Artykuły w czasopismach: „Corymbia”

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Shepherd, M., S. Kasem, D. Lee i R. Henry. "Construction of Microsatellite Linkage Maps for Corymbia". Silvae Genetica 55, nr 1-6 (1.12.2006): 228–38. http://dx.doi.org/10.1515/sg-2006-0030.

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Abstract The genus Corymbia is closely related to the genus Eucalyptus, and like Eucalyptus contains tree species that are important for sub-tropical forestry. Corymbia’s close relationship with Eucalyptus suggests genetic studies in Corymbia should benefit from transfer of genetic information from its more intensively studied relatives. Here we report a genetic map for Corymbia spp. based on microsatellite markers identified de novo in Corymbia sp or transferred from Eucalyptus. A framework consensus map was generated from an outbred F2 population (n = 90) created by crossing two unrelated Corymbia torelliana × C. citriodora subsp. variegata F1 trees. The map had a total length of 367 cM (Kosambi) and was composed of 46 microsatellite markers distributed across 13 linkage groups (LOD 3). A high proportion of Eucalyptus microsatellites (90%) transferred to Corymbia. Comparative analysis between the Corymbia map and a published Eucalyptus map identified eight homeologous linkage groups in Corymbia with 13 markers mapping on one or both maps. Further comparative analysis was limited by low power to detect linkage due to low genome coverage in Corymbia, however, there was no convincing evidence for chromosomal structural differences because instances of non-synteny were associated with large distances on the Eucalyptus map. Segregation distortion was primarily restricted to a single linkage group and due to a deficit of hybrid genotypes, suggesting that hybrid inviability was one factor shaping the genetic composition of the F2 population in this inter-subgeneric hybrid. The conservation of microsatellite loci and synteny between Corymbia and Eucalyptus suggests there will be substantial value in exchanging information between the two groups.

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Healey, Adam, David J. Lee, Agnelo Furtado i Robert J. Henry. "Evidence of inter-sectional chloroplast capture in Corymbia among sections Torellianae and Maculatae". Australian Journal of Botany 66, nr 5 (2018): 369. http://dx.doi.org/10.1071/bt18028.

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Chloroplast capture through hybridisation and introgression is well described within Eucalyptus. Despite the propensity of the Corymbia genus (eucalypts) to form hybrids from wide crosses, description of chloroplast capture in Corymbia has, until recently, been limited. In this study our aim was to investigate evidence of intersectional chloroplast capture between sections Torellianae and Maculatae. Using whole-genome next-generation sequencing data, the complete chloroplast genomes were assembled from four Corymbia taxa: Corymbia citriodora subspecies citriodora (Hook.) K.D.Hill & L.A.S.Johnson, Corymbia citriodora subspecies variegata (F.Muell.) A.R.Bean & M.W.McDonald, Corymbia henryi (S.T.Blake) K.D.Hill & L.A.S.Johnson, and Corymbia torelliana (F.Muell.) K.D.Hill & L.A.S.Johnson, represented by eight genotypes. Phylogenetic analysis and comparison among Corymbia chloroplast genomes and nuclear external transcribed spacer (ETS) sequences revealed chloroplast capture among Corymbia species across distinct sections Torellianae and Maculatae within subgenus Blakella. Reticulate evolution, along with Eucalyptus, likely extends into Corymbia as evidenced by incongruent plastid and nuclear phylogenetic trees, suggestive of its importance of hybridisation and introgression during the evolution of eucalypts.

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Taylor, KL. "The tribe Ctenarytainini (Hemiptera : Psylloidea): a key to known Australian genera, with new species and two new genera". Invertebrate Systematics 4, nr 1 (1990): 95. http://dx.doi.org/10.1071/it9900095.

