| ribotyping of rhizobia nodulating acacia mangium and paraserianthes falcataria from different geographical areas in indonesia using pcr-rflp-sscp (prs) and sequencing. | acacia mangium and paraserianthes falcataria are leguminous tree species widely grown for timber in indonesia and other tropical countries, yet little is known about the identity of their rhizobial symbionts. polymerase chain reaction-restriction fragment length polymorphism-single-strand conformational polymorphism (prs) analysis of the 16s rrna gene was used along with sequencing to assess the diversity of 57 rhizobia isolated from nodules of a. mangium and p. falctaria in indonesia. in total, ... | 2001 | 11359513 |
| [nutrient content in litterfall and its translocation in plantation forests in south china]. | the amounts of litterfall, nutrient content in it and leaves of five plantation forests in south china were determined. the order of litterfall biomass was in sequence of acacia mangium (11.1 t.hm-2) > pinus elliotii (7.3 t.hm-2) > schima superba (6.5 t.hm-2) > acacia auriculaiformis (4.8 t.hm-2) > eucalyptus citriodora (2.6 t.hm-2). a. mangium returned soil much more nutrient to soil through litterfall than other forests did. n, p and k were largely translocated from senescing leaves for all th ... | 2000 | 11767624 |
| [litterfalls of major forest stands at baiyunshan scenic spot of guangzhou]. | the productions, seasonal dynamics, macronutrient contents and decomposition rates of the litterfalls of four typical stands, e.g., pinus massoniana plantation, secondary evergreen broadleaved forest, acacia mangium plantation and schima superba-acacia mangium plantation at the scenic baiyunshan of guangzhou were studied. the litterfall productions of four stands in 1998 were 8.34, 6.77, 6.31 and 11.54 t.hm-2, respectively. the seasonal dynamics of litterfall amounts demonstrated the single-peak ... | 2003 | 12722462 |
| a novel symbiotic nitrogen-fixing member of the ochrobactrum clade isolated from root nodules of acacia mangium. | ten strains of root nodule bacteria were isolated from the nodules of acacia mangium grown in the philippines and thailand. partial sequences (approx. 300 bp) of the 16s rrna gene of each isolate were analyzed. the nucleotide sequences of strain dasa 35030 indicated high homology (>99%) with members of the genus ochrobactrum in brucellaceae, although the sequences of other isolates were homologous to those of two distinct genera bradyrhizobium and rhizobium. the strain dasa 35030 was strongly su ... | 2004 | 15057707 |
| preliminary evaluation of fungicidal and termiticidal activities of filtrates from biomass slurry fuel production. | biomass slurry fuel (bsf) production has recently been developed as a natural energy for the conversion of solid biomass into fuel. in addition to using fuel, filtrates from bsf production may also serve a chemical source with several organic compounds. there is an increasing interest in the research and application of biomass-based filtrates. in this study, fungicidal and termiticidal properties of filtrates from bsf production using sugi (cryptomeria japonica) and acacia (acacia mangium) wood ... | 2004 | 15207293 |
| sporocarps of pisolithus albus as an ecological niche for fluorescent pseudomonads involved in acacia mangium wild - pisolithus albus ectomycorrhizal symbiosis. | fresh sporocarps and root and soil samples were collected under a monospecific forest plantation of acacia mangium in dagana in northern senegal and checked for the presence of fluorescent pseudomonads. no bacteria were detected except from sporocarps collected with adhering soil and hyphal strands. pisolithus sporocarps were dried at 30 degrees c for 2 weeks, ground, passed through a 2-mm sieve and mixed together. this dry sporocarp powder (dsp) was used to inoculate and form mycorrhizas on a. ... | 2004 | 15644922 |
| potential allelochemicals from an invasive weed mikania micrantha h.b.k. | phytotoxicity-directed extraction and fractionation of the aerial parts of mikania micrantha h.b.k. led to the isolation and identification of three sesquiterpenoids: dihydromikanolide, deoxymikanolide, and 2,3-epoxy-1-hydroxy-4,9-germacradiene-12,8:15,6-diolide. these sesquiterpenoids inhibited both germination and seedling growth of tested species with deoxymikanolide possessing the strongest phytotoxicity. in a bioassay against lettuce (lectuca sativa l.), deoxymikanolide reduced radicle elon ... | 2005 | 16222800 |
| inoculation of acacia mangium with alginate beads containing selected bradyrhizobium strains under field conditions: long-term effect on plant growth and persistence of the introduced strains in soil. | the growth response of acacia mangium willd. to inoculation with selected bradyrhizobium strains was investigated in two field trials in the ivory coast (west africa). in the first trial (anguededou), four provenances (i.e., trees originating from seeds harvested in different geographical areas) of a. mangium were inoculated with four bradyrhizobium strains from different origins. six months after being transplanted in the field, the heights of all inoculated trees showed a statistically signifi ... | 1994 | 16349430 |
| [responses of canopy stomatal conductance of acacia mangium forest to environmental driving factors]. | employing granierś probes, this paper measured the sap flow of 14 sample trees in an acacia mangium forest on the heshan hilly lands of guangdong province, and recorded the photosynthetic active radiation (par), air relative humidity (rh) , and air temperature (t) above the forest canopy. the whole-tree transpiration (e), stand transpiration (et), and mean canopy stomatal conductance (gc) were calculated, and the relationships between tree morphological characters and whole-tree water use as wel ... | 2006 | 17044483 |
