Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| regeneration of plants from leaf explants of micropropagated clonal eucalyptus grandis. | callus production along with caulogenesis was obtained from leaf explants of micropropagated clonal eucalyptus grandis after six to twelve weeks of culture. out of eight clones tested, six were amenable to shoot production using simple media containing naphthaleneacetic acid and either 6-benzyladenine or zeatin. differences in growth regulator requirements for organogenesis were observed between different clones. these shoots were then elongated on a medium containing gibberellic acid and rooted ... | 1994 | 24194029 |
| vegetative propagation of adult eucalyptus grandis x urophylla and comparison of growth between micropropagated plantlets and rooted cuttings. | methods for the production of micropropagated plantlets and rooted cuttings were developed and used to vegetatively multiply adult eucalyptus grandis x urophylla. rooting success was less than 5% when cuttings excised from twigs of 3-year-old trees were used. the rooted cuttings were grown in the greenhouse as explant- or cutting-donors and maintained at a height of 30 to 100 cm by trimming back periodically. good rooting success (95%) of cuttings was obtained for epicormic shoots produced from ... | 1995 | 24185769 |
| use of random amplified polymorphic dna (rapd) markers in the discrimination and verification of genotypes in eucalyptus. | we carried out four separate studies using random amplified polymorphic dna (rapd) markers to analyse samples of eucalyptus supplied by several different organisations. the objective was to examine the reproducibility of the rapd technique and its ability to discriminate between individual genotypes for verification of clonal identities. we found that rapd profiles that are unique to a genotype can be generated reliably and simply and that even closely related genotypes can be distinguished. in ... | 1994 | 24177893 |
| [effects of eucalyptus grandis leaf litter at its early stage of decomposition on the growth and photosynthetic characteristics of cichorium intybus]. | from march to may, 2010, a pot experiment was conducted to investigate the effects of eucalyptus grandis leaf litter at its early stage of decomposition on the growth and photosynthetic characteristics of cichorium intybus. four treatments with different application rate of the leaf litter, i.e., 0 g x pot(-1) (ck), 30 g x pot(-1) (a1), 60 g x pot(-1) (a2), and 90 g x pot(-1) (a3), were installed. each pot contained 12 kg soil mixed with the leaf litter, and then, c. intybus was sown. the growth ... | 2013 | 24175509 |
| genetic mapping of qtls controlling vegetative propagation in eucalyptus grandis and e. urophylla using a pseudo-testcross strategy and rapd markers. | we have extended the combined use of the "pseudo-testcross" mapping strategy and rapd markers to map quantitative trait loci (qtls) controlling traits related to vegetative propagation in eucalyptus. qtl analyses were performed using two different interval mapping approaches, mapmaker-qtl (maximum likelihood) and qtl-stat (non-linear least squares). a total of ten qtls were detected for micropropagation response (measured as fresh weight of shoots, fws), six for stump sprouting ability (measured ... | 1995 | 24173047 |
| the tonoplast intrinsic aquaporin (tip) subfamily of eucalyptus grandis: characterization of egtip2, a root-specific and osmotic stress-responsive gene. | aquaporins have important roles in various physiological processes in plants, including growth, development and adaptation to stress. in this study, a gene encoding a root-specific tonoplast intrinsic aquaporin (tip) from eucalyptus grandis (named egtip2) was investigated. the root-specific expression of egtip2 was validated over a panel of five eucalyptus organ/tissues. in eucalyptus roots, egtip2 expression was significantly induced by osmotic stress imposed by peg treatment. histochemical ana ... | 2013 | 24157213 |
| ultra-high performance liquid chromatography coupled to mass spectrometry applied to the identification of valuable phenolic compounds from eucalyptus wood. | ultra-high performance liquid chromatography (uhplc) was applied for the first time in the analysis of wood extracts. the potential of this technique coupled to ion trap mass spectrometry in the rapid and effective detection and identification of bioactive components in complex vegetal samples was demonstrated. several dozens of compounds were detected in less than 30min of analysis time, corresponding to more than 3-fold reduction in time, when compared to conventional hplc analysis of similar ... | 2013 | 24055752 |
| assessment of cryptococcus albidus for biopulping of eucalyptus. | cryptococcus albidus shows delignification activity in nature. it was used for the biopulping of eucalyptus wood (eucalyptus grandis) to access its potential for industrial application in the pulp and paper industry. enzyme analysis on days 15, 30, and 60 showed the presence of laccase and xylanase as key enzymes. the production of endo-glucanase (cmcase) and exo-glucanase (fpase) was very low. scanning electron microscopy (sem) showed the surface colonization of wood and loosening of wood fiber ... | 2013 | 23876135 |
| dynamics of soil exploration by fine roots down to a depth of 10 m throughout the entire rotation in eucalyptus grandis plantations. | although highly weathered soils cover considerable areas in tropical regions, little is known about exploration by roots in deep soil layers. intensively managed eucalyptus plantations are simple forest ecosystems that can provide an insight into the belowground growth strategy of fast-growing tropical trees. fast exploration of deep soil layers by eucalypt fine roots may contribute to achieving a gross primary production that is among the highest in the world for forests. soil exploration by fi ... | 2013 | 23847645 |
| impact of decomposing cinnamomum septentrionale leaf litter on the growth of eucalyptus grandis saplings. | a pot experiment was performed to study the impact of decomposing cinnamomum septentrionale leaf litter on the growth of eucalyptus grandis saplings. the experimental design scheme was 0 (ck), 40 (a1), 80 (a2) and 120 g pot(-1) (a3) of e. grandis leaves, and changes in the volatile oil chemical composition during litter decomposition were assessed in the present study. the results showed that c. septentrionale leaf litter inhibited the growth of e. grandis saplings, as determined by the height, ... | 2013 | 23835358 |
| photosynthetic and anatomical responses of eucalyptus grandis leaves to potassium and sodium supply in a field experiment. | although vast areas in tropical regions have weathered soils with low potassium (k) levels, little is known about the effects of k supply on the photosynthetic physiology of trees. this study assessed the effects of k and sodium (na) supply on the diffusional and biochemical limitations to photosynthesis in eucalyptus grandis leaves. a field experiment comparing treatments receiving k (+k) or na (+na) with a control treatment (c) was set up in a k-deficient soil. the net co2 assimilation rates w ... | 2014 | 23663049 |
| effects of pretreatment on morphology, chemical composition and enzymatic digestibility of eucalyptus bark: a potentially valuable source of fermentable sugars for biofuel production - part 1. | in recent years, the growing demand for biofuels has encouraged the search for different sources of underutilized lignocellulosic feedstocks that are available in sufficient abundance to be used for sustainable biofuel production. much attention has been focused on biomass from grass. however, large amounts of timber residues such as eucalyptus bark are available and represent a potential source for conversion to bioethanol. in the present paper, we investigate the effects of a delignification p ... | 2013 | 23657132 |
