Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| root adaptation and nitrogen source acquisition in natural ecosystems. | the capacity for nitrate reduction, as measured by nitrate reductase activity (nra), was generally low for a range of plant communities in australia (coastal heathland, rainforest, savanna woodland, monsoon forest, mangrove, open eucalyptus forest, coral cay open forest) and only a loose relationship existed between nra and leaf nitrogen concentration. this suggests that nitrate ions are not the sole nitrogen source in these communities. based on (15)n labeling experiments, we found a range of t ... | 1996 | 14871787 |
| response of eucalyptus grandis trees to soil water deficits. | the use of potential transpiration models to simulate transpiration rates in areas prone to soil water deficits leads to overestimates of water use as the soil dries. therefore, i carried out studies on eucalyptus grandis w. hill ex maiden trees subjected to soil drying at two field sites in the mpumalanga province of south africa to determine the relation between transpiration rate and soil water availability. i hypothesized that, with this relationship defined, simple modeling of the soil wate ... | 1996 | 14871767 |
| growth and water use of eucalyptus grandis and pinus radiata plantations irrigated with effluent. | we studied the growth and water balance of young plantations of pinus radiata d. don and eucalyptus grandis w. hill ex maiden irrigated with effluent for 3 years in a climate of high net evaporation. the plantations were irrigated weekly with secondary-treated municipal effluent at the estimated water-use rate, or at nominally twice or half this rate. control plots were irrigated with bore water at their estimated water-use rate. both species grew rapidly when irrigated with either effluent or b ... | 1996 | 14871765 |
| interactive effects of atmospheric carbon dioxide and leaf nitrogen concentration on canopy light use efficiency: a modeling analysis. | potential increases in plant productivity in response to increasing atmospheric co(2) concentration are likely to be constrained by nutrient limitations. however, the interactive effects of nitrogen nutrition and co(2) concentration on growth are difficult to define because both factors affect several aspects of growth, including photosynthesis, respiration, and leaf area. by expressing growth as a product of light intercepted and light use efficiency (epsilon), it is possible to decouple the ef ... | 1996 | 14871764 |
| dry mass allocation, water use efficiency and delta(13)c in clones of eucalyptus grandis, e. grandis x camaldulensis and e. grandis x nitens grown under two irrigation regimes. | clonal variation in water use efficiency (wue), dry mass accumulation and allocation, and stable carbon isotope ratio (delta(13)c) of crude leaf fiber extracts was determined in six clones of eucalyptus grandis w. hill ex maiden. grown for 16 months in field lysimeters in two soil water regimes. the relationships between delta(13)c and wue calculated on the basis of leaf, harvestable stem, shoot and whole-plant dry mass accumulation were investigated. there was no clonal variation in dry mass ac ... | 1996 | 14871719 |
| resistance to rust ( puccinia psidii winter) in eucalyptus: mode of inheritance and mapping of a major gene with rapd markers. | rust is one of the most-damaging eucalypt diseases in brazil and is considered a potential threat to eucalypt plantations worldwide. to determine the mode of inheritance of resistance in the eucalyptus grandis- puccinia psidii pathosystem, ten full-sib families, generated from crosses between susceptible and resistant trees, were inoculated with a single-pustule isolate of the pathogen and rust severity was scored. the observed segregation ratios in segregating families suggested major gene cont ... | 2003 | 14504745 |
| an efficient procedure to stably introduce genes into an economically important pulp tree (eucalyptus grandis x eucalyptus urophylla). | regeneration problems are one of the main limitations preventing the wider application of genetic engineering strategies to the genus eucalyptus. seedlings from eucalyptus grandis x eucalyptus urophylla were selected according to their regeneration (adventitious organogenesis) and transformation capacity. after in vitro cloning, the best genotype of 250 tested was transformed via agrobacterium tumefaciens. a cinnamyl alcohol dehydrogenase (cad) antisense cdna from eucalyptus gunnii was transferr ... | 2003 | 12885162 |