| [time lag effect between stem sap flow and photosynthetically active radiation, vapor pressure deficit of acacia mangium]. | based on the measurement of the stem sap flow of acacia mangium with granier' s thermal dissipation probe, and the cross-correlation and time serial analysis of the sap flow and corresponding photosynthetically active radiation and vapor pressure deficit, this paper studied the time lag effect between the stem sap flow of a. mangium and the driving factors of the tree canopy transpiration. the results indicated that the main driving factors of the transpiration were photosynthetically active rad ... | 2008 | 18464623 |
| bradyrhizobia nodulating the acacia mangium x a. auriculiformis interspecific hybrid are specific and differ from those associated with both parental species. | in the context of an increasing utilization of the interspecific hybrid acacia mangium x a. auriculiformis as a plantation tree in the tropical humid zone, its symbiotic characterization was carried out in comparison with that of its two parental species. rhizobium strains of diverse geographical origins were isolated from root nodules of the hybrid and its parents. almost all acacia hybrid isolates were fast growing on yeast extract-mannitol medium, in contrast to those isolated from both paren ... | 2009 | 19854923 |
| [mercury pollution investigation in predominant plants surrounding shenzhen qingshuihe municipal solid waste incineration plant]. | in order to investigate the effects of mercury emission from municipal solid waste incineration (mswi) on the surrounding plants and soils, the mercury concentrations were examined in the plant samples including leaves and stems and the soil samples around shenzhen qingshuihe mswi plant. results show that, these plants are significantly polluted by mercury, the mercury concentrations of the plant leaves are 0.030 9-0.246 7 mg x kg(-1), with the mean value 0.094 8 mg x kg(-1), among the local pro ... | 2009 | 19927841 |
| evaluation of tropical plants containing tannin on in vitro methanogenesis and fermentation parameters using rumen fluid. | methane (ch(4)) produced during ruminal fermentation represents a loss of 10-11% of gross energy intake. the use of browse species containing tannin as feed supplement for ruminants tends to increase in order to reduce ch(4) production. the present study was conducted to evaluate some tropical plants containing tannin as feed supplement (200 g kg(-1)) on in vitro ch(4) production and fermentation parameters. | 2010 | 20355068 |
| phenolic extracts from acacia mangium bark and their antioxidant activities. | phenolic compounds are present at very high concentrations in the bark of acacia mangium. these compounds are known to have strong antioxidant activity and thus different beneficial effects on human health. phenolic compounds in bark of a. mangium were extracted and their antioxidant activities were investigated using the 1,1-diphenyl-2-picrylhydrazyl (dpph) free radical-scavenging and ferric-reducing antioxidant power (frap) assays. a central composite design has been employed to optimize the e ... | 2010 | 20657499 |
| permanent genetic resources added to molecular ecology resources database 1 august 2010-30 september 2010. | this article documents the addition of 229 microsatellite marker loci to the molecular ecology resources database. loci were developed for the following species: acacia auriculiformis × acacia mangium hybrid, alabama argillacea, anoplopoma fimbria, aplochiton zebra, brevicoryne brassicae, bruguiera gymnorhiza, bucorvus leadbeateri, delphacodes detecta, tumidagena minuta, dictyostelium giganteum, echinogammarus berilloni, epimedium sagittatum, fraxinus excelsior, labeo chrysophekadion, oncorhynch ... | 2011 | 21429127 |
| genetic diversity of symbiotic bradyrhizobium elkanii populations recovered from inoculated and non-inoculated acacia mangium field trials in brazil. | acacia mangium is a legume tree native to australasia. since the eighties, it has been introduced into many tropical countries, especially in a context of industrial plantations. many field trials have been set up to test the effects of controlled inoculation with selected symbiotic bacteria versus natural colonization with indigenous strains. in the introduction areas, a. mangium trees spontaneously nodulate with local and often ineffective bacteria. when inoculated, the persistence of inoculan ... | 2011 | 21531520 |
| genotypic diversity among rhizospheric bacteria of three legumes assessed by cultivation-dependent and cultivation-independent techniques. | the genotypic diversity of rhizospheric bacteria of 3 legumes including vigna radiata, arachis hypogaea and acacia mangium was compared by using cultivation-dependent and cultivation-independent methods. for cultivation-dependent method, random amplified polymorphic dna (rapd) profiles revealed that the bacterial genetic diversity of v. radiata and a. mangium rhizospheres was higher than that of a. hypogaea rhizosphere. for cultivation-independent method, denaturing gradient gel electrophoresis ... | 2011 | 22806857 |
| bacteria of the genus rhodopseudomonas (bradyrhizobiaceae): obligate symbionts in mycelial cultures of the black truffles tuber melanosporum and tuber brumale. | this work aimed at characterizing 12 isolates of the genus tuber including tuber melanosporum (11 isolates) and tuber brumale (one isolate). this was done using internal transcribed spacer (its) sequences, confirming their origin. | 2016 | 27468385 |