| the identification and differential expression of eucalyptus grandis pathogenesis-related genes in response to salicylic acid and methyl jasmonate. | two important role players in plant defence response are the phytohormones salicylic acid (sa) and jasmonic acid (ja); both of which have been well described in model species such as arabidopsis thaliana. several pathogenesis related (pr) genes have previously been used as indicators of the onset of sa and ja signaling in arabidopsis. this information is lacking in tree genera such as eucalyptus. the aim of this study was to characterize the transcriptional response of pr genes (egrpr2, egrpr3, ... | 2013 | 23508356 |
| [pontoscolex corethrurus (annelidae: oligochaeta) soil quality indicator in eucalyptus grandis (myrtacea) sites with slash and burn management]. | soil burning has been used in agricultural and forestry systems as a fundamental technique to clean the land and add some nutrients to the soil. in addition, earthworms are known to promote various soil functions since they contribute to aeration and organic matter and nutrients availability to other soil organisms. this study evaluated the effects of tropical forest crops management with presence-absence of eucalyptus grandis on earthworm population in huimanquillo, tabasco, mexico. three sites ... | 2012 | 23342509 |
| 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 |
| reference genes for high-throughput quantitative reverse transcription-pcr analysis of gene expression in organs and tissues of eucalyptus grown in various environmental conditions. | interest in the genomics of eucalyptus has skyrocketed thanks to the recent sequencing of the genome of eucalyptus grandis and to a growing number of large-scale transcriptomic studies. quantitative reverse transcription-pcr (rt-pcr) is the method of choice for gene expression analysis and can now also be used as a high-throughput method. the selection of appropriate internal controls is becoming of utmost importance to ensure accurate expression results in eucalyptus. to this end, we selected 2 ... | 2012 | 23161857 |
| validation of reference genes from eucalyptus spp. under different stress conditions. | the genus eucalyptus consists of approximately 600 species and subspecies and has a physiological plasticity that allows some species to propagate in different regions of the world. eucalyptus is a major source of cellulose for paper manufacturing, and its cultivation is limited by weather conditions, particularly water stress and low temperatures. gene expression studies using quantitative reverse transcription polymerase chain reaction (qpcr) require reference genes, which must have stable exp ... | 2012 | 23148685 |
| induced somatic sector analysis of cellulose synthase (cesa) promoter regions in woody stem tissues. | the increasing focus on plantation forestry as a renewable source of cellulosic biomass has emphasized the need for tools to study the unique biology of woody genera such as eucalyptus, populus and pinus. the domestication of these woody crops is hampered by long generation times, and breeders are now looking to molecular approaches such as marker-assisted breeding and genetic modification to accelerate tree improvement. much of what is known about genes involved in the growth and development of ... | 2013 | 23132521 |
| thermal decomposition of wood: kinetics and degradation mechanisms. | the influence of wood components and cellulose crystallinity on the kinetic degradation of different wood species has been investigated using thermogravimetry. four wood species were studied: pinus elliottii (pie), eucalyptus grandis (eug), mezilaurus itauba (ita) and dipteryx odorata (dip). thermogravimetric results showed that higher extractive contents in the wood accelerate the degradation process and promote an increase in the conversion values at low temperatures. alternatively, the result ... | 2012 | 23073083 |
| land use change in a temperate grassland soil: afforestation effects on chemical properties and their ecological and mineralogical implications. | the current change in land use of grassland in the temperate region of south america is a process associated with the worldwide expansion of annual crops and afforestation with fast growing exotic species. this last cultivation has particularly been the subject of numerous studies showing its negative effects on soil (acidification, loss of organic matter and base cations, among others). however its effects on the mineral fraction are not yet known, as it is generally considered as one of the sl ... | 2012 | 23064181 |
| genomic characterization of dart markers based on high-density linkage analysis and physical mapping to the eucalyptus genome. | diversity arrays technology (dart) provides a robust, high throughput, cost-effective method to query thousands of sequence polymorphisms in a single assay. despite the extensive use of this genotyping platform for numerous plant species, little is known regarding the sequence attributes and genome-wide distribution of dart markers. we investigated the genomic properties of the 7,680 dart marker probes of a eucalyptus array, by sequencing them, constructing a high density linkage map and carryin ... | 2012 | 22984541 |
| an antimicrobial evaluation of plants used for the treatment of respiratory infections in rural maputaland, kwazulu-natal, south africa. | abundant availability of medicinal plants in the study area offers low cost health care, but scientific validation is needed in order to lend credibility to the traditional use against respiratory infections. | 2012 | 22960551 |
| enhancement of enzymatic digestibility of eucalyptus grandis pretreated by naoh catalyzed steam explosion. | naoh catalyzed steam explosion was applied to improve the enzymatic digestibility of eucalyptus grandis. the impregnation of wood chip with naoh solutions before steam explosion was carried out to investigate the effects of alkaline catalysis on solid recovery, enzymatic digestibility, and glucose recovery. the lignin removal was significantly affected by naoh as a catalyst and the glucose recovery increased with increased severity index. the use of naoh showed higher enzymatic digestibility tha ... | 2012 | 22939603 |
| removal of nitrogen and phosphorus by eucalyptus and populus at a tertiary treated municipal wastewater sprayfield. | various progenies of eucalyptus grandis and e. amplifolia, and clones of populus deltoides, were evaluated for plant removal of nitrogen (n) and phosphorus (p) for 26 months at a municipal waste spray field in north florida. tertiary treated wastewater containing 2.73 mg l(-1) nitrate n and 0.30 mg l(-1) total p was applied using sprinkler irrigation (93.8 m3 ha(-1) d(-1)) to fast growing trees utilized for bioenergy. eucalyptus amplifolia and e. grandis survived and grew very poorly as the resu ... | 2012 | 22908661 |
| genetic dissection of growth, wood basic density and gene expression in interspecific backcrosses of eucalyptus grandis and e. urophylla. | f1 hybrid clones of eucalyptus grandis and e. urophylla are widely grown for pulp and paper production in tropical and subtropical regions. volume growth and wood quality are priority objectives in eucalyptus tree improvement. the molecular basis of quantitative variation and trait expression in eucalypt hybrids, however, remains largely unknown. the recent availability of a draft genome sequence (http://www.phytozome.net) and genome-wide genotyping platforms, combined with high levels of geneti ... | 2012 | 22817272 |