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The key includes eight genera known to occur in Australia and Papua New Guinea. These are Ctenarytaina Ferris & Klyver (type genus), Syncarpiolyma Froggatt, Eriopsylla Froggatt, Blastopsylla Taylor, Anoeconeossa Taylor, Leptospermonastes Taylor, and two new genera, Agelaeopsylla and Cryptoneossa. Keys to the species in Agelaeopsylh, Cryptoneossa and Leptospermonastes are given. Agelaeopsylla contains five new species, A. dividua (type species), A. maculatae, A. corymbiae, A. papuanae (which also occurs in Papua New Guinea), and A. insolita. They feed mainly on Angophora and two 'subgenera' of Eucalyptus (Corymbia and Blakella). The hosts of Cryptoneossa, which contains five new species, C. vulgaris (type species), C. occidentalis, C. triangula, C. minuta, and C. leptospermi, are mainly in the 'subgenera' Monocalyptus and Corymbia of Eucalyptus; some are found on Symphyomyrtus and smaller subgenera, one on Angophora, and one on Leptospermum. Two new species of Leptospermonastes are described; L. maculosipennis and L. fasciata were both collected from Melaleuca spp., a new host for this genus. Eriopsylla and its type species, E. viridis, are redescribed, with one new species, E. malleensis.

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Marchesan, Raquel, Danyelly Nunes de Oliveira, Renata Carvalho da Silva, Lorrainy Azevedo de Carvalho, Rone Tavares Gomes i Vanessa Coelho Almeida. "QUALITY OF CHARCOAL FROM THREE SPECIES OF THE Eucalyptus AND THE Corymbia citriodora SPECIES PLANTED IN THE SOUTH OF TOCANTINS". FLORESTA 50, nr 3 (10.07.2020): 1643. http://dx.doi.org/10.5380/rf.v50i3.65303.

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We aimed to assess the quality of charcoal from three Eucalyptus and Corymbia citriodora species for energy production in the South of Tocantins state. A hybrid Eucalyptus urophylla x Eucalyptus grandis, the species Eucalyptus urophylla, Eucalyptus camaldulensis, and Corymbia citriodora were selected for the study. In the preparation of the material, 20 specimens of each species with the dimensions of 2.0 x 2.0 x 5.0 cm were made, being ten repetitions for each carbonization gait with different final temperatures and heating rates. The basic wood density, total gravimetric yield, total yields in condensable and non-condensable gases, immediate chemical analysis, and higher calorific value were determined. Corymbia citriodora presented higher wood basic density (0.583 g/cm³) and charcoal apparent density (0.459 g/cm³). In immediate chemical analysis, Eucalyptus urophylla and Corymbia citriodora presented the best averages among all species. The calorific value ranged from 7235.97 to 7573.98 (kcal/kg), considered an acceptable value for energy production. The final carbonization temperature of 550°C is recommended, with Eucalyptus urophylla and Corymbia citriodora presenting the best averages.

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DAVIES, KERRIE A., ROBIN M. GIBLIN-DAVIS, WEIMIN YE, GARY S. Taylor i W. KELLEY THOMAS. "Nematodes from galls on Myrtaceae. I. Fergusobia/Fergusonina galls on Corymbia spp., with re-description of F. magna and notes on its phylogenetic relationships". Zootaxa 2634, nr 1 (4.10.2010): 25. http://dx.doi.org/10.11646/zootaxa.2634.1.2.

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Fergusobia magna (Neotylenchidae: Fergusobiinae), collected from axial bud (‘stem’) galls on Corymbia tessellaris growing in coastal regions of Queensland, Australia, is re-described. It is characterised by having a combination of a relatively large, variably shaped parthenogenetic female with a slender conoid tail; a relatively large arcuate infective female with a long slender tail with a pointed tip and a relatively anterior vulva; and relatively large, arcuate, open C or Jshaped males with angular spicules having manubrium and shaft forming 66% of their length, slender tail and peloderan bursa arising at 30–50% body length. Other known forms of Fergusobia/Fergusonina galls from Corymbia are outlined, and the morphology of nematodes from them and the shield morphology of their associated mutualistic fly species from Corymbia spp. are described where known. The possible phylogenetic relationships of these associations from Corymbia are discussed.