| comparative genetic linkage maps of eucalyptus grandis, eucalyptus globulus and their f1 hybrid based on a double pseudo-backcross mapping approach. | comparative genetic mapping in interspecific pedigrees presents a powerful approach to study genetic differentiation, genome evolution and reproductive isolation in diverging species. we used this approach for genetic analysis of an f(1) hybrid of two eucalyptus tree species, eucalyptus grandis (w. hill ex maiden.) and eucalyptus globulus (labill.). this wide interspecific cross is characterized by hybrid inviability and hybrid abnormality. approximately 20% of loci in the genome of the f(1) hyb ... | 2003 | 12838392 |
| gene flow estimation with microsatellites in a malagasy seed orchard of eucalyptus grandis. | eucalyptus grandis has a mixed-mating reproductive system. malagasy eucalyptus seed orchards were established 15 years ago with two aims both based on panmixia: open-pollinated seed production and genetic improvement. the panmixia hypothesis has never been confirmed in the seed orchard. from a seedling seed-orchard stand comprising 349 trees and using data obtained with six selected microsatellite markers, paternity analysis was performed for 724 offspring collected on 30 adult trees. paternity ... | 2003 | 12750775 |
| a pcr/rflp technique to characterize fungal species in eucalyptus grandis hill ex. maiden ectomycorrhizas. | with the increasing awareness of the significance of mycorrhizas, research is focusing on studies to elucidate the contribution of the symbiosis to ecosystem dynamics. in this sense, molecular biology has acquired great significance. pcr/rflp techniques were adapted to characterize ectomycorrhizal fungi associated with eucalyptus grandis. the its region of the fungal rdna from pure cultures and from of mycorrhizas synthesized in vitro was amplified. primers nsa3/nlc2 were used followed by a nest ... | 2003 | 12682832 |
| fractionation of eucalyptus grandis chips by dilute acid-catalysed steam explosion. | steam explosion of eucalyptus grandis has been carried out under various pretreatment conditions (200-210 degrees c, 2-5 min) after impregnation of the wood chips with 0.087 and 0.175% (w/w) h2so4. this study, arranged as a 2(3) factorial design, indicated that pretreatment temperature is the most critical variable affecting the yield of steam-treated fractions. pretreatment of 0.175% (w/w) h2so4-impregnated chips at 210 degrees c for 2 min was the best condition for hemicellulose recovery (most ... | 2003 | 12653274 |
| a comparison of heat pulse and deuterium tracing techniques for estimating sap flow in eucalyptus grandis trees. | sap flow rates were measured simultaneously by the heat pulse and deuterium tracing techniques in nine eucalyptus grandis w. hill ex maiden. trees at two sites (1) to compare results from the two techniques and (2) to assess the impact of the assumptions underlying the deuterium tracing method on the calculation of sap flow for a range of tree sizes. the trees ranged in height from 4 to 14 m with leaf areas of 5 to 35 m(2). in all trees, sap flow estimated by the deuterium tracing technique was ... | 1998 | 12651419 |
| response of effluent-irrigated eucalyptus grandis and pinus radiata to salinity and vapor pressure deficits. | effects of high vapor pressure deficit (vpd) and soil salinity on growth and physiology of pinus radiata d. don and eucalyptus grandis hill ex maiden were studied in a five-year-old plantation irrigated with salt-enhanced effluent (2.2 ds m(-1)) or freshwater (0.2 ds m(-1)) for 14 weeks during spring and summer. salt was then rapidly leached by over-irrigation with low-salinity effluent. soil water and salinity, tree water stress, sap flux, substrate carbon conversion efficiency, foliage and ste ... | 1998 | 12651343 |
| transpiration and canopy conductance in a eucalypt plantation using shallow saline groundwater. | tree water use and canopy conductance were monitored in a 20-year-old eucalyptus grandis w. hill ex maiden and eucalyptus camaldulensis dehnh. plantation shown to be using shallow saline groundwater. annual water use, obtained from two years of heat pulse measurements of daily water use, was approximately 300 mm for both species with a winter minimum and a weak maximum in spring. canopy conductance obtained from the ratio of daily water use to daily mean vapor pressure deficit (vpd) was low duri ... | 1998 | 12651341 |