| 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 |
| stand-level patterns of carbon fluxes and partitioning in a eucalyptus grandis plantation across a gradient of productivity, in sao paulo state, brazil. | wood production represents a large but variable fraction of gross primary production (gpp) in highly productive eucalyptus plantations. assessing patterns of carbon (c) partitioning (c flux as a fraction of gpp) between above- and belowground components is essential to understand mechanisms driving the c budget of these plantations. better knowledge of fluxes and partitioning to woody and non-woody tissues in response to site characteristics and resource availability could provide opportunities ... | 2012 | 22543478 |
| microarray analysis revealed upregulation of nitrate reductase in juvenile cuttings of eucalyptus grandis, which correlated with increased nitric oxide production and adventitious root formation. | the loss of rooting capability following the transition from the juvenile to the mature phase is a known phenomenon in woody plant development. eucalyptus grandis was used here as a model system to study the differences in gene expression between juvenile and mature cuttings. rna was prepared from the base of the two types of cuttings before root induction and hybridized to a dna microarray of e. grandis. in juvenile cuttings, 363 transcripts were specifically upregulated, enriched in enzymes of ... | 2012 | 22519851 |
| [effects of eucalyptus grandis leaf litter decomposition on the growth and photosynthetic characteristics of cichorium intybus]. | a pot experiment was conducted to study the effects of eucalyptus grandis leaf litter during its early stage decomposition on the growth and the photosynthesis of cichorium intybus. each pot contained 12 kg soil mixed with different amounts of e. grandis leaf litter (30 g x pot(-1), a1; 60 g x pot(-1), a2; 90 g x pot(-1), a3; and 0 g x pot(-1), ck), and sowed with c. intybus. the growth indicators and the photosynthetic characteristics of c. intybus were measured after the third leaf of c. intyb ... | 2012 | 22489472 |
| thermal decomposition of wood: influence of wood components and cellulose crystallite size. | the influence of wood components and cellulose crystallinity on the thermal degradation behavior of different wood species has been investigated using thermogravimetry, chemical analysis and x-ray diffraction. four wood samples, pinus elliottii (pie), eucalyptus grandis (eug), mezilaurus itauba (ita) and dipteryx odorata (dip) were used in this study. the results showed that higher extractives contents associated with lower crystallinity and lower cellulose crystallite size can accelerate the de ... | 2012 | 22306076 |
| do changes in carbon allocation account for the growth response to potassium and sodium applications in tropical eucalyptus plantations? | understanding the underlying mechanisms that account for the impact of potassium (k) fertilization and its replacement by sodium (na) on tree growth is key to improving the management of forest plantations that are expanding over weathered tropical soils with low amounts of exchangeable bases. a complete randomized block design was planted with eucalyptus grandis (w. hill ex maiden) to quantify growth, carbon uptake and carbon partitioning using a carbon budget approach. a combination of approac ... | 2011 | 22021011 |
| [decomposition of eucalyptus-alder mixed litters and dynamics of soil faunal community]. | in order to understand the decomposition characteristics of eucalyptus (eucalyptus grandis) -alder (alnus formosana) mixed litters and the roles of soil fauna in the decomposition process, litter samples of the two tree species were collected from the suji town of leshan, sichuan province, and mixed with different proportions. the mixtures were put in 6-, 30-, and 260-mesh litterbags to investigate their mass loss and the dynamics of soil faunal community during the process of decomposition. dif ... | 2011 | 21774303 |
| correspondence between performance of eucalyptus spp trees selected from family and clonal tests. | we examined the correspondence in performance between trees selected from a family test and their respective clones from a clonal test of eucalyptus. full-sib families were obtained from controlled pollination among individuals of eucalyptus grandis and between e. grandis and e. urophylla. the hybridizations did not follow a factorial scheme. the family tests were carried out at three locations in eun+ípolis and itabela counties, in bahia, brazil, in 2003. four hundred and ninety-seven high-perf ... | 2011 | 21732281 |
| mechanical stability of trees under dynamic loads. | tree stability in windstorms and tree failure are important issues in urban areas where there can be risks of damage to people and property and in forests where wind damage causes economic loss. current methods of managing trees, including pruning and assessment of mechanical strength, are mainly based on visual assessment or the experience of people such as trained arborists. only limited data are available to assess tree strength and stability in winds, and most recent methods have used a stat ... | 2006 | 21642099 |
| transpiration of urban forests in the los angeles metropolitan area. | despite its importance for urban planning, landscape management, and water management, there are very few in situ estimates of urban-forest transpiration. because urban forests contain an unusual and diverse mix of species from many regions worldwide, we hypothesized that species composition would be a more important driver of spatial variability in urban-forest transpiration than meteorological variables in the los angeles (california, usa) region. we used constant-heat sap-flow sensors to moni ... | 2011 | 21639035 |
| cloning and endogenous expression of a eucalyptus grandis udp-glucose dehydrogenase cdna. | udp-glucose dehydrogenase (ugdh) catalyzes the oxidation of udp-glucose (udp-glc) to udp-glucuronate (udp-glca), a key sugar nucleotide involved in the biosynthesis of plant cell wall polysaccharides. a full-length cdna fragment coding for ugdh was cloned from the cambial region of 6-month-old e. grandis saplings by rt-pcr. the 1443-bp-orf encodes a protein of 480 amino acids with a predicted molecular weight of 53 kda. the recombinant protein expressed in escherichia coli catalyzed the conversi ... | 2010 | 21637578 |
| characterization of a small cryptic plasmid from endophytic pantoea agglomerans and its use in the construction of an expression vector. | a circular cryptic plasmid named ppaga (2,734 bp) was isolated from pantoea agglomerans strain ege6 (an endophytic bacterial isolate from eucalyptus). sequence analysis revealed that the plasmid has a g+c content of 51% and contains four potential orfs, 238(a), 250(b), 131(c), and 129(d) amino acids in length without homology to known proteins. the shuttle vector plgm1 was constructed by combining the ppaga plasmid with pgfpmut3.0 (which harbors a gene encoding green fluorescent protein, gfp), a ... | 2011 | 21637551 |
| genetic control of eucalyptus urophylla and e. grandis resistance to canker caused by chrysoporthe cubensis. | chrysophorte cubensis induced canker occurs in nearly all tropical and subtropical regions where eucalypts are planted, causing losses in both wood quality and volume productivity, especially so in the warmer and more humid regions of brazil. the wide inter and intra-specific genetic variability of resistance to canker among eucalyptus species facilitates the selection of resistant plants. in this study, we evaluated resistance to this pathogen in five eucalyptus grandis (g) and 15 e. urophylla ... | 2010 | 21637427 |