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Shepherd, Mervyn, Peter Pomroy, Mark Dieters i David Lee. "Genetic control of propagation traits in a single Corymbia torelliana × Corymbia variegata family". Canadian Journal of Forest Research 37, nr 12 (grudzień 2007): 2563–74. http://dx.doi.org/10.1139/x07-111.

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Genetic control of vegetative propagation traits was described for a second-generation, outbred, intersectional hybrid family (N = 208) derived from two species, Corymbia torelliana (F. Muell.) K.D. Hill & L.A.S. Johnson and Corymbia variegata (F. Muell.) K.D. Hill & L.A.S. Johnson, which contrast for propagation characteristics and in their capacity to develop lignotubers. Large phenotypic variances were evident for rooting and most other propagation traits, with significant proportions attributable to differences between clones (broad-sense heritabilities 0.2–0.5). Bare root assessment of rooting rate and root quality parameters tended to have the highest heritabilities, whereas rooting percentage based on root emergence from pots and shoot production were intermediate. Root biomass and root initiation had the lowest heritabilities. Strong favourable genetic correlations were found between rooting percentage and root quality traits such as root biomass, volume, and length. Lignotuber development on a seedling was associated with low rooting and a tendency to poor root quality in cuttings and was in accord with the persistence of species parent types due to gametic phase disequilibrium. On average, nodal cuttings rooted more frequently and with higher quality root systems, but significant cutting type × genotype interaction indicated that for some clones, higher rooting rates were obtained from tips. Low germination, survival of seedlings, and rooting rates suggested strong hybrid breakdown in this family.

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da Silva, Rafael G., Bruno A. Trevisan, Augusto Cesar G. de Lima, Úrsula Ramos Zaidan, Rafael Tassinari Resende i Patricia Pereira Pires. "Seed seedlings development of different Eucalyptus and Corymbia species purposing forestry advancements for Cerrado biome". TreeDimensional 09, nr 02 (10.11.2022): 1–10. http://dx.doi.org/10.55746/treed.2022.11.002.

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The production of quality seedlings has a direct impact on the productivity of a forestry establishment. Knowing the specifics of each specie and its adaptation to the edaphoclimatic conditions of a given region is essential for the success of a forest plantation. The production of seedlings of Eucalyptus spp. and Corymbia spp. presented in this work comes from the sexual propagation, by seeds. The study carried out the comparison between 13 species of Eucalyptus spp. and Corymbia spp., verifying the quality of the seed lots, via in vitro germination test and by sowing in tubes. The biometric measurements applied in this study were total seedling height, stem diameter and vigor, two measurements of seedlings were carried out in plastic bags and the data were transferred to the R software to be analyzed, applying analysis of variance (ANOVA) and means of variables. The germination percentage was higher in tubes than the results obtained in vitro, with emphasis on the results of the species Eucalyptus dunnii, Corymbia citriodora, Eucalyptus longirostrata and Corymbia maculata, which reached 100% germination in tubes and these are also the species that stood out in biometric measurements, with emphasis on the results of the species Eucalyptus dunnii, Corymbia citriodora and Eucalyptus longirostrata. The study aimed to generate viable, healthy and vigorous seedlings from seminal propagules of Eucalyptus spp. and Corymbia spp., to compose, at the end of the experiment, which has the potential to extend, beyond this study, the Eucalyptus Garden at Escola de Agronomia - EA/UFG), Goiania, GO, Brazil, collaborating with the practical classes that will be able to use the space to present to the students the features inherent to the species.

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Borges, Cilene Cristina, i João Carlos Moreschi. "POTENCIALIDADE DO USO DE CRUZETAS DE MADEIRA TRATADA NO BRASIL". FLORESTA 43, nr 2 (2.07.2013): 313. http://dx.doi.org/10.5380/rf.v43i2.32614.