| age-age and trait-trait correlations for eucalyptus grandis hill ex maiden and their implications for optimal selection age and design of clonal trials. | previous results from seven locations of eucalyptus grandis clonal trials in colombia supported the a priori contention of sub-dividing them into three different environmental zones for testing and deployment. within these zones, the determination of age-age genetic correlations for both height and mean annual increment (mai) showed that strong age-age correlations are present for a rotation age of 6 years starting at 3 years age and, thereafter, suggesting this age as appropriate for selection. ... | 2003 | 12596004 |
| conservation and synteny of ssr loci and qtls for vegetative propagation in four eucalyptus species. | conservation of microsatellite loci, heterozygous in eucalyptus grandis, eucalyptus urophylla, eucalyptus tereticornis and eucalyptus globulus, allowed us to propose homeologies among genetic linkage groups in these species, supported by at least three ssr loci in two different linkage groups. marker-trait associations for sprouting and adventitious rooting ability were also compared in the four species. putative quantitative trait loci (qtls) influencing vegetative propagation traits were locat ... | 2002 | 12582553 |
| xylan-hydrolyzing enzyme system from bacillus pumilus cbmai 0008 and its effects on eucalyptus grandis kraft pulp for pulp bleaching improvement. | the extracellular productions of beta-xylanase, beta-xylosidase, beta-glucosidase, beta-mannanase, arabinosidase, alpha-glucuronidase, alpha-galactosidase and fpase from bacillus pumilus cbmai 0008 were investigated with three different xylan sources as substrate. the enzymatic profiles on birchwood, eucalyptus grandis and oat were studied at alkaline and acidic ph conditions. b. pumilus cbmai 0008 grown on the three carbon sources produced mainly beta-xylanase. at ph 10, the levels of xylanase ... | 2003 | 12573558 |
| towards a genus-wide reference linkage map for eucalyptus based exclusively on highly informative microsatellite markers. | a novel set of 50 highly polymorphic microsatellite markers were developed and mapped on existing rapd framework maps of eucalyptus grandis and e. urophylla. together with the twenty previously developed microsatellite markers, these were used to align the existing maps for the two most commercially important eucalyptus species in the tropics. sixty-three microsatellite markers were placed on the e. grandis map in 11 linkage groups, and 53 on the e. urophylla map distributed in 10 linkage groups ... | 2002 | 12073036 |
| monitoring on-line desalted lignocellulosic hydrolysates by microdialysis sampling micro-high performance anion exchange chromatography with integrated pulsed electrochemical detection/mass spectrometry. | an on-line system based on microdialysis sampling (md), micro-high performance anion exchange chromatography (micro-hpaec), integrated pulsed electrochemical detection (iped), and electrospray ionization mass spectrometry (ms) for the monitoring of on-line desalted enzymatic hydrolysates is presented. continuous monitoring of the enzymatic degradation of dissolving pulp from eucalyptus grandis as well as degradation of sugar cane bagasse in a 5-ml reaction vessel was achieved up to 24 h without ... | 2002 | 12001175 |
| automation of solid-phase microextraction-gas chromatography-mass spectrometry extraction of eucalyptus volatiles. | solid-phase microextraction (spme) coupled with gas chromatography (gc)-ion-trap mass spectrometry (itms) is employed to analyze fragrance compounds from different species of eucalyptus trees: eucalyptus dunnii, eucalyptus saligna, eucalyptus grandis, and hybrids of other species. the analyses are performed using an automated system for preincubation, extraction, injection, and analysis of samples. the autosampler used is a combipal and has much flexibility for the development of spme methods an ... | 2002 | 11954651 |