| use of glass transition temperature for stabilization of board's cracks of eucalyptus grandis. | the eucalyptus grandis logs temperatures were determined and correlated with the board's cracks during steaming. thermocouples were inserted in the logs center, registering their temperatures during steaming at 90"c. the logs were sawed and the board's cracks measured. it was concluded that: (1) the logistic s-shaped curve explains the logs temperature variation; (2) the logs with diameter of 20 to <25, 25 to <30 and 30 to <35 cm presented, respectively, 84.2"c, 73.1"c and 45.8"c in the steaming ... | 2010 | 21562706 |
| insecticidal activity of essential oils from eleven eucalyptus spp. and two hybrids: lethal and sublethal effects of their major components on blattella germanica. | the aim of the current study was to evaluate the fumigant activity of the essential oils from 11 species of the genus eucalyptus and two of their hybrids on first instar of blattella germanica l. the fumigant activity and repellence of the four major monoterpene components of these essential oils also were tested. fumigant activity was evaluated by exposing nymphs to the vapors emitted by 50 microl of essential oil or monoterpene in a closed container. the lowest knockdown time 50% (kt50) values ... | 2011 | 21510210 |
| plants used for treating respiratory infections in rural maputaland, kwazulu-natal, south africa. | traditional remedies are frequently used in treating various respiratory ailments, and are very important in the primary health care of the people living in rural maputaland, kwazulu-natal, south africa. novel information gathered from surveys like the present study is important in preserving indigenous knowledge. | 2011 | 21497646 |
| a high-density transcript linkage map with 1,845 expressed genes positioned by microarray-based single feature polymorphisms (sfp) in eucalyptus. | abstract: | 2011 | 21492453 |
| glyphosate reduces urediniospore development and puccinia psidii disease severity on eucalyptus grandis. | recent studies have shown the effects of glyphosate drift on decreasing rust intensity on eucalyptus grandis plants. however, the effects of the herbicide on puccinia psidii initial development are unknown. in this study the systemic action of glyphosate on rust severity was evaluated on eucalyptus plants maintained under greenhouse conditions. urediniospore germination and apressorium formation on detached leaves and on water agar medium, previously treated with glyphosate, were also evaluated. | 2011 | 21370395 |
| [effects of fertilization level on diurnal variation of gas exchange of young eucalyptus grandis leaf]. | different levels (0, 90, 180, and 270 g per tree) of compound fertilizer containing 15% n, 15% p2o5, and 15% k2o were applied to young eucalyptus grandis to study the diurnal variations of its leaf stomatal conductance (gs), intercellular co2 concentration (ci), net photosynthesis rate (pn), transpiration rate (tr), water use efficiency (wue), and vapor pressure deficit on leaf surface (vpdl) as well as the variation of leaf chlorophyll content, aimed to approach the relationships of e. grandis ... | 2010 | 21360993 |
| population genetic analysis and phylogeny reconstruction in eucalyptus (myrtaceae) using high-throughput, genome-wide genotyping. | a set of over 8000 diversity arrays technology (dart) markers was tested for its utility in high-resolution population and phylogenetic studies across a range of eucalyptus taxa. small-scale population studies of eucalyptus camaldulensis, eucalyptus cladocalyx, eucalyptus globulus, eucalyptus grandis, eucalyptus nitens, eucalyptus pilularis and eucalyptus urophylla demonstrated the potential of genome-wide genotyping with dart markers to differentiate species, to identify interspecific hybrids a ... | 2011 | 21310251 |
| [community structure of soil fauna in eucalyptus grandis plantations at different slope locations]. | to understand the effects of slope location on the community structure of soil fauna in eucalyptus grandis plantation, an investigation was made on the soil fauna in 3 e. grandis plantations at different slope locations in the hilly area of sichuan province from january to october 2009. a total of 39,2762 individuals were observed, belonging to 146 groups, 7 phyla, 16 classes, and 31 orders. the community composition, trophic group, diversity, and seasonal dynamics of soil fauna in the plantatio ... | 2010 | 21265162 |
| new records of the cryphonectriaceae from southern africa including latruncellus aurorae gen. sp. nov. | the cryphonectriaceae accommodates some of the world's most important tree pathogens, including four genera known from native and introduced myrtales in africa. surveys in the past 3 y in southern africa have led to the discovery of cankers with fruiting structures resembling those of the cryphonectriaceae on trees in the myrtales in namibia, south africa, swaziland and zambia. these fungi were identified with morphological characteristics and dna sequence data. for the first time we report chry ... | 2011 | 21262988 |
| molecular weight distributions and linkages in lignocellulosic materials derivatized from ionic liquid media. | a novel and reproducible method is described for accurately determining the molecular weight distribution by size exclusion chromatography (sec) of whole lignocellulosic materials. this approach offers the opportunity to compare the molecular weight distributions of intact milled woods and its component fractions, lignins and holocelluloses, all from the same source, thus highlighting the potential of the technique and the contributions of the individual components to the chromatogram. the metho ... | 2011 | 21235206 |
| [rapid evaluation of ant diversity in land use systems in southern bahia, brazil]. | we aimed to compare the soil ant diversity in different land use systems from atlantic forest area, in southern bahia state, brazil. the ants were sampled in 16 sites: two primary forest sites (un-logged forest); three young secondary forests (<8 years old); three intermediate secondary forests (8-20 years old); three old secondary forests (>20 years old); three eucalyptus grandis plantations (3-7 years old), and two introduced pastures. each site was sampled in three sampling points 15 m apart, ... | 2010 | 20877979 |
| decay resistance of thermally-modified eucalyptus grandis wood at 140 degrees c, 160 degrees c, 180 degrees c, 200 degrees c and 220 degrees c. | the objective of this study was to evaluate the effect of thermal treatment on the biological resistance of eucalyptus grandis wood to the decay fungus picnoporus sanguineus. boards from 5 years and 11 months old e. grandis trees, taken from the stock possessed by the duratex-sa company, were thermally-modified at 140 degrees c, 160 degrees c, 180 degrees c, 200 degrees c and 220 degrees c in the laboratory of wood drying and preservation from unesp, botucatu, sp, brazil. samples of each treatme ... | 2010 | 20655200 |
| [effects of landscape structure and eucalyptus genotype on the abundance and biological control of glycaspis brimblecombei moore (hemiptera: psyllidae)]. | glycaspis brimblecombei moore is an australian native pest of eucalyptus detected in brazil in 2003. since then, it has spread fast and colonized plantations in several states of the country. this study aimed to investigate the influence of cerrado remnants on the abundance and biological control of g. brimblecombei. we placed yellow sticky card traps to capture insects in four plantations of hybrid clones of eucalyptus urophylla x eucalyptus grandis ('urograndis') and four plantations of e. uro ... | 2010 | 20305903 |
