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lepidoptera pests collected in eucalyptus urophylla (myrtaceae) plantations during five years in três marias, state of minas gerais, brazil.lepidoptera pest species from eucalyptus were collected in eucalyptus urophylla plantations in the region of três marias, state of minas gerais, brazil, every 15 days from june 1989 to june 1994 with five light traps. twelve primary and 15 secondary pest species were collected in the period with an average of 13,387 and 812 individuals per light trap, respectively. most collected primary pest species were stenalcidia grosica (geometridae), iridopsis subferaria (geometridae), eupseudosoma aberran ...200112189789
chemical compositions and larvicidal activities of leaf essential oils from two eucalyptus species.in the current study, the mosquito larvicidal activity of leaf essential oils and their constituents from two eucalyptus species (eucalyptus camaldulensis and eucalyptus urophylla) against two mosquito species, aedes aegypti and aedes albopictus, was investigated. in addition, the chemical compositions of the leaf essential oils were analyzed using gas chromatography-mass spectrometry. results from the larvicidal tests revealed that essential oil from the leaves of e. camaldulensis had an excell ...200918396398
first record of colletogloeopsis zuluense comb. nov., causing a stem canker of eucalyptus in china.coniothyrium zuluense causes a serious canker disease of eucalyptus in various parts of the world. very little is known regarding the taxonomy of this asexual fungus, which was provided with a name based solely on morphological characteristics. in this study we consider the phylogenetic position of c. zuluense using dna-based techniques. distance analysis using 18s and its regions revealed extensive sequence divergence relative to the type species of coniothyrium, c. palmarum and species of para ...200616378717
phenotypic plasticity of growth trajectory and ontogenic allometry in response to density for eucalyptus hybrid clones and families.and aims response to density is a crucial aspect of the ecology of trees in forests and plantations. few studies have investigated the genetics of plasticity in response to density for growth traits such as height and circumference through development.200516043439
comprehensive genetic dissection of wood properties in a widely-grown tropical tree: eucalyptus.eucalyptus is an important genus in industrial plantations throughout the world and is grown for use as timber, pulp, paper and charcoal. several breeding programmes have been launched worldwide to concomitantly improve growth performance and wood properties (wps). in this study, an interspecific cross between eucalyptus urophylla and e. grandis was used to identify major genomic regions (quantitative trait loci, qtl) controlling the variability of wps.201121651758
sap flow response of eucaylyptus (eucalyptus urophylla) to environmental stress in south china.sap flow and environmental conditions were monitored at two eucalyptus (eucalyptus urophylla s.t.blake) plantations at hetou and jijia, located in leizhou, zhanjiang, guangdong province. it was found that daily sap flux density (sfd) of eucalyptus was closely related to daily atmospheric vapor pressure deficit (vpd) (r2 = 0.76, p = 0.01 at hetou and r2 = 0.7021, p = 0.01 at jijia) at both sites. no significant relationship existed between daily sfd and mean daily air temperature at both sites. d ...200415362193
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 ...200415339736
water use by fast-growing eucalyptus urophylla plantations in southern china.tree growth, water use, climate and soil water conditions were monitored over 12 months in two 3-4-year-old eucalyptus urophylla s.t. blake plantations on the leizhou peninsula of southern china. the hetou plantation was established on a sandy soil of sedimentary origin with low water storage capacity, and the jijia plantation was established on a clay soil formed on basalt. sapwood area was approximately 50% higher at jijia than at hetou because of differences in plant spacing (1994 versus 1356 ...200415234901
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 ...200312885162
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 ...200212582553
correlation between chemical composition and antibacterial activity of essential oils of some aromatic medicinal plants growing in the democratic republic of congo.the chemical composition of essential oils from 15 aromatic medicinal plant species growing in the democratic republic of congo have been studied. more than 15 constituents in an amount higher than 0.1% were identified in each essential oil. 1,8-cineole, alpha and beta-pinene, p-cymene, myrcene, gamma-terpinene, alpha-terpineol and limonene were prevalent constituents in almost more than 10 selected plant species. results from the antibacterial testing by the diffusion method indicate that all e ...200211801384