| cryopreservation of axillary buds of a eucalyptus grandis x eucalyptus camaldulensis hybrid. | this paper presents preliminary results from a study to develop methodology for the cryopreservation of axillary buds from an in vitro hybrid eucalyptus grandis (w. hill ex maiden.) x eucalyptus camaldulensis (dehnnh.), maintained for use in a genetic modification programme. axillary buds were encapsulated in an alginate gel, precultured on media containing elevated levels of sucrose, or a combination of sucrose and glycerol. encapsulated buds were then dehydrated by evaporation prior to a two-s ... | 2001 | 11788839 |
| five phloroglucinol-monoterpene adducts from eucalyptus grandis. | five new euglobals possessing the phloroglucinol-monoterpene structure, euglobals g8-g12, together with a known euglobal-iic were isolated from the hexane fraction of the methanol extract of the leaves of eucalyptus grandis. euglobal-g8 is an adduct of formyl-isovaleroyl-phloroglucinol and gamma-terpinene whereas -g9, -g10 and -g11 have the same phloroglucinol moiety fused with alpha-terpinene, while euglobal-g12 has terpinolene fused with the same phloroglucinol moiety. the structures of these ... | 1998 | 11711084 |
| hydroxymethylation and oxidation of organosolv lignins and utilization of the products. | organosolv lignins obtained from eucalyptus grandis, sugarcane bagasse and picea abies by acetosolv, formacell and organocell processes were characterized, fractionated and converted to hydroxymethylated and oxidized products. the reactivity of lignins with formaldehyde did not improve significantly with the fractionation. both eucalyptus acetosolv (eac) and eucalyptus formacell (efo) lignins retained high heterogeneity in relation to the molecular weight distribution but not in relation to stru ... | 2001 | 11480918 |
| relationships between hydraulic architecture and leaf photosynthetic capacity in nitrogen-fertilized eucalyptus grandis trees. | we compared the effects of nitrogen fertilization on shoot hydraulic architecture and leaf photosynthetic properties of eucalyptus grandis hill ex maiden trees in hawaii. it was hypothesized that water transport capacity would adjust to nutrient availability, with leaf specific hydraulic conductivity (kl) increasing in fertilized trees in coordination with higher photosynthetic capacity per unit leaf area. trees were grown from seedlings in the field for 10 months at four rates of nitrogen (n) f ... | 2001 | 11446997 |
| comparison of four trap types for ambrosia beetles (coleoptera, scolytidae) in brazilian eucalyptus stands. | eucalyptus spp. plantations represent >60% of the reforested area in brazil. although ambrosia beetle attacks on live trees were at first nonexistent, they have begun to appear with greater frequency. monitoring for pest insects is a key factor in integrated pest management, and baited traps are one of the most widely used methods for insect population detection and survey. we compared the efficiency of the most widely used trap in brazil to survey for ambrosia beetles and other scolytidae, the ... | 2000 | 11142301 |
| effects of purified endo-beta-1,4-xylanases of family 10 and 11 and acetyl xylan esterases on eucalypt sulfite dissolving pulp. | sulfite dissolving pulp from eucalyptus grandis contained approximately 3.8% o-acetyl-4-o-methylglucuronoxylan with a molar ratio of xylose:4-o-methylglucuronic acid:acetyl group close to 13.6:1:6.2. the effects produced by purified endo-xylanases from two different glycosyl hydrolase families (family 10 and 11) as well as acetyl xylan esterases were examined and assessed on pulp in relation to their bleaching abilities. the purified endo-xylanases hydrolyzed only a limited portion (less than 30 ... | 2000 | 11051420 |
| cancer chemopreventive activity of euglobal-g1 from leaves of eucalyptus grandis. | in the course of our continuing search for novel cancer chemopreventive agents from natural sources, several kinds of eucalyptus plants were screened. consequently, the phlorogrucinol-monoterpene derivative, euglobal-g1 (eg-1), was obtained from the leaves of eucalyptus grandis as an active constituent. eg-1 exhibited the remarkable inhibitory effect on two-stage carcinogenesis test of mouse skin tumors induced by 7, 12-dimethylbenz[a]anthracene (dmba) as an initiator and fumonisin-b1, which has ... | 2000 | 10814880 |