| identification of differentially expressed genes of the fungus hydnangium sp. during the pre-symbiotic phase of the ectomycorrhizal association with eucalyptus grandis. | the pre-symbiotic phase that precedes physical contact between symbionts is a crucial phase in determining their compatibility, allowing the formation of the ectomycorrhiza. a subtractive cdna library representing the differentially expressed genes of the fungus hydnangium sp. in the pre-symbiotic phase was constructed using fungal mycelia obtained through the in vitro mycorrhization technique. the fungus was cultured in the presence of eucalyptus grandis roots, but with no contact between the h ... | 2010 | 20177718 |
| effect of overexpression of radish plasma membrane aquaporins on water-use efficiency, photosynthesis and growth of eucalyptus trees. | eucalyptus is a diverse genus of flowering trees with more than 700 genotypic species which are mostly native to australia. we selected 19 wild provenances of eucalyptus camaldulensis grown in australia, compared their growth rate and drought tolerance and determined the protein levels of plasma membrane aquaporins (pips). there was a positive relationship between the drought tolerance and pip content. pips are divided into two subgroups, pip1 and pip2. most members of the pip2 subgroup, but not ... | 2010 | 20124554 |
| lumber quality of eucalyptus grandis as a function of diametrical position and log steaming. | the objective of this study was to evaluate the effect of log steaming and of the diametrical position of boards on the timber quality of eucalyptus grandis. logs with diameters between 20 and 25 cm, between 25 and 30 cm and between 30 and 35 cm were studied. half of logs were kept in its original condition, and the other half was steamed at 90 degrees c for 20 h. later, the logs were cut into flat saw boards, and defects due to growth stress relief were measured. the results show that: (1) boar ... | 2010 | 20007016 |
| two-step liquid hot water pretreatment of eucalyptus grandis to enhance sugar recovery and enzymatic digestibility of cellulose. | a two-step liquid hot water pretreatment (tslhw) was developed with the objective of achieving complete saccharification of both hemicellulose and cellulose of eucalyptus grandis, thereby avoiding the problems associated with the use of strong acid catalysts. the first step of the pretreatment was studied in the temperature range 180-200 degrees c, and the highest yield of total xylose achieved was 86.4% after 20 min at 180 degrees c. the second-step of the pretreatment was studied in the temper ... | 2010 | 20004094 |
| short-rotation woody crops for bioenergy and biofuels applications. | purpose-grown trees will be part of the bioenergy solution in the united states, especially in the southeast where plantation forestry is prevalent and economically important. trees provide a "living biomass inventory" with existing end-use markets and associated infrastructure, unlike other biomass species such as perennial grasses. the economic feasibility of utilizing tree biomass is improved by increasing productivity through alternative silvicultural systems, improved breeding and biotechno ... | 2009 | 19936031 |
| the influence of pulping and washing conditions on the properties of eucalyptus grandis unbleached kraft pulps treated with chelants. | the influence of different addition points of a chelating agent and a counter-ion exchange on the properties of eucalyptus grandis unbleached kraft pulps is studied. seven pulps were considered: two laboratory kraft pulps with or without the inclusion of the chelant dtpmpa (diethylene triamine penta (methylene phosphonic acid)), a mill kraft pulp and four mill pulps after ca(+2) or na(+) counter-ion exchange followed, or not, by washing with dtpmpa addition. the laboratory pulps required lower b ... | 2010 | 19880316 |
| use of biochar as bulking agent for the composting of poultry manure: effect on organic matter degradation and humification. | the aim of this study was to evaluate the use of biochar (produced by slow pyrolysis of eucalyptus grandis biomass) as bulking agent for the composting of poultry manure. three composting mixtures were prepared by the turned-pile system by mixing poultry manure with different organic wastes used as bulking agent (biochar, coffee husk and sawdust) in a proportion of 1:1 (fresh weight). despite the inert nature of biochar, the composting mixture prepared with biochar underwent an organic matter de ... | 2010 | 19796932 |
| in situ determination of lignin phenolics and wood solubility in imidazolium chlorides using (31)p nmr. | corn stover, norway spruce, and eucalyptus grandis were pulverized to different degrees. these samples were subjected to quantitative analyses, upon the basis of predissolution into the imidazolium chloride-based ionic liquids [amim]cl and [bnmim]cl followed by labeling of hydroxyl groups as phosphite esters and quantitative (31)p nmr analysis. analysis of different pulverization degrees provided semiempirical data to chart the solubility of norway spruce in these ionic liquids. further method r ... | 2009 | 19754164 |
| an accurate and non-labor intensive method for the determination of syringyl to guaiacyl ratio in lignin. | the syringyl to guaiacyl (s:g) ratio of hardwood lignin has long been identified as a significant parameter in delignification processes and more recent results have shown that it is also important in determining the amount of ethanol that can be obtained from fermentation of hydrolyzed wood. acidolysis of klason or acid insoluble lignin in dioxane/water/hcl was being investigated when syringyl and guaiacyl nuclei with a diketone-containing sidechain were observed as the major products. the area ... | 2009 | 19576762 |
| a microarray-based method for the parallel analysis of genotypes and expression profiles of wood-forming tissues in eucalyptus grandis. | fast-growing eucalyptus grandis trees are one of the most efficient producers of wood in south africa. the most serious problem affecting the quality and yield of solid wood products is the occurrence of end splitting in logs. selection of e. grandis planting stock that exhibit preferred wood qualities is thus a priority of the south african forestry industry. we used microarray-based dna-amplified fragment length polymorphism (aflp) analysis in combination with expression profiling to develop f ... | 2009 | 19473481 |
| energy product options for eucalyptus species grown as short rotation woody crops. | eucalyptus species are native to australia but grown extensively worldwide as short rotation hardwoods for a variety of products and as ornamentals. we describe their general importance with specific emphasis on existing and emerging markets as energy products and the potential to maximize their productivity as short rotation woody crops. using experience in florida usa and similar locations, we document their current energy applications and assess their productivity as short-term and likely lon ... | 2008 | 19325808 |
| influence of nitrogen and potassium fertilization on leaf lifespan and allocation of above-ground growth in eucalyptus plantations. | eucalyptus grandis (w. hill ex maiden) leaf traits and tree growth were studied over 3 years after the establishment of two adjacent complete randomized block designs in southern brazil. in a nitrogen (n) input experiment, a treatment with the application of 120 kg n ha(-1) was compared to a control treatment without n addition, and in a potassium (k) input experiment a control treatment without k addition was compared to a treatment with the application of 116 kg k ha(-1). young leaves were tag ... | 2009 | 19203937 |