| identification of lignin genes and regulatory sequences involved in secondary cell wall formation in acacia auriculiformis and acacia mangium via de novo transcriptome sequencing. | acacia auriculiformis × acacia mangium hybrids are commercially important trees for the timber and pulp industry in southeast asia. increasing pulp yield while reducing pulping costs are major objectives of tree breeding programs. the general monolignol biosynthesis and secondary cell wall formation pathways are well-characterized but genes in these pathways are poorly characterized in acacia hybrids. rna-seq on short-read platforms is a rapid approach for obtaining comprehensive transcriptomic ... | 2011 | 21729267 |
| differing courses of genetic evolution of bradyrhizobium inoculants as revealed by long-term molecular tracing in acacia mangium plantations. | introducing nitrogen-fixing bacteria as an inoculum in association with legume crops is a common practice in agriculture. however, the question of the evolution of these introduced microorganisms remains crucial, both in terms of microbial ecology and agronomy. we explored this question by analyzing the genetic and symbiotic evolution of two bradyrhizobium strains inoculated on acacia mangium in malaysia and senegal 15 and 5 years, respectively, after their introduction. based on typing of sever ... | 2014 | 25002434 |
| ima genome-f 2: ceratocystis manginecans, ceratocystis moniliformis, diplodia sapinea: draft genome sequences of diplodia sapinea, ceratocystis manginecans, and ceratocystis moniliformis. | the draft nuclear genomes of diplodia sapinea, ceratocystis moniliformis s. str., and c. manginecans are presented. diplodia sapinea is an important shoot-blight and canker pathogen of pinus spp., c. moniliformis is a saprobe associated with wounds on a wide range of woody angiosperms and c. manginecans is a serious wilt pathogen of mango and acacia mangium. the genome size of d. sapinea is estimated at 36.97 mb and contains 13 020 predicted genes. ceratocystis moniliformis includes 25.43 mb and ... | 2014 | 25083413 |
| treatment of tropical forages with exogenous fibrolytic enzymes: effects on chemical composition and in vitro rumen fermentation. | the effects of three treatments of fibrolytic enzymes (cellulase from trichoderma longibrachiatum (cel), xylanase from rumen micro-organisms (xyl) and a 1:1 mixture of cel and xyl (mix) on the in vitro fermentation of two samples of pennisetum clandestinum (p1 and p2), two samples of dichanthium aristatum (d1 and d2) and one sample of each acacia decurrens and acacia mangium (a1 and a2) were investigated. the first experiment compared the effects of two methods of applying the enzymes to forages ... | 2015 | 24605885 |
| fungal planet description sheets: 320-370. | novel species of fungi described in the present study include the following from malaysia: castanediella eucalypti from eucalyptus pellita, codinaea acacia from acacia mangium, emarcea eucalyptigena from eucalyptus brassiana, myrtapenidiella eucalyptorum from eucalyptus pellita, pilidiella eucalyptigena from eucalyptus brassiana and strelitziana malaysiana from acacia mangium. furthermore, stachybotrys sansevieriicola is described from sansevieria ehrenbergii (tanzania), phacidium grevilleae fro ... | 2015 | 26240451 |
| isolation and characterization of ccoaomt in interspecific hybrid of acacia auriculiformis x acacia mangium--a key gene in lignin biosynthesis. | this study was directed at the understanding of the function of ccoaomt isolated from acacia auriculiformis x acacia mangium. full length cdna of the acacia hybrid ccoaomt (ahccoaomt) was 1024-bp long, containing 750-bp coding regions, with one major open reading frame of 249 amino acids. on the other hand, full length genomic sequence of the ccoaomt (ahgflccoaomt) was 2548 bp long, containing three introns and four exons with a 5' untranslated region (5'utr) of 391 bp in length. the 5'utr of th ... | 2014 | 25222227 |
| molecular characterization of a cellulose synthase gene (aaxmcesa1) isolated from an acacia auriculiformis x acacia mangium hybrid. | cellulose is the major component of plant cell walls, providing mechanical strength to the structural framework of plants. in association with lignin, hemicellulose, protein and pectin, cellulose forms the strong yet flexible bio-composite tissue of wood. wood formation is an essential biological process and is of significant importance to the cellulosic private sector industry. cellulose synthase genes encode the catalytic subunits of a large protein complex responsible for the biogenesis of ce ... | 2013 | 24415841 |
| development of high-throughput snp-based genotyping in acacia auriculiformis x a. mangium hybrids using short-read transcriptome data. | next generation sequencing has provided comprehensive, affordable and high-throughput dna sequences for single nucleotide polymorphism (snp) discovery in acacia auriculiformis and acacia mangium. like other non-model species, snp detection and genotyping in acacia are challenging due to lack of genome sequences. the main objective of this study is to develop the first high-throughput snp genotyping assay for linkage map construction of a. auriculiformis x a. mangium hybrids. | 2012 | 23265623 |
| 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 ... | 2002 | 12234151 |
| preparation and characterization of nanocrystalline cellulose from acacia mangium and its reinforcement potential. | acacia mangium, a fast growing tree is widely planted in malaysia. converting acacia wood into nanocellulose could create new value added products for forest-based industry. nanocrystalline cellulose (ncc) was prepared from acacia mangium wood pulp via 64wt% sulfuric acid hydrolysis. prior to acid hydrolysis, acacia mangium was subjected to pulping followed by bleaching in order to remove non-cellulosic fragments. acid hydrolysis was carried out on bleached pulp to produce the needle-like ncc wi ... | 2017 | 28189225 |