| evaluation of acute toxicity and genotoxicity of liquid products from pyrolysis of eucalyptus grandis wood. | slow pyrolysis of eucalyptus grandis wood was performed in an oven laboratory, and smoke was trapped and condensed to yield liquid products. polycyclic aromatic hydrocarbons (pahs) and phenolic fractions were isolated from the former liquid products using adsorption column chromatography (acc) and identified by gc/ms. concentrations of pah and phenolic fractions in total pyrolysis liquids were respectively 48.9 microg/g and 8.59% (w/w). acute toxicity of total samples of pyrolysis liquids and th ... | 2000 | 10629278 |
| nighttime water use in an irrigated eucalyptus grandis plantation. | sap flow measurements showed that a well-watered four-year-old plantation of eucalyptus grandis (hill ex maiden) at wagga wagga, new south wales, australia, used 0.8 mm of water between 2100 and 0500 h on the midwinter night of july 30. sap flow ceased for 2 to 3 h after sunset before recommencing at high rates that reached a maximum of 0.3 mm per h between 0200 and 0300 h. this pattern is inconsistent with the replenishment of tissue water reserves depleted during the day. moreover, maximum lea ... | 1999 | 10562402 |
| modification of the carbohydrate composition of sulfite pulp by purified and characterized beta-xylanase and beta-xylosidase of aureobasidium pullulans. | both beta-xylanase and beta-xylosidase were purified to homogeneity from a xylose-grown culture of aureobasidium pullulans. cellular distribution studies of enzyme activities revealed that beta-xylanase was an extracellular enzyme, during both the exponential and stationary phases, whereas beta-xylosidase was mostly periplasmic associated. the beta-xylanase exhibited very high specificity for xylan extracted from eucalyptus grandis dissolving pulp, whereas the beta-xylosidase was only active on ... | 1999 | 10194394 |
| eucalypt mads-box genes expressed in developing flowers. | three mads-box genes were identified from a cdna library derived from young flowers of eucalyptus grandis w. hill ex maiden. the three egm genes are single-copy genes and are expressed almost exclusively in flowers. the egm1 and egm3 genes shared strongest homology with other plant mads-box genes, which mediate between the floral meristem and the organ-identity genes. the egm3 gene was also expressed strongly in the receptacle or floral tube, which surrounds the carpels in the eucalypt flower an ... | 1998 | 9765522 |
| genetic mapping of quantitative trait loci controlling growth and wood quality traits in eucalyptus grandis using a maternal half-sib family and rapd markers. | quantitative trait loci (qtl) mapping of forest productivity traits was performed using an open pollinated half-sib family of eucalyptus grandis. for volume growth, a sequential qtl mapping approach was applied using bulk segregant analysis (bsa), selective genotyping (sg) and cosegregation analysis (csa). despite the low heritability of this trait and the heterogeneous genetic background employed for mapping, bsa detected one putative qtl and sg two out of the three later found by csa. the thre ... | 1996 | 8913761 |
| genetic linkage maps of eucalyptus grandis and eucalyptus urophylla using a pseudo-testcross: mapping strategy and rapd markers. | we have used a "two-way pseudo-testcross" mapping strategy in combination with the random amplified polymorphic dna (rapd) assay to construct two moderate density genetic linkage maps for species of eucalyptus. in the cross between two heterozygous individuals many single-dose rapd markers will be heterozygous in one parent, null in the other and therefore segregate 1:1 in their f1 progeny following a testcross configuration. meiosis and gametic segregation in each individual can be directly and ... | 1994 | 7982566 |
| structures of euglobal-g1, -g2, and -g3 from eucalyptus grandis, three new inhibitors of epstein-barr virus activation. | three new euglobals with acylphloroglucinol-monoterpene structures, named euglobal -g1 (1), -g2 (2), and -g3 (3) were isolated from the chloroform extract of the juvenile leaves of eucalyptus grandis (myrtaceae). the structures of these new compounds were determined on the basis of their spectral data. the compounds strongly inhibited the epstein-barr virus activation. | 1990 | 2168298 |