| [physiological bases of herbages shade-tolerance in eucalyptus grandis and herbage inter-cultivated system]. | the study on the physiological bases of the shade-tolerance of dactylis glomerata, lolium perenne, and hemarthria compressa inter-cultivated in eucalyptus grandis forests with different canopy densities showed that with increasing canopy density, the light saturation point (lsp), light compensation point (lcp), chlorophyll a/b (chla/chlb), and the contents of proline (pro), soluble sugar (ss) and soluble protein (sp) of the three herbages decreased gradually, but the apparent quantum yield (aqy) ... | 2008 | 19102302 |
| high-throughput gene and snp discovery in eucalyptus grandis, an uncharacterized genome. | benefits from high-throughput sequencing using 454 pyrosequencing technology may be most apparent for species with high societal or economic value but few genomic resources. rapid means of gene sequence and snp discovery using this novel sequencing technology provide a set of baseline tools for genome-level research. however, it is questionable how effective the sequencing of large numbers of short reads for species with essentially no prior gene sequence information will support contig assembli ... | 2008 | 18590545 |
| eucalyptus applied genomics: from gene sequences to breeding tools. | eucalyptus is the most widely planted hardwood crop in the tropical and subtropical world because of its superior growth, broad adaptability and multipurpose wood properties. plantation forestry of eucalyptus supplies high-quality woody biomass for several industrial applications while reducing the pressure on tropical forests and associated biodiversity. this review links current eucalypt breeding practices with existing and emerging genomic tools. a brief discussion provides a background to mo ... | 2008 | 18537893 |
| main lepidopteran pest species from an eucalyptus plantation in minas gerais, brazil. | lepidoptera species were monitored in a plantation of eucalyptus grandis in the municipality of bom despacho, state of minas gerais, brazil from march 1987 to february 1992. a total of 547 species were collected and divided in: primary pests: 13; secondary pests: 20; species without defined importance to eucalyptus: 79; and non-identified species: 435. these four groups had a mean of 5231.29; 338.18; 438.16 and 2222.87 individuals with a total of 8229.87 individuals collected per trap. the numbe ... | 2006 | 18494322 |
| methyl jasmonate does not induce changes in eucalyptus grandis leaves that alter the effect of constitutive defences on larvae of a specialist herbivore. | the up-regulation of secondary metabolic pathways following herbivore attack and the subsequent reduction in herbivore performance have been identified in numerous woody plant species. eucalypts constitutively express many secondary metabolites in the leaves, including terpenes and formylated phloroglucinol compounds (fpcs). we used clonal ramets from six clones of eucalyptus grandis and two clones of e. grandis x camaldulensis to determine if methyl jasmonate (meja) treatment could induce chang ... | 2008 | 18481100 |
| genetic mapping in eucalyptus urophylla and eucalyptus grandis using rapd markers. | two single-tree linkage maps were constructed for eucalyptus urophylla and eucalyptus grandis, based on the segregation of 480 random amplified polymorphic dna (rapd) markers in a f1 interspecific progeny. a mixture of three types of single-locus segregations were observed: 244 1:1 female, 211 1:1 male, and 25 markers common to both, segregating 3:1. markers segregating in the 1:1 ratio (testcross loci) were used to establish separate maternal and paternal maps, while markers segregating in the ... | 1996 | 18469954 |
| sage transcript profiling of the juvenile cambial region of eucalyptus grandis. | despite the importance of eucalyptus spp. in the pulp and paper industry, functional genomic approaches have only recently been applied to understand wood formation in this genus. we attempted to establish a global view of gene expression in the juvenile cambial region of eucalyptus grandis hill ex maiden. the expression profile was obtained from serial analysis of gene expression (sage) library data produced from 3- and 6-year-old trees. fourteen-base expressed sequence tags (ests) were searche ... | 2008 | 18381271 |
| glyphosate applied at low doses can stimulate plant growth. | glyphosate blocks the shikimic acid pathway, inhibiting the production of aromatic amino acids and several secondary compounds derived from these amino acids. non-target plants can be exposed to low doses of glyphosate by herbicide drift of spray droplets and contact with treated weeds. previous studies have reported that low doses of glyphosate stimulate growth, although these data are very limited. the objective of this study was to determine the effects of low glyphosate doses on growth of a ... | 2008 | 18293284 |
| differential expression of three eucalyptus secondary cell wall-related cellulose synthase genes in response to tension stress. | trees constitute the majority of lignocellulosic biomass existing on our planet. trees also serve as important feedstock materials for various industrial products. however, little is known about the regulatory mechanisms of cellulose synthase (cesa) genes of trees. here, the cloning and characterization of three cesa genes (egracesa1, egracesa2, and egracesa3) from an economically important tree species, eucalyptus grandis, are reported. all three genes were specifically expressed in xylem cells ... | 2008 | 18281718 |
| interspecific hybridization of eucalyptus as a potential tool to improve the bioactivity of essential oils against permethrin-resistant head lice from argentina. | the essential oils extracted from eucalyptus grandis, eucalyptus camaldulensis, eucalyptus tereticornis, and the hybrids e. grandisxe. camaldulensis, and e. grandisxe. tereticornis were analyzed by gc-ms, and evaluated for their fumigant and repellent effects on permethrin-resistant head lice. fumigant activity of both hybrids was higher than that for pure species. e. grandisxe. tereticornis and e. grandisxe. camaldulensis showed kt50 values of 12.99 and 13.63min, respectively. e. grandis, e. ca ... | 2008 | 18261899 |
| weak chemiluminescence emission during base induced rearrangement of g-factors. | a rearrangement in basic medium of the natural endoperoxide g3-factor extracted from eucalyptus grandis is described. evidence to support a 1,2-dioxetane intermediate that decomposes with weak luminescence emission (quantum yield) is presented. | 2008 | 18219413 |
| larvicidal effect of eucalyptus grandis essential oil and turpentine and their major components on aedes aegypti larvae. | in the search for new alternatives for the control of aedes aegypti the larvicidal activity of eucalyptus grandis essential oil and pine resin essential oil (turpentine) and their major components (alpha- and beta-pinene and 1,8-cineole) was determined. gas chromatography-mass spectroscopy analysis of e. grandis essential oil revealed that its major components are alpha-pinene and 1,8-cineole. similar analysis of turpentine obtained by distillation of the resin pitch of conifers showed that alph ... | 2007 | 17939510 |
| is eucalyptus cryptically self-incompatible? | the probability that seeds will be fertilized from self- versus cross-pollen depends strongly on whether plants have self-incompatibility systems, and how these systems influence the fate of pollen tubes. | 2007 | 17881341 |