| application of optimized large surface area date stone (phoenix dactylifera ) activated carbon for rhodamin b removal from aqueous solution: box-behnken design approach. | box-behnken model of response surface methodology was used to study the effect of adsorption process parameters for rhodamine b (rhb) removal from aqueous solution through optimized large surface area date stone activated carbon. the set experiments with three input parameters such as time (10-600min), adsorbent dosage (0.5-10g/l) and temperature (25-50°c) were considered for statistical significance. the adequate relation was found between the input variables and response (removal percentage of ... | 2017 | 28167440 |
| cryptophlebia walsingham, 1900, thaumatotibia zacher, 1915, and archiphlebia komai & horak, 2006, in australia (lepidoptera: tortricidae: olethreutinae: grapholitini). | the australian species of the grapholitine genera cryptophlebia walsingham, 1900, thaumatotibia zacher, 1915 and archiphlebia komai & horak, 2006, are revised, described and illustrated. a key to species is provided. five named species of cryptophlebia, c. ombrodelta (lower), c. iridosoma (meyrick), c. rhynchias (meyrick) and c. pallifimbriana bradley, are redescribed and three new species, c. wraggae, sp. nov., c. stigmata, sp. nov., and c. caulicola, sp. nov., are described. cryptophlebia ambl ... | 2016 | 27811682 |
| subterranean termite resistance of polystyrene-treated wood from three tropical wood species. | the objective of this work was to investigate the resistance of three indonesian wood species to termite attack. samples from sengon (falcataria moluccana), mangium (acacia mangium), and pine (pinus merkusii) were treated with polystyrene at loading levels of 26.0%, 8.6%, and 7.7%, respectively. treated and untreated samples were exposed to environmental conditions in the field for 3 months. untreated specimens of sengon, mangium, and pine had resistance ratings of 3.0, 4.6, and 2.4, respectivel ... | 2016 | 27455331 |
| first report of lecanodiaspis dendrobii douglas, 1892 (hemiptera: lecanodiaspididae) and the associated parasitoid cephaleta sp. (hymenoptera: pteromalidae) in brazil. | lecanodiaspis dendrobii douglas, 1892 (hemiptera: coccoidea: lecanodiaspididae) and the associated parasitoid cephaleta sp. (hymenoptera: pteromalidae) are reported for the first time in brazil. specimens of this scale insect were collected on branches and stems of acacia mangium willd., leucaena leucocephala (lam.) de wit (fabaceae), morus nigra l. (moraceae), citrus reticulata blanco (rutaceae), tectona grandis l. f. (verbenaceae), anacardium occidentale (anacardiaceae), annona squamosa l. and ... | 2016 | 26871743 |
| eco-exergy and emergy based self-organization of three forest plantations in lower subtropical china. | the bio-thermodynamic structures of a mixed native species plantation, a conifer plantation and an acacia mangium plantation in southern china were quantified over a period of 15 years based on eco-exergy methods. the efficiencies of structural development and maintenance were quantified through an integrated application of eco-exergy and emergy methods. the results showed that the storage of eco-exergy increased over 3 times in all three plantations, as predicted by the maximum eco-exergy princ ... | 2015 | 26486821 |
| intercropped silviculture systems, a key to achieving soil fungal community management in eucalyptus plantations. | fungi are ubiquitous and important contributors to soil nutrient cycling, playing a vital role in c, n and p turnover, with many fungi having direct beneficial relationships with plants. however, the factors that modulate the soil fungal community are poorly understood. we studied the degree to which the composition of tree species affected the soil fungal community structure and diversity by pyrosequencing the 28s rrna gene in soil dna. we were also interested in whether intercropping (mixed pl ... | 2015 | 25706388 |
| [water use of re-vegetation pioneer tree species schima superba and acacia mangium in hilly land of south china]. | the xylem sap flows of two pioneer tree species, i.e., acacia mangium and schima superba, in degraded hill lands of south china, were continually monitored with granier' s thermal dissipation probes during 2004-2007 and 2008-2012, respectively, and their seasonal transpiration changes at different tree age levels were compared. the results showed that the annual transpiration of both species increased with tree ages, and s. superba demonstrated a higher value than a. mangium. the average annual ... | 2014 | 25011282 |
| phytoprotective effect of arbuscular mycorrhizal fungi species against arsenic toxicity in tropical leguminous species. | arbuscular mycorrhizal fungi (amf) improve the tolerance of hosting plants to arsenic (as) in contaminated soils. this work assessed the phytoprotective effect of glomus etunicatum, acaulospora morrowiae, gigaspora gigantea, and acaulospora sp. on four leguminous species (acacia mangium, crotalaria juncea, enterolobium contortisiliquum, and stizolobium aterrimum) in an as-contaminated soil from a gold mining area. amf root colonization, biomass production, as and p accumulation, as well as arsen ... | 2014 | 24933888 |
