolus vulgaris. 196 isolates were identified as eight genotype ...201323861038
will climate change drive alien invasive plants into areas of high protection value? an improved model-based regional assessment to prioritise the management of invasions.species distribution models (sdms) studies suggest that, without control measures, the distribution of many alien invasive plant species (ais) will increase under climate and land-use changes. due to limited resources and large areas colonised by invaders, management and monitoring resources must be prioritised. choices depend on the conservation value of the invaded areas and can be guided by sdm predictions. here, we use a hierarchical sdm framework, complemented by connectivity analysis of ai ...201324161807
soil and plant changing after invasion: the case of acacia dealbata in a mediterranean ecosystem.acacia dealbata link (fabaceae) is one of the most invasive species in the mediterranean ecosystems of europe, africa and america, where it has been proved to exert strong effects on soil and plant communities. in italy a. dealbata has been largely used for ornamental and forestry purpose and is nowadays spreading in several areas. the present study was addressed to evaluate the impacts on soil chemical properties, soil microbial communities and understory plant communities and to assess the rel ...201425151267
ambient has become strained. identification of acacia dealbata link volatiles interfering with germination and early growth of native species.acacia dealbata link is a widespread invader in mediterranean type ecosystems, and traits promoting its invasiveness are currently under investigation. due to the dense atmosphere below its canopy, we hypothesized that volatile organic compounds (vocs) released from flowers, leaves, litter, or a mixture of treatments exert inhibitory effects on the natives trifolium subterraneum, lolium multiflorum, medicago sativa, and also on its own seeds. we reported that vocs from flowers significantly redu ...201425260655
a biorefinery approach based on fractionation with a cheap industrial by-product for getting value from an invasive woody species.acacia dealbata wood (an invasive species) was subjected to fractionation with glycerol (a cheap industrial by-product), and the resulting solid phase was used as a substrate for enzymatic hydrolysis. glycerol fractionation allowed an extensive delignification while preserving cellulose in solid phase. the solids from the fractionation stage showed high susceptibility to enzymatic hydrolysis. solids obtained under selected fractionation conditions (glycerol content of media, 80 wt%; duration, 1h ...201425310866
effect of acetone extract from stem bark of acacia species (a. dealbata, a. ferruginea and a. leucophloea) on antioxidant enzymes status in hydrogen peroxide-induced hepg2 cells.acacia species are multipurpose trees, widely used in the traditional systems of medicine to treat various ailments. the major objective of the present study was to determine the gene expression of enzymatic antioxidants by acetone extract from the stem bark of three acacia species (acacia dealbata, acacia ferruginea and acacia leucophloea) in hydrogen peroxide (h2o2)-induced human hepatoma (hepg2) cells. the expression of antioxidant enzymes such as superoxide dismutase containing copper-zinc ( ...201526586994
impact of an invasive nitrogen-fixing tree on arbuscular mycorrhizal fungi and the development of native species.arbuscular mycorrhizal fungi (amf) are obligate soil biotrophs that establish intimate relationships with 80 % of terrestrial plant families. arbuscular mycorrhizal fungi obtain carbon from host plants and contribute to the acquisition of mineral nutrients, mainly phosphorus. the presence of invasive plants has been identified as a soil disturbance factor, often conditioning the structure and function of soil microorganisms. despite the investigation of many aspects related to the invasion ofaca ...201626984185
effect of different rates of spent coffee grounds (scg) on composting process, gaseous emissions and quality of end-product.the use of spent coffee grounds (scg) in composting for organic farming is a viable way of valorising these agro-industrial residues. in the present study, four treatments with different amounts of spent coffee grounds (scg) were established, namely, c0 (control), c10, c20 and c40, containing 0, 10, 20 and 40% of scg (dm), respectively; and their effects on the composting process and the end-product quality characteristics were evaluated. the mixtures were completed with acacia dealbata l. shoot ...201728340969
chemical composition of french mimosa absolute oil.since decades mimosa (acacia dealbata) absolute oil has been used in the flavor and perfume industry. today, it finds an application in over 80 perfumes, and its worldwide industrial production is estimated five tons per year. here we report on the chemical composition of french mimosa absolute oil. straight-chain analogues from c6 to c26 with different functional groups (hydrocarbons, esters, aldehydes, diethyl acetals, alcohols, and ketones) were identified in the volatile fraction. most of th ...201020070087
final report of the safety assessment of acacia catechu gum, acacia concinna fruit extract, acacia dealbata leaf extract, acacia dealbata leaf wax, acacia decurrens extract, acacia farnesiana extract, acacia farnesiana flower wax, acacia farnesiana gum, acacia senegal extract, acacia senegal gum, and acacia senegal gum extract.these ingredients are derived from various species of the acacia plant. only material derived from acacia senegal are in current use according to industry data. the concentration at which these ingredients are reported to be used ranges from 9% in mascara to 0.0001% in tonics, dressings, and other hair-grooming aids. gum arabic is a technical name for acacia senegal gum. gum arabic is comprised of various sugars and glucuronic acid residues in a long chain of galactosyl units with branched oligo ...200516422266
natural and induced polyploidy in acacia dealbata link. and acacia mangium willd.seeds were obtained from seven natural populations of acacia dealbata, three natural populations of a. mangium and a seed orchard of a. mangium, representing the natural range of the two species. polyploids were discovered in two of the seven populations of a. dealbata. the 2c dna amount for diploid a. dealbata (2n = 2x = 26) was 1.74 pg, and for diploid a. mangium (2n = 2x = 26) was 1.30 pg. a naturally occurring tetraploid of a. dealbata (2n = 4x = 52) had a 2c dna amount of 3.41 pg and a natu ...200212234151
whole-tree transpiration and water-use partitioning between eucalyptus nitens and acacia dealbata weeds in a short-rotation plantation in northeastern tasmania.whole-tree water use in 4- and 8-year-old plantations of eucalyptus nitens deane and maiden (ex maiden) in the presence and absence of acacia dealbata link. weeds was estimated by the heat pulse velocity technique during a six-week summer period. maximum sap velocities were recorded between 5 and 15 mm under the cambium for both eucalypt and acacia trees, and marked radial and axial variations in sap velocity were observed. the latter source of variation was most pronounced in mixed stands where ...200312651342
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