[population density of eucalyptus urophylla plantation].this paper dealt with the relationships and correlation models of the population density of 5.6 years old eucalyptus urophylla plantation with its crown width, diamter at breast height(dbh), tree height, individual standing volume, stand volume, wood properties and survital rate. the results showed that the population density remarkably affected dbh, individual standing volume, crown width, live branch height, stand volume and wood fiber width; but not affect tree height, basic density of wood, ...200011766582
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 ...19947982566
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 ...201121310251
[biomass- and energy allocation in eucalyptus urophylla x eucalyptus tereticornis plantations at different stand ages].an investigation was made on the biomass- and energy allocation in 1-4-year-old eucalyptus urophylla x eucalyptus tereticornis plantations at beipo forest farm of suixi county in guangdong province. stand age had significant effects on the retained biomass of the plantations (p < 0.01). the biomass was in the range of 10.61-147.28 t x hm(-2). both the total biomass and the biomass of above- and belowground components increased with increasing stand age. the proportions of leaf-, branch- and bark ...201020387417
[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 ...201020305903
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 ...201020124554
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 ...200919936031
mortality of atta sexdens rubropilosa (hymenoptera: formicidae) workers in contact with colony waste from different plant sources.the objective of this work was to study the effect of colony waste on the mortality of workers of atta sexdens rubropilosa forel colonies fed with different plant substrates. eight nests were used; two colonies each were fed with acalypha wilkesiana müller.arg, ligustrum japonicum thunb, eucalyptus urophylla s.t. blake or a mixture of the three substrates in equal proportions. irrespective of diet, being kept with waste led to higher mortality. however, workers that were kept in contact with was ...201019366474
leaf anatomy and morphometry in three eucalypt clones treated with glyphosate.this work aimed to evaluate the effects of simulated drift of glyphosate on the morphoanatomy of three eucalypt clones and to correlate the intoxication symptoms on a microscopic scale with those observed in this visual analysis. the effects of glyphosate drift were proportional to the five doses tested, with eucalyptus urophylla being more tolerant to the herbicide than e. grandis and urograndis hybrid. the symptoms of intoxication which were similar for the different clones at 7 and 15 days af ...200919347155
fat body of the zoophytophagous predator brontocoris tabidus (het.: pentatomidae) females: impact of the herbivory and age.the effect of different diets [tenebrio molitor l. (coleoptera: tenebrionidae) pupae; t. molitor pupae and eucalyptus cloeziana plant; t. molitor and eucalyptus urophylla plant and t. molitor pupae and guava plant (psidium guajava)] on the morpho-physiological features of the fat body of brontocoris tabidus (signoret) (heteroptera: pentatomidae) females was studied in the field. adult females of b. tabidus have trophocytes about twofold larger (966.32mum(2)) when fed on e. urophylla and t. molit ...200919278855
mortality of the defoliator euselasia eucerus (lepidoptera: riodinidae) by biotic factors in an eucalyptus urophylla plantation in minas gerais state, brazil.euselasia eucerus (hewitson, 1872) (lepidoptera: riodinidae) is a brazilian native species commonly found in eucalyptus plantations. biotic mortality factors of this defoliator were studied in a eucalyptus urophylla plantation in minas gerais state, brazil aiming to identify natural enemies and their impact on this insect. euselasia eucerus had biotic mortality factors during all development stages. the most important were trichogramma maxacalii voegelé and pointel, 1980 (hymenoptera: trichogram ...200919274332