| sward characteristics and performance of dairy cows in organic grass-legume pastures shaded by tropical trees. | the silvopastoral system (sps) has been suggested to ensure sustainability in animal production systems in tropical ecosystems. the objective of this study was to evaluate pasture characteristics, herbage intake, grazing activity and milk yield of holstein×zebu cows managed in two grazing systems (treatments): sps dominated by a graminaceous forage (brachiaria decumbens) intercropped with different leguminous herbaceous forages (stylosanthes spp., pueraria phaseoloides and calopogonium mucunoide ... | 2014 | 24703358 |
| biobleaching of acacia kraft pulp with extracellular enzymes secreted by irpex lacteus kb-1.1 and lentinus tigrinus lp-7 using low-cost media. | the white-rot fungi irpex lacteus kb-1.1 and lentinus tigrinus lp-7 have been shown in previous studies to have high biobleaching activity in vivo. the aim of this study was to investigate the activities and stabilities of extracellular enzymes, prepared from i. lacteus and l. tigrinus culture grown in three types of economical media of agricultural and forestry wastes, for biobleaching of acacia oxygen-delignified kraft pulp using kappa number reduction as an indicator of delignification. after ... | 2014 | 24699808 |
| gibberellin mediates the development of gelatinous fibres in the tension wood of inclined acacia mangium seedlings. | gibberellin stimulates negative gravitropism and the formation of tension wood in tilted acacia mangium seedlings, while inhibitors of gibberellin synthesis strongly inhibit the return to vertical growth and suppress the formation of tension wood. to characterize the role of gibberellin in tension wood formation and gravitropism, this study investigated the role of gibberellin in the development of gelatinous fibres and in the changes in anatomical characteristics of woody elements in acacia man ... | 2013 | 24043495 |
| [seasonal differences in the leaf hydraulic conductance of mature acacia mangium in response to its leaf water use and photosynthesis]. | in this study, measurements were made on the leaf water potential (psi1), stomatal conductance (g(s)), transpiration rate, leaf area index, and sapwood area of mature acacia mangium, aimed to understand the relationships of the leaf hydraulic conductance (k1) with the leaf water use and photosynthetic characteristics of the a. mangium in wet season (may) and dry season (november). the ratio of sapwood area to leaf area (a(sp)/a(cl)) of the larger trees with an average height of 20 m and a diamet ... | 2013 | 23717989 |
| growth and reproductive performance of sambar deer in sabal forest reserve of sarawak, malaysia. | we examined the growth, reproduction, rutting behavior, and health status of sambar deer (cervus unicolor brookei) in secondary acacia mangium plantation. the data were collected over 11 years from a breeding herd of 21 stags and 33 hinds in sabal forest reserve, sarawak, malaysia. brody's growth model of the pooled data is y t = 148.56 (1 - 0.98e(-0.023t)), which estimates that maximum weights of adults are 184 and 115 kg for males and females respectively. sambar deer are nonseasonal breeders ... | 2013 | 23475732 |
| new findings on the pollination biology of mauritia flexuosa (arecaceae) in roraima, brazil: linking dioecy, wind, and habitat. | | 2013 | 23455480 |
| structural and chemical characterization of hardwood from tree species with applications as bioenergy feedstocks. | eucalypt species are a group of flowering trees widely used in pulp production for paper manufacture. for several decades, the wood pulp industry has focused research and development efforts on improving yields, growth rates and pulp quality through breeding and the genetic improvement of key tree species. recently, this focus has shifted from the production of high quality pulps to the investigation of the use of eucalypts as feedstocks for biofuel production. here the structure and chemical co ... | 2012 | 23300786 |
| characterization of micrornas expressed during secondary wall biosynthesis in acacia mangium. | micrornas (mirnas) play critical regulatory roles by acting as sequence specific guide during secondary wall formation in woody and non-woody species. although thousands of plant mirnas have been sequenced, there is no comprehensive view of mirna mediated gene regulatory network to provide profound biological insights into the regulation of xylem development. herein, we report the involvement of six highly conserved amg-mirna families (amg-mir166, amg-mir172, amg-mir168, amg-mir159, amg-mir394, ... | 2012 | 23251324 |
| mixing eucalyptus and acacia trees leads to fine root over-yielding and vertical segregation between species. | the consequences of diversity on belowground processes are still poorly known in tropical forests. the distributions of very fine roots (diameter <1 mm) and fine roots (diameter <3 mm) were studied in a randomized block design close to the harvest age of fast-growing plantations. a replacement series was set up in brazil with mono-specific eucalyptus grandis (100e) and acacia mangium (100a) stands and a mixture with the same stocking density and 50% of each species (50a:50e). the total fine root ... | 2013 | 23180423 |
| in vitro propagation of acacia mangium and a. mangium × a. auriculiformis. | acacia mangium and a. mangium × a. auriculiformis hybrids have gained an increasing interest in reafforestation programs under the humid tropical conditions, mainly for pulpwood production. this is due to their impressive growth on acid and degraded soils, as well as their capability to restore soil fertility thanks to their natural nitrogen-fixing ability. it is crucial to develop efficient methods for improving the genetic quality and the mass production of the planting stocks of these species ... | 2013 | 23179700 |