| proteomic analysis of the cambial region in juvenile eucalyptus grandis at three ages. | recent advances in genomics and proteomics have provided an excellent opportunity to understand complex biological processes such as wood formation at the gene and protein levels. the aim of this work was to describe the proteins participating in the processes involved in juvenile wood formation by isolating proteins from the cambial region of eucalyptus grandis, at three ages of growth (6-month-old seedlings, 3- and 6-year-old trees), and also to identify proteins differentially expressed. usin ... | 2007 | 17533644 |
| [distribution pattern of meso-micro soil fauna in eucalyptus grandis plantation]. | in this paper, meso-micro soil fauna were extracted and collected by baermann's and tullgren' s method, and their distribution pattern in the eucalyptus grandis plantation of hongya county, sichuan province was studied. a total of 13 550 specimens were collected, belonging to 6 phyla, 13 classes, and 26 orders. acarina, nematoda, collembola were the dominant groups, and enchytraeidae was the frequent one. the group and individual numbers of meso-micro soil fauna varied with seasons, being the ma ... | 2006 | 17330474 |
| temperature effects on wood anatomy, wood density, photosynthesis and biomass partitioning of eucalyptus grandis seedlings. | wood density, a gross measure of wood mass relative to wood volume, is important in our understanding of stem volume growth, carbon sequestration and leaf water supply. disproportionate changes in the ratio of wood mass to volume may occur at the level of the whole stem or the individual cell. in general, there is a positive relationship between temperature and wood density of eucalypts, although this relationship has broken down in recent years with wood density decreasing as global temperature ... | 2007 | 17241967 |
| 13c-nmr study of the ruthenium(ii)-catalyzed degradation of labeled g-factor endoperoxides: proposal of a likely biogenetic pathway and evidence for co2 release. | g-factor endoperoxides are natural products acting as phytohormones and contribute to root inhibition and frost resistance in eucalyptus grandis and other myrtaceae. several (z)- and (e)-configured cyclopentane-1,3-dione metabolites of g-factors have been found in some eucalyptus extracts. interestingly, these probable metabolites are identical to the products obtained by ru(ii)-catalyzed reduction of g-factors. in the present work, we, thus, studied the mechanism involved in the formation of th ... | 2006 | 17193272 |
| boron impregnation treatment of eucalyptus grandis wood. | eucalyptus grandis is suitable for small timber purposes, but its wood is reported to be non-durable and difficult to treat. boron compounds being diffusible, and the vacuum-pressure impregnation (vpi) method being more suitable for industrial-scale treatment, the possibility of boron impregnation of partially dry to green timber was investigated using a 6% boric acid equivalent (bae) solution of boric acid and borax in the ratio 1:1.5 under different treatment schedules. it was found that e. gr ... | 2007 | 17046244 |
| aurapex penicillata gen. sp. nov. from native miconia theaezans and tibouchina spp. in colombia. | conidiomata of a fungus resembling chrysoporthe cubensis, a serious canker pathogen of eucalyptus spp. (myrtaceae, myrtales) in tropical and subtropical parts of the world, was found on eucalyptus grandis in colombia. fruiting structures of the fungus could be distinguished from those of c. cubensis by their distinctly orange conidiomatal necks. this fungus also was found on several plant species native to colombia including tibouchina urvilleana, t. lepidota and miconia theaezans (melastomatace ... | 2006 | 16800308 |
| effects of g, a growth regulator from eucalyptus grandis, on photosynthesis. | a growth regulator (g; 4-ethyl-1-hydroxy-4,8,8,10,10 pentamethyl-7,9-dioxo-2,3 dioxyabicyclo (4.4.0) decene-5) from eucalyptus grandis (maiden) reduced stomatal conductance and also photosynthetic capacity when fed through the transpiration stream of detached leaves. the concentration of g required for this effect was high (10(-4) molar), but the amount of g taken up (dose) was below the level which has previously been found in e. grandis leaves. similar effects were observed in detached leaves ... | 1982 | 16662322 |
| optimization of acid hydrolysis from the hemicellulosic fraction of eucalyptus grandis residue using response surface methodology. | biotechnological conversion of biomass into fuels and chemicals requires hydrolysis of the polysaccharide fraction into monomeric sugars. hydrolysis can be performed enzymatically and with dilute or concentrate mineral acids. the present study used dilute sulfuric acid as a catalyst for hydrolysis of eucalyptus grandis residue. the purpose of this paper was to optimize the hydrolysis process in a 1.4 l pilot-scale reactor and investigate the effects of the acid concentration, temperature and res ... | 2007 | 16473004 |
| six new cellulose synthase genes from eucalyptus are associated with primary and secondary cell wall biosynthesis. | higher plants contain a family of cellulose synthase catalytic subunit (cesa) genes that encode components of an enzyme complex embedded in the cell membrane. recent studies in several higher plant species have demonstrated that two groups of cesa genes exist, associated with either primary or secondary cell wall deposition. we cloned six full-length cesa cdnas from eucalyptus grandis w. hill ex maiden (egcesa1 through 6) and determined their expression patterns in a variety of organs from an ad ... | 2006 | 16452068 |
| quantitative characterization of a hardwood milled wood lignin by nuclear magnetic resonance spectroscopy. | the structure of eucalyptus grandis milled wood lignin (mwl) was investigated by 2d 1h-13c hsqc, hmqc, and 1h-1h tocsy correlation nmr techniques and by quantitative 13c nmr as well as by the permanganate oxidation degradation technique. the combination of 2d nmr and quantitative 13c nmr spectroscopy of nonacetylated and acetylated lignin preparations allowed reliable identification and calculation of the amount of different lignin structures. about 85% of side-chain moieties were estimated on t ... | 2005 | 16332110 |
| relationship between density and ultrasonic velocity in brazilian tropical woods. | in this study, the effect of density on the velocity of an ultrasonic wave in wood is investigated. the aim of the present study was to analyze the influence of density on the longitudinal velocity of an ultrasonic wave, propagated in the longitudinal direction. experiments were conducted on 5cm x 5cm x 5cm wood specimens selected from the following species: pinus caribea (pinus caribea var. caribea), eucalyptus citriodora (eucalyptus citriodora), eucalyptus grandis (eucalyptus grandis), cupiúba ... | 2006 | 16311030 |
| [ecological distribution patterns of soil microbes under artificial eucalyptus grandis stand]. | in order to find out the ecological distribution patterns of soil microbes under artificial eucalyptus grandis stand, the amount and distribution of soil bacteria, fungi and actinomycetes in hongya county of sichuan province were investigated in 2004. the results showed that soil microbial population under eucalyptus grandis stand varied with seasons, being the maximum in autumn, fewer in spring, and the minimum in summer. the numbers were decreased in order of bacteria > actinomycetes > fungi, ... | 2005 | 16262052 |