[inhibitory effects and chemical basis of eucalyptus orelliana wood meals on the growth of alexandrium tamarense].to provide information on the screen of newly and efficient algaecides in controlling harmful algal blooms (habs), the effects of wood meals from eucalyptus torelliana, eucalyptus urophylla, eucalyptus exserta on the growth of alexandrium tamarense were observed and the chemical basis of the antialgal effect was discussed. the results show that the inhibitory activities of the three wood meals are different, and e. torelliana wood meals have the highest inhibitory activity. there are little diff ...200818839589
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 ...199618469954
[invertebrate biodiversity in litter layers of natural forest and eucalyptus plantation in eastern guangdong, china].a comparative study was made on the community structure of invertebrates and the species diversity of thrips in the litter layers of natural forest and eucalyptus urophylla plantation in eastern guangdong of china. the results showed that in natural forest, acarina, collembola, dipteran larvae, hymenoptera, thysanoptera, and coleoptera were the most abundant invertebrates, accounting for 96.5% of the total individuals collected; while in eucalyptus plantation, acarina, collembola, dipteran larva ...200818419067
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.200717881341
selecting ectomycorrhizal fungi for inoculating plantations in south china: effect of scleroderma on colonization and growth of exotic eucalyptus globulus, e. urophylla, pinus elliottii, and p. radiata.plantation forestry with exotic trees in south china needs compatible symbionts to improve the growth of seedlings in nurseries and to enhance establishment and growth in the field. scleroderma, a potentially suitable symbiont for inoculation, is not being used in containerized nurseries in the region due to poor knowledge of its host range. the ability of 15 collections of scleroderma, nine from australia and six from asia, to colonize and promote growth of four important exotic plantation tree ...200616534620
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 ...201021637427
forest soil co2 fluxes as a function of understory removal and n-fixing species addition.we report on the effects of forest management practices of understory removal and n-fixing species (cassia alata) addition on soil co2 fluxes in an eucalyptus urophylla plantation (eup), acacia crassicarpa plantation (acp), 10-species-mixed plantation (tp), and 30-species-mixed plantation (thp) using the static chamber method in southern china. four forest management treatments, including (1) understory removal (ur); (2) c. alata addition (ca); (3) understory removal and replacement with c. alat ...201122066218
[microanalysis study on lignin distribution of wood with different growth stress level by sem-edxa].by virtue of fe-sem and edxa marked by br element, the relationship between the lignin distribution and growth stress was micro-analyzed by normal wood of plantation eucalyptus urophylla x e. grandis with different growth stress levels. the results indicated that the lignin contents of different cell wall layers were not related to the growth stress level, and the lignin content (from high level to low level) in sequence was cell corner, compound middle lamellae, s1, s2 and s3; the lignin conten ...201122295794
[preliminary screening tests of molluscicidal effect of extracts from eucalyptus leaves].to investigate the molluscicidal effects of extracts from five eucalyptus leaves collected from guangdong province, china.201223593845
effects of an inducible aiia gene on disease resistance in eucalyptus urophylla × eucalyptus grandis.n-acyl-homoserine lactones (ahls) are metabolites of mostly gram-negative bacteria and are critical signaling molecules in bacterial quorum-sensing systems. at threshold concentrations, ahls can activate the expression of pathogenic genes and induce diseases. therefore, reducing ahl concentrations is a key point of disease control in plants. ahl-lactonase, which is expressed by aiia, is widespread in bacillus sp and can hydrolyze ahls. in the present study, we cloned aiia from bacillus subtilis ...201626905275
eucalyptus growth promotion by endophytic bacillus spp.clonal eucalyptus plantings have increased in recent years; however, some clones with high production characteristics have vegetative propagation problems because of weak root and aerial development. endophytic microorganisms live inside healthy plants without causing any damage to their hosts and can be beneficial, acting as plant growth promoters. we isolated endophytic bacteria from eucalyptus plants and evaluated their potential in plant growth promotion of clonal plantlets of eucalyptus uro ...201222930432