| phytostabilization of a pb-contaminated mine tailing by various tree species in pot and field trial experiments. | the potential of 6 tree species (leucaena leucocephala, acacia mangium, peltophorum pterocarpum, pterocarpus macrocarpus, lagerstroemia floribunda, eucalyptus camaldulensis) for phytoremediation of pb in sand tailings (total pb >9850 mg kg(-1)) from kemco pb mine in kanchanaburi province, thailand, were investigated employing a pot experiment (3 months) and field trial experiment (12 months). in pot study e. camaldulensis treated with osmocote fertilizer attained the highest total biomass (15.3 ... | 2012 | 22908655 |
| the breeding systems of diploid and neoautotetraploid clones of acacia mangium willd. in a synthetic sympatric population in vietnam. | colchicine-induced neoautotetraploid genotypes of acacia mangium were cloned and planted in mixture with a set of diploid clones in an orchard in southern vietnam. following good general flowering, open-pollinated seed was collected from trees of both cytotypes and microsatellite markers were used to determine the breeding system as characterised by the proportion of outcrosses in young seedling progeny. as predicted from the literature, the progeny of diploid clones were predominantly outcrosse ... | 2012 | 22865285 |
| gibberellin is required for the formation of tension wood and stem gravitropism in acacia mangium seedlings. | angiosperm trees generally form tension wood on the upper sides of leaning stems. the formation of tension wood is an important response to gravitational stimulus. gibberellin appears to be involved in the differentiation of secondary xylem, but it remains unclear whether gibberellin plays a key role in the formation of tension wood and plant gravitropism. therefore, a study was designed to investigate the effects of gibberellin and of inhibitors of the synthesis of gibberellin, namely paclobutr ... | 2012 | 22843341 |
| production and carbon allocation in monocultures and mixed-species plantations of eucalyptus grandis and acacia mangium in brazil. | introducing nitrogen-fixing tree species in fast-growing eucalypt plantations has the potential to improve soil nitrogen availability compared with eucalypt monocultures. whether or not the changes in soil nutrient status and stand structure will lead to mixtures that out-yield monocultures depends on the balance between positive interactions and the negative effects of interspecific competition, and on their effect on carbon (c) uptake and partitioning. we used a c budget approach to quantify g ... | 2012 | 22588515 |
| [litter decomposition of dominant plantations in guangxi and its effects on leachate quality]. | to understand the decomposition characteristics of the litters in different forest plantations and the effects of released substances during litter decomposition on the leachate quality, litter samples (leaf, shoot, and cortices) were collected from five forest plantations (1 year-old eucalyptus urophylla x e. grandis, eu1; 4 year-old eucalyptus urophylla x e. grandis, eu4; 7 year-old acacia mangium x a. auriculaef, am; 13 year-old pinus massoniana lamb, pl; and mixed broad-leaved softwood, bl), ... | 2012 | 22489473 |
| relationship between wood color parameters measured by the cielab system and extractive and phenol content in acacia mangium and vochysia guatemalensis from fast-growth plantations. | the heterogeneity of color distribution between sapwood and heartwood limits the market for wood from fast-growth plantations of tropical species. wood color is associated with wood extractives contents. this study presents the relationship between wood color parameters measured by the cielab color system and total amount of extractives and phenolic-type extractives in ethanol-toluene and hot water extracts of wood from two fast-growth plantation species. the results demonstrated that the differ ... | 2012 | 22450677 |
| expression profile of small rnas in acacia mangium secondary xylem tissue with contrasting lignin content - potential regulatory sequences in monolignol biosynthetic pathway. | lignin, after cellulose, is the second most abundant biopolymer accounting for approximately 15-35% of the dry weight of wood. as an important component during wood formation, lignin is indispensable for plant structure and defense. however, it is an undesirable component in the pulp and paper industry. removal of lignin from cellulose is costly and environmentally hazardous process. tremendous efforts have been devoted to understand the role of enzymes and genes in controlling the amount and co ... | 2011 | 22369296 |
| resistance of particleboards made from fast-growing wood species to subterranean termite attack. | laboratory-made particleboards were tested for their resistance to subterranean termite, coptotermes curvignathus holmgren (order isoptera, family termitidae) by indonesian standard sni 01.7207-2006, during four weeks and at the end of the test their mass loss percentage and feeding rate were determined. particleboards consisted of: jabon (anthocephalus cadamba, family rubiacea) with a density of 0.41 g/cm³; sungkai (peronema canescens, family verbenaceae) with a density of 0.46 g/cm³; mangium ( ... | 2012 | 26466542 |
| termite-susceptible species of wood for inclusion as a reference in indonesian standardized laboratory testing. | standardized laboratory testing of wood and wood-based products against subterranean termites in indonesia (sni 01.7207-2006) (sni) has no requirement for the inclusion of a comparative reference species of wood (reference control). this is considered a weakness of the indonesian standard. consequently, a study was undertaken to identify a suitable indonesian species of community wood that could be used as a reference control. four candidate species of community woods: acacia mangium, hevea bras ... | 2012 | 26466532 |