| why does phosphorus limitation increase wood density in eucalyptus grandis seedlings? | wood density influences both the physiological function and economic value of tree stems. we examined the relationship between phosphorus (p) supply and stem wood density of eucalyptus grandis hill ex maiden seedlings grown with varying soil p additions and determined how changes in wood anatomy and biomass partitioning affect the relationship. plant height, stem diameter and total biomass increased by 400-500% with increasing p supply. stem wood density decreased sharply from 520 to 380 kg m(-3 ... | 2006 | 16203712 |
| egmyb2, a new transcriptional activator from eucalyptus xylem, regulates secondary cell wall formation and lignin biosynthesis. | summary egmyb2, a member of a new subgroup of the r2r3 myb family of transcription factors, was cloned from a library consisting of rna from differentiating eucalyptus xylem. egmyb2 maps to a unique locus on the eucalyptus grandis linkage map and co-localizes with a quantitative trait locus (qtl) for lignin content. recombinant egmyb2 protein was able to bind specifically the cis-regulatory regions of the promoters of two lignin biosynthetic genes, cinnamoyl-coenzyme a reductase (ccr) and cinnam ... | 2005 | 16098109 |
| power of microsatellite markers for fingerprinting and parentage analysis in eucalyptus grandis breeding populations. | we report the genetic analysis of 192 unrelated individuals of an elite breeding population of eucalyptus grandis (hill ex maiden) with a selected set of six highly polymorphic microsatellite markers developed for species of the genus eucalyptus. a full characterization of this set of six loci was carried out generating allele frequency distributions that were used to estimate parameters of genetic information content of these loci, including expected heterozygosity, polymorphism information con ... | 2004 | 15601907 |
| phenol adsorption onto powdered and granular activated carbon, prepared from eucalyptus wood. | eucalyptus grandis sawdust, a major waste from the growing uruguayan wood industry, was used in previous work to prepare powdered activated carbon (pac). in the present work, granular activated carbon (gac) was prepared by mixing pac, carboxymethyl cellulose as a binder, and kaolin as reinforcer. ultimate analysis and surface characterization of gac and pac were performed. phenol adsorption was used as a way to compare the characteristics of different pac and gac preparations. kinetics and isoth ... | 2004 | 15464799 |
| responses of eucalypt species to aluminum: the possible involvement of low molecular weight organic acids in the al tolerance mechanism. | aluminum (al) tolerance mechanisms in crop plants have been extensively researched, but our understanding of the physiological mechanisms underlying al tolerance in trees is still limited. to investigate al tolerance in eucalypts, seedlings of six species (eucalyptus globulus labill., eucalyptus urophylla s.t. blake, eucalyptus dunnii maiden, eucalyptus saligna sm., eucalyptus cloeziana f. j. muell. and eucalyptus grandis w. hill ex maiden) and seedlings of six clones of eucalyptus species were ... | 2004 | 15339736 |
| coordinated genetic regulation of growth and lignin revealed by quantitative trait locus analysis of cdna microarray data in an interspecific backcross of eucalyptus. | phenotypic, genotypic, and transcript level (microarray) data from an interspecific backcross population of eucalyptus grandis and eucalyptus globulus were integrated to dissect the genetic and metabolic network underlying growth variation. transcript abundance, measured for 2,608 genes in the differentiating xylem of a 91 (e. grandis x e. globulus) x e. grandis backcross progeny was correlated with diameter variation, revealing coordinated down-regulation of genes encoding enzymes of the lignin ... | 2004 | 15299141 |
| development and assessment of microarray-based dna fingerprinting in eucalyptus grandis. | development of improved eucalyptus genotypes involves the routine identification of breeding stock and superior clones. currently, microsatellites and random amplified polymorphic dna markers are the most widely used dna-based techniques for fingerprinting of these trees. while these techniques have provided rapid and powerful fingerprinting assays, they are constrained by their reliance on gel or capillary electrophoresis, and therefore, relatively low throughput of fragment analysis. in contra ... | 2004 | 15290050 |
| nutrient accumulation in trees and soil following irrigation with municipal effluent in australia. | irrigation of tree crops is being evaluated as a method of land disposal of municipal effluent in australia. a study was carried out from 1980-84 in which seven tree species were sprinkler-irrigated with effluent at an annual rate of 1191-1752 mm. effective weed control and frequent irrigation resulted in good survival of all species (range 83-100%) at 12 months. total productivity was estimated at age 4 years by measuring biomass of each species inclusive of litter and roots to a soil depth of ... | 1990 | 15092326 |
| genetics of postzygotic isolation in eucalyptus: whole-genome analysis of barriers to introgression in a wide interspecific cross of eucalyptus grandis and e. globulus. | the genetic architecture of hybrid fitness characters can provide valuable insights into the nature and evolution of postzygotic reproductive barriers in diverged species. we determined the genome-wide distribution of barriers to introgression in an f(1) hybrid of two eucalyptus tree species, eucalyptus grandis (w. hill ex maiden.) and e. globulus (labill.). two interspecific backcross families (n = 186) were used to construct comparative, single-tree, genetic linkage maps of an f(1) hybrid indi ... | 2004 | 15082559 |
| retrospective selection of elite parent trees using paternity testing with microsatellite markers: an alternative short term breeding tactic for eucalyptus. | the conventional way to drive modifications in old forest tree seed orchards is to establish progeny trials involving each parent tree and then evaluate its contribution to the performance of the progeny by estimating its general and specific combining ability (gca and sca). in this work, we successfully applied an alternative parent selection tactic based on paternity testing of superior offspring derived from a hybrid seed orchard established with a single eucalyptus grandis seed parents and s ... | 2004 | 15004676 |
| leaf phosphorus and nitrogen concentrations and net photosynthesis in eucalyptus seedlings. | seedlings of eucalyptus grandis hill ex maiden, e. pilularis smith and e. gummifera (sol. ex gaertner) hochr. were grown in solution culture with 100 micromol phosphorus (p). after eight weeks, half of the seedlings were transferred to solution cultures containing 1 micromol p. after a further four weeks, growth, net photosynthesis and foliar p and nitrogen (n) concentrations were measured. the seeds of e. grandis came from a relatively fertile site and those of the other two species from phosph ... | 1989 | 14972983 |
| drought tolerance, growth partitioning and vigor in eucalypt seedlings and rooted cuttings. | to clarify the physiological basis of productivity differences among rooted cuttings and seedlings of eucalypt species, relationships between morphology and water relations were examined in 4-month-old seedlings of eucalyptus grandis w. hill ex maiden, e. urophylla s.t. blake and e. cloeziana f. muell. and in 4-month-old rooted cuttings of three e. grandis cultivars. four-month-old seedlings had greater dry weights, lower leaf area/root dry weight (la/rdw) ratios and lower shoot/root dry weight ... | 1988 | 14972803 |