moderate-density molecular maps of eucalyptus urophylla s. t. blake and e. tereticornis smith genomes based on rapd markers.moderate-density molecular maps were constructed for the genomes of eucalyptus urophylla s. t. blake and e. tereticornis smith using rapd markers and an interspecific cross between the two species. one hundred and eighty-three primers were employed to generate 245 and 264 parent-specific markers in e. urophylla and e. tereticornis, respectively, as well as 49 parent-shared markers. the normally segregating markers, including 208 (84.9%) specific to maternal e. urophylla, 175 (66.3%) to paternal ...200312733665
reforestation in southern china: revisiting soil n mineralization and nitrification after 8 years restoration.nitrogen availability and tree species selection play important roles in reforestation. however, long-term field studies on the effects and mechanisms of tree species composition on n transformation are very limited. eight years after tree seedlings were planted in a field experiment, we revisited the site and tested how tree species composition affects the dynamics of n mineralization and nitrification. both tree species composition and season significantly influenced the soil dissolved organic ...201626794649
[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), ...201222489473
microsporogenesis and flower development in eucalyptus urophylla × e. tereticornis.we compared microsporogenesis and flower development in eucalyptus urophylla × e. tereticornis. in this study, although microsporogenesis and cytokinesis occurred simultaneously during meiosis of pollen mother cells, we observed a strong asynchronism in different anthers from a flower bud. the developmental period of microsporogenesis in anthers originated from the long thrum before the short thrum. flower development was also asynchronous at different locations on a branch. the flower buds grew ...201526069443
flavonoid supplementation affects the expression of genes involved in cell wall formation and lignification metabolism and increases sugar content and saccharification in the fast-growing eucalyptus hybrid e. urophylla x e. grandis.eucalyptus species are the most widely planted hardwood species in the world and are renowned for their rapid growth and adaptability. in brazil, one of the most widely grown eucalyptus cultivars is the fast-growing eucalyptus urophylla x eucalyptus grandis hybrid. in a previous study, we described a chemical characterization of these hybrids when subjected to flavonoid supplementation on 2 distinct timetables, and our results revealed marked differences between the wood composition of the treat ...201425407319
investigating the molecular underpinnings underlying morphology and changes in carbon partitioning during tension wood formation in eucalyptus.tension wood has distinct physical and chemical properties, including altered fibre properties, cell wall composition and ultrastructure. it serves as a good system for investigating the genetic regulation of secondary cell wall biosynthesis and wood formation. the reference genome sequence for eucalyptus grandis allows investigation of the global transcriptional reprogramming that accompanies tension wood formation in this global wood fibre crop. we report the first comprehensive analysis of ph ...201525388807
high-resolution genetic maps of eucalyptus improve eucalyptus grandis genome assembly.genetic maps are key tools in genetic research as they constitute the framework for many applications, such as quantitative trait locus analysis, and support the assembly of genome sequences. the resequencing of the two parents of a cross between eucalyptus urophylla and eucalyptus grandis was used to design a single nucleotide polymorphism (snp) array of 6000 markers evenly distributed along the e. grandis genome. the genotyping of 1025 offspring enabled the construction of two high-resolution ...201525385325
formation of carbonyl groups on cellulose during ozone treatment of pulp: consequences for pulp bleaching.the formation of carbonyl groups during the ozone treatment (z) of eucalyptus (eucalyptus grandis and eucalyptus urophylla hybrid) kraft pulps and their behaviors during subsequent alkaline stages were investigated by the ccoa method with carbazole-9-carboxylic acid [2-(2-aminooxethoxy)-ethoxy] amide (ccoa) as the carbonyl-selective fluorescence label. several pulp samples with or without lignin and hexenuronic acids (hexa) were used to elucidate the effects of these components when present in u ...201424815405
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 ...201223148685