| a cell-type-specific defect in border cell formation in the acacia mangium root cap developing an extraordinary sheath of sloughed-off cells. | root caps release border cells, which play central roles in microbe interaction and root protection against soil stresses. however, the number and connectivity of border cells differ widely among plant species. better understanding of key border-cell phenotype across species will help define the total function of border cells and associated genes. | 2011 | 21712296 |
| lignin biodegradation and ligninolytic enzyme studies during biopulping of acacia mangium wood chips by tropical white rot fungi. | white rot fungi are good lignin degraders and have the potential to be used in industry. in the present work, phellinus sp., daedalea sp., trametes versicolor and pycnoporus coccineus were selected due to their relatively high ligninolytic enzyme activity, and grown on acacia mangium wood chips under solid state fermentation. results obtained showed that manganese peroxidase produced is far more compared to lignin peroxidase, suggesting that mnp might be the predominating enzymes causing lignin ... | 2011 | 25187145 |
| [litter decomposition and nutrient release in acacia mangium plantations established on degraded soils of colombia]. | several factors control the decomposition in terrestrial ecosystems such as humidity, temperature, quality of litter and microbial activity. we investigated the effects of rainfall and soil plowing prior to the establishment of acacia mangium plantations, using the litterbag technique, during a six month period, in forests plantations in bajo cauca region, colombia. the annual decomposition constants (k) of simple exponential model, oscillated between 1.24 and 1.80, meanwhile k1 y k2 decompositi ... | 2011 | 21516640 |
| decomposition of lignin and holocellulose on acacia mangium leaves and twigs by six fungal isolates from nature. | this research was conducted in the aim of preventing wild fire through reducing potential energy source to become in situ fertilizer. to prevent forest fires by reducing wood waste using lignocellulose-degrading fungi, six fungal isolates were tested for lignin and cellulose-degrading activity with acacia mangium leaves and twigs over a period of 1 to 3 months. the fungi degraded 8.9-27.1% of the lignin and 14-31% of the holocellulose. the degradation rate varied depending on the fungal species. ... | 2010 | 21061911 |
| [net co2 exchange and carbon isotope flux in acacia mangium plantation]. | by using stable carbon isotope technique, the leaf-level 13c discrimination was integrated to canopy-scale photosynthetic discrimination (deltacanopy) through weighted the net co2 assimilation (anet) of sunlit and shaded leaves and the stand leaf area index (l) in an a. mangium plantation, and the carbon isotope fluxes from photosynthesis and respiration as well as their net exchange flux were obtained. there was an obvious diurnal variation in deltacanopy, being lower at dawn and at noon time ( ... | 2009 | 20135988 |
| [caloric value and ash content of dominant plants in plantation communities in heshan of guangdong, china]. | different parts of twenty dominant plant species in five plantation communities on the subtropical hilly lands in heshan of gunagdong as well as the litters from three of the five plantation communities were sampled, and their gross caloric value (gcv) and ash content were measured by using a parr-1281 oxygen bomb calorimeter and a muffle furnace. based on the measurements, the ash-free caloric value (afcv) of the samples was calculated, and the characteristics of caloric value and ash content o ... | 2009 | 19637580 |
| [effects of tree height on whole-tree water use of acacia mangium]. | by using granier's thermal dissipation probe, the sap flow of 14 sample trees in a 22-year old acacia mangium forest in hilly land of south china was continuously measured in 2004. environmental factors including the photosynthetically active radiation, air temperature, and air humidity above canopy and the water content in 0-30 cm soil layer were monitored simultaneously. combining with the tree morphological features and sap flux density, the whole-tree transpiration, canopy stomatal conductan ... | 2009 | 19449559 |
| modelling changes in leaf shape prior to phyllode acquisition in acacia mangium willd. seedlings. | the aim of this study was to characterise changes in leaf shape prior to phyllode acquisition along the axes of acacia mangium seedlings. the study area was located in north lampung (south sumatra, indonesia), where these trees belong to a naturally regenerated stand. a total of 173 seedlings, less than three months old, were described node by node. leaf shape and leaf length were recorded and the way in which one leaf type succeeded another was modelled using a hidden semi-markov chain composed ... | 2008 | 18241805 |
| citrate-release-mediated aluminum resistance is coupled to the inducible expression of mitochondrial citrate synthase gene in paraserianthes falcataria. | aluminum (al) resistance in some leguminous plants is achieved by enhanced citrate release from roots. enhancement requires several hours for complete activation and is postulated to involve al-responsive genes or components. we examined the mechanism of al-induced citrate release by studying the relationship between citrate release and expression of the mitochondrial citrate synthase (mcs) gene in three leguminous trees. root elongation in leucaena leucocephala (lam.) de wit was arrested within ... | 2006 | 16452070 |