seasonality of nitrogen partitioning (non-structural vs structural) in the leaves and woody tissues of tropical eucalypts experiencing a marked dry season.numerous studies have shown that internal nitrogen (n) translocation in temperate tree species is governed by photoperiod duration and temperature. for tropical tree species, the seasonality of rainfall is known to affect growth and foliage production, suggesting that efficient internal n recycling also occurs throughout the year. we tested this hypothesis by comparing the n budgets and n partitioning (non-structural vs structural n) in the different organs of 7-year-old eucalyptus urophylla (s. ...201728369560
identification of the cad gene from eucalyptus urophylla glu4 and its functional analysis in transgenic tobacco.cinnamyl alcohol dehydrogenase (cad) catalyzes the final step in lignin biosynthesis. the genus eucalyptus belongs to the family myrtaceae, which is the main cultivated species in china. eucalyptus urophylla glu4 (glu4) is widely grown in guangxi. it is preferred for pulping because of its excellent cellulose content and fiber length. based on glu4 and cad gene expression, a eucalyptus variety low in lignin content should be obtained using transgenic technology, which could reduce the cost of pu ...201627966751
carbon assimilation in eucalyptus urophylla grown under high atmospheric co2 concentrations: a proteomics perspective.photosynthetic organisms may be drastically affected by the future climate projections of a considerable increase in co2 concentrations. growth under a high concentration of co2 could stimulate carbon assimilation-especially in c3-type plants. we used a proteomics approach to test the hypothesis of an increase in the abundance of the enzymes involved in carbon assimilation in eucalyptus urophylla plants grown under conditions of high atmospheric co2. our strategy allowed the profiling of all cal ...201727677843
hydraulic balance of a eucalyptus urophylla plantation in response to periodic drought in low subtropical china.a clear understanding of hydraulic regulation in cultivated plants is crucial for addressing challenges to forest water cycling due to climate changes in low subtropical china. experiments were conducted to determine the hydrologic balance of a eucalyptus urophylla plantation in response to periodic drought. trees displayed lower stomatal conductance (gs) and leaf water potentials (ψl) during the dry periods. a decrease of 22.4% was found for the maximum reference gs (gs at d = 1 kpa; gsref-max) ...201627725821
dominance of ammonia-oxidizing archaea community induced by land use change from masson pine to eucalypt plantation in subtropical china.a considerable proportion of masson pine forests have been converted into eucalypt plantations in the last 30 years in guangdong province, subtropical china, for economic reasons, which may affect the ammonia-oxidizing archaea (aoa) community and the process of ammonia transformation. in order to determine the effects of forest conversion on aoa community, aoa communities in a masson pine (pinus massoniana) plantation and a eucalypt (eucalyptus urophylla) plantation, which was converted from the ...201627094186
effect of biodegradation on thermogravimetric and chemical characteristics of hardwood and softwood by brown-rot fungus.the thermogravimetric and chemical characterization of hardwood eucalyptus urophylla (ep) and softwood pinus massoniana (mp) pretreated by brown-rot fungus gloeophyllum trabeum were investigated. the results indicated that the brown-rot fungus pretreatment can optimize the thermal decomposition and decrease the initiation temperatures (8-11°c lower) of both the ep and mp pyrolysis. the mean activation energy values of the bio-treated samples were 29.7kj/mol (for ep) and 42.3kj/mol (for mp) lower ...201627035476
down-regulation of p-coumaroyl quinate/shikimate 3'-hydroxylase (c3'h) and cinnamate 4-hydroxylase (c4h) genes in the lignin biosynthetic pathway of eucalyptus urophylla × e. grandis leads to improved sugar release.lignocellulosic materials provide an attractive replacement for food-based crops used to produce ethanol. understanding the interactions within the cell wall is vital to overcome the highly recalcitrant nature of biomass. one factor imparting plant cell wall recalcitrance is lignin, which can be manipulated by making changes in the lignin biosynthetic pathway. in this study, eucalyptus down-regulated in expression of cinnamate 4-hydroxylase (c4h, ec 1.14.13.11) or p-coumaroyl quinate/shikimate 3 ...201526312068
fungal planet description sheets: 281-319.novel species of fungi described in the present study include the following from south africa: alanphillipsia aloeicola from aloe sp., arxiella dolichandrae from dolichandra unguiscati, ganoderma austroafricanum from jacaranda mimosifolia, phacidiella podocarpi and phaeosphaeria podocarpi from podocarpus latifolius, phyllosticta mimusopisicola from mimusops zeyheri and sphaerulina pelargonii from pelargonium sp. furthermore, barssia maroccana is described from cedrus atlantica (morocco), codinae ...201425737601
genetic architecture of carbon isotope composition and growth in eucalyptus across multiple environments.in the context of climate change, the water-use efficiency (wue) of highly productive tree varieties, such as eucalypts, has become a major issue for breeding programmes. this study set out to dissect the genetic architecture of carbon isotope composition (δ(13) c), a proxy of wue, across several environments. a family of eucalyptus urophylla × e. grandis was planted in three trials and phenotyped for δ(13) c and growth traits. high-resolution genetic maps enabled us to target genomic regions un ...201525643911
[comparison of the water consumption characteristics of eucalyptus and corymbia clone seedlings and the local indigenous tree species bischofia javanica].the water consumption, water consumption rate, net photosynthetic rate (pn), transpiration rate (tr) and water use efficiency (wue) of eucalyptus urophylla x e. grandis dh33-27, e. urophylla x e. grandis dh32-29, e. grandis h1, corymbia ptychocarpa and an indigenous tree species bischofia javanica were studied in normal soil moisture condition. the average daily water consumption of the five tree species was in the order of e. urophylla x e. grandis dh32-29 (188.47 +/- 14. 91) g > e. urophylla x ...201425223018
improving the enzymatic hydrolysis of thermo-mechanical fiber from eucalyptus urophylla by a combination of hydrothermal pretreatment and alkali fractionation.the recalcitrance of lignocellulosic biomass is a major limitation for its conversion into biofuels by enzymatic hydrolysis. the use of a pretreatment technology is an essential step to diminish biomass recalcitrance for bioethanol production. in this study, a two-step pretreatment using hydrothermal pretreatment at various temperatures and alkali fractionation was performed on eucalyptus fiber. the detailed chemical composition, physicochemical characteristics, and morphology of the pretreated ...201425184000
hylax bahiensis bechyné (chrysomelidae: eumolpinae): a new potential pest of eucalyptus and species used for atlantic rainforest restoration.hylax bahiensis bechyné (coleoptera: chrysomelidae), a new pest of forest species, including eucalyptus (hybrid eucalyptus urophylla x eucalyptus grandis), joannesia princeps, mimosa artemisiana, croton urucurana, croton floribundus, and senna multijuga is recorded. the insect attack in clonal eucalyptus plantations and in forest restoration areas between 2010 and 2013 in the states of espírito santo, bahia and minas gerais, brasil, was observed for the first time. the outbreaks generally occurr ...201526013018
fuzzy logic applied to prospecting for areas for installation of wood panel industries.prospecting for suitable areas for forestry operations, where the objective is a reduction in production and transportation costs, as well as the maximization of profits and available resources, constitutes an optimization problem. however, fuzzy logic is an alternative method for solving this problem. in the context of prospecting for suitable areas for the installation of wood panel industries, we propose applying fuzzy logic analysis for simulating the planting of different species and eucaly ...201728237845
genome-wide analysis of egeve_1, a transcriptionally active endogenous viral element associated to small rnas in eucalyptus genomes.endogenous viral elements (eves) are the result of heritable horizontal gene transfer from viruses to hosts. in the last years, several eve integration events were reported in plants by the exponential availability of sequenced genomes. eucalyptus grandis is a forest tree species with a sequenced genome that is poorly studied in terms of evolution and mobile genetic elements composition. here we report the characterization of e. grandis endogenous viral element 1 (egeve_1), a transcriptionally a ...201728235127
constancy, distribution, and frequency of lepidoptera defoliators of eucalyptus grandis and eucalyptus urophylla (myrtaceae) in four brazilian regions.the growth of the brazilian forest sector with monocultures favors the adaptation of arthropoda pests. the lepidoptera order includes major pests of eucalyptus spp. (myrtaceae). the aim of this work is to study the population constancy, distribution, and frequency of lepidoptera primary pests of eucalyptus spp. lepidoptera pests in eucalyptus spp. plantations were collected in três marias and guanhães (state of minas gerais), niquelândia (state of goiás), and monte dourado (state of pará), brazi ...201627255768