| chemical composition and structural features of the macromolecular components of plantation acacia mangium wood. | the wood of acacia mangium, a prominent fast-growing plantation species used in the pulp-and-paper industry and, so far, poorly investigated for its chemical structure, was submitted to a detailed characterization of its main macromolecular components. lignin (28% wood weight) isolated by mild acidolysis and characterized by permanganate oxidation, 1h and 13c nmr, and gpc, showed a very low content of syringylpropane-derived units (s:g:h of 48:49:3), a high degree of condensation, a low content ... | 2005 | 16190642 |
| comparison of antifungal and antioxidant activities of acacia mangium and a. auriculiformis heartwood extracts. | the effect of heartwood extracts from acacia mangium (heartrot-susceptible) and a. auriculiformis (heartrot-resistant) was examined on the growth of wood rotting fungi with in vitro assays. a. auriculiformis heartwood extracts had higher antifungal activity than a. mangium. the compounds 3,4',7,8-tetrahydroxyflavanone and teracacidin (the most abundant flavonoids in both species) showed antifungal activity. a. auriculiformis contained higher levels of these flavonoids (3.5- and 43-fold higher, r ... | 2005 | 16124251 |
| isolation and characterization of flower-specific transcripts in acacia mangium. | acacia mangium willd. is a legume tree species native to subtropical and tropical regions of asia and australia. many features of its flower development are common to other legume tree species. to identify genes involved in its floral development, we constructed a subtractive flower cdna library against vegetative tissues. the 1123 expressed sequence tags (ests) represented 576 unique genes. macroarray analysis further identified 147 of these genes as specific to the early, late or whole floweri ... | 2005 | 15574398 |
| genomic dna methylation of juvenile and mature acacia mangium micropropagated in vitro with reference to leaf morphology as a phase change marker. | genomic dna methylation was analyzed in acacia mangium willd. microshoots micropropagated in vitro from juvenile and mature explants, and in relation to leaf morphology of the microshoots, which is considered a phase change indicator. based on high performance liquid chromatography (hplc) analyses, we found more dna methylation in microshoots exhibiting juvenile leaf morphology (22.4%) than in microshoots of the mature phyllode morphological type (20.7%), irrespective of the age of the source ma ... | 2004 | 14757579 |
| assessment of management-dependent nutrient losses in tropical industrial tree plantations. | industrial tree plantations in the tropics usually follow short rotations and intensive site management including slash and burn, and the use of heavy machinery. we attempt to quantify the implied nutrient losses (harvest export, erosion, slash and burn, leaching) in order to give plantation managers a chance to understand the significance of their planning and decisions. we used the scarce globally available information and a case study plantation in east kalimantan, indonesia (acacia mangium a ... | 2003 | 12733794 |
| improving linkage analysis in outcrossed forest trees - an example from acacia mangium. | mapping in forest trees generally relies on outbred pedigrees in which genetic segregation is the result of meiotic recombination from both parents. the currently available mapping packages are not optimal for outcrossed pedigrees as they either cannot order phase-ambiguous data or only use pairwise information when ordering loci within linkage groups. a new package, outmap, has been developed for mapping codominant loci in outcrossed trees. a comparison of maps produced using linkage data from ... | 2002 | 12582629 |
| photosynthesis and antioxidant enzymes of phyllodes of acacia mangium. | physiological processes are influenced by environmental factors and plant characteristics. the distribution of photosynthetic capacity of phyllodes of acacia mangium willd. seedlings was studied in relation to the in vivo photosystem ii (psii) function, photosynthetic gas exchange, chlorophyll fluorescence and activities of antioxidant enzymes (superoxide dismutase (sod) and ascorbate peroxidase (apx)) of phyllodes at different positions on seedlings. there was a vertical gradient in photosynthe ... | 2000 | 11011098 |
| the phosphorus requirement of n2 -fixing and urea-fed acacia mangium. | the fast-growing leguminous tree acacia mangium willd, was grown for at least 22 wk in aerated solution culture either under n2 -fixing conditions or with 2 mmol urea per plant per wk. inorganic phosphorus was supplied at between 1 and 100 μmol p(1) per plant per wk: the latter was determined to be the optimum p supply for growth. the external p requirement for growth and the efficiency of utilization of internal p were similar for both n sources. however, shoot growth and the concentrations of ... | 1996 | 26763634 |
| a leaf phosphorus assay for seedlings of acacia mangium. | concentrations of extractable and total phosphorus in leaves, stem, root and nodules of 12-week-old seedlings of two provenances of acacia mangium willd. were analyzed to identify the fraction of phosphorus and the plant part most suitable for predicting the phosphorus nutritional status of the seedlings.for both provenances, concentrations of extractable phosphorus were more sensitive to changes in soil phosphorus status and varied less among different plant parts than concentrations of total p ... | 1992 | 14969954 |