plasticity of primary and secondary growth dynamics in eucalyptus hybrids: a quantitative genetics and qtl mapping perspective.the genetic basis of growth traits has been widely studied in forest trees. quantitative trait locus (qtl) studies have highlighted the presence of both stable and unstable genomic regions accounting for biomass production with respect to tree age and genetic background, but results remain scarce regarding the interplay between qtls and the environment. in this study, our main objective was to dissect the genetic architecture of the growth trajectory with emphasis on genotype x environment inter ...201323978279
high nitrogen and elevated [co2] effects on the growth, defense and photosynthetic performance of two eucalypt species.atmospheric nitrogen deposition and [co(2)] are increasing and represent environmental problems. planting fast-growing species is prospering to moderate these environmental impacts by fixing co(2). therefore, we examined the responses of growth, photosynthesis, and defense chemical in leaves of eucalyptus urophylla (u) and the hybrid of e. deglupta × e. camadulensis (h) to different co(2) and nitrogen levels. high nitrogen load significantly increased plant growth, leaf n, net photosynthetic rat ...201222784683
effects of the interception of litterfall by the understory on carbon cycling in eucalyptus plantations of south china.for the purposes of forest restoration, carbon (c) fixation, and economic improvement, eucalyptus (eucalyptus urophylla) has been widely planted in south china. the understory of eucalyptus plantations is often occupied by a dense community of the fern dicranopteris dichotoma, which intercepts tree canopy leaf litter before it reaches the ground. to understand the effects of this interception of litterfall on c cycling in eucalyptus plantations, we quantified the mass of intercepted litter and t ...201424959853
the environment, not space, dominantly structures the landscape patterns of the richness and composition of the tropical understory vegetation.the mechanisms driving the spatial patterns of species richness and composition are essential to the understanding of biodiversity. numerous studies separately identify the contributions of the environment (niche process) and space (neutral process) to the species richness or composition at different scales, but few studies have investigated the contributions of both types of processes in the two types of data at the landscape scale. in this study, we partitioned the spatial variations in all, e ...201324278417
modeling additive and non-additive effects in a hybrid population using genome-wide genotyping: prediction accuracy implications.hybrids are broadly used in plant breeding and accurate estimation of variance components is crucial for optimizing genetic gain. genome-wide information may be used to explore models designed to assess the extent of additive and non-additive variance and test their prediction accuracy for the genomic selection. ten linear mixed models, involving pedigree- and marker-based relationship matrices among parents, were developed to estimate additive (a), dominance (d) and epistatic (aa, ad and dd) ef ...201626328760
transcriptional profiles of hybrid eucalyptus genotypes with contrasting lignin content reveal that monolignol biosynthesis-related genes regulate wood composition.eucalyptus species constitutes the most widely planted hardwood trees in temperate and subtropical regions. in this study, we compared the transcript levels of genes involved in lignocellulose formation such as cellulose, hemicellulose and lignin biosynthesis in two selected 3-year old hybrid eucalyptus (eucalyptus urophylla × eucalyptus grandis) genotypes (am063 and am380) that have different lignin content. am063 and am380 had 20.2 and 35.5% of klason lignin content and 59.0 and 48.2%, α-cellu ...201627148283
does diatomaceous earth control leaf-cutter ants (hymenoptera: formicidae) in the eucalyptus plantations?genus atta includes some of the most important formicidae leaf cutter ants which cause extensive damage to the eucalyptus plantations. atta sexdens rubropilosa forel, one of the chief pests in brazilian reforestation, can restrict and reduce forest productivity by its intense and constant leaf-cutting activities on plants at all stages. therefore, the demand for new products to control a. sexdens rubropilosa indicates the study of the utilization of the dry powder formulation of diatomaceous ear ...201526470237
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