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ResumoNeste trabalho, são apresentados dados relativos à potencialidade do uso da madeira de Corymbia citriodora, Eucalyptus cloeziana e Eucalyptus dunnii como cruzetas de madeira para redes de distribuição de energia elétrica. Os resultados apresentam o rendimento do processo produtivo para cada espécie, com análise dos ensaios mecânicos de flexão, estudo de penetração em tratamento com o preservativo arseniato de cobre cromatado (CCA) e discussão relativa a considerações econômicas e funcionais do material madeira. A espécie Corymbia citriodora apresentou o melhor rendimento, de 75%, seguido pelo Eucalyptus cloeziana, com 42%. A espécie Eucalyptus dunnii foi desclassificada, por apresentar um rendimento de apenas 7%. Os ensaios mecânicos demonstraram que tanto a espécie Corymbia citriodora quanto a Eucalyptus cloeziana atendem aos requisitos de resistência da norma técnica NBR 8458. No tratamento preservativo das cruzetas, observou-se penetração total de CCA no alburno da espécie Corymbia citriodora, o que, em conjunto com o cerne naturalmente resistente e o rendimento produtivo, classifica essa espécie como a mais indicada entre as estudadas. Com base nos resultados obtidos, conclui-se que o uso de cruzetas de madeira é viável no Brasil, além de menos impactante ao meio ambiente, por se tratar de um recurso natural renovável.Palavras-chave: Madeira tratada; cruzetas; resistência à flexão. AbstractPotenciality of treated wood crossarms use in Brazil. This paper presents data about the potential use of wood from Corymbia citriodora, Eucalyptus cloeziana and Eucalyptus dunnii species as crossarm used on utility poles. Results presents the productive process efficiency of each specie, with mechanical properties analysis, a study of Chromated Copper Arsenate (CCA) preservative penetration in the wood and economic and functional considerations about wood as material. The Corymbia citriodora presented the highest performance, with a yield of 75%, followed by Eucalyptus cloeziana, with 42%. The specie Eucalyptus dunnii was disqualified due to a very low yield, of only 7%.The bending strength test revealed that Corymbia citriodora and Eucalyptus cloeziana attended the resistance requirements of the Brazilian Standard NBR 8458/1984. There was total penetration of CCA in the sapwood of the specie Corymbia citriodora which, with its heartwood natural resistance and production efficiency, classifies this species as the best among the ones studied. Based on the results, it is possible to conclude that the use of wood as material to crossarms in Brazil is viable, and less harmful to the environment, since it is a natural and renewable resource. Keywords: Treated wood; crossarms; bending strength.

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Couic-Marinier, Françoise, Dominique Laurain-Mattar i Nathalie Koziol. "Huile essentielle de Corymbia citriodora". Actualités Pharmaceutiques 57, nr 577 (czerwiec 2018): 55–56. http://dx.doi.org/10.1016/j.actpha.2018.04.012.

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SIDANA, JASMEEN, DINESH NEERADI, ALKA CHOUDHARY, SUSHMA SINGH, WILLIAM J. FOLEY i INDER PAL SINGH. "Antileishmanial polyphenols from Corymbia maculata". Journal of Chemical Sciences 125, nr 4 (lipiec 2013): 765–75. http://dx.doi.org/10.1007/s12039-013-0440-8.

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Weirich, Sidinei Wolnei, Rodrigo Ferreira da Silva, Edison Rogerio Perrando, Clovis Orlando Da Ros, Alex Dellai, Douglas Leandro Scheid i Helena Wichineski Trombeta. "INFLUÊNCIA DE ECTOMICORRIZAS NO CRESCIMENTO DE MUDAS DE Eucalyptus grandis, Corymbia citriodora, Eucalyptus saligna E Eucalyptus dunnii". Ciência Florestal 28, nr 2 (29.06.2018): 765. http://dx.doi.org/10.5902/1980509832129.

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A associação ectomicorrízica beneficia as plantas ao proporcionar aumento na área de absorção radicular obtendo mais nutrientes e água, podendo possibilitar o crescimento do hospedeiro em solos submetido a condições adversas. O objetivo deste trabalho foi avaliar o efeito de diferentes isolados ectomicorrízicos no crescimento das mudas de Eucalyptus grandis W. Hill ex Maid., Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson, Eucalyptus saligna Sm. e Eucalyptus dunnii Maiden. O delineamento foi inteiramente casualizado em arranjo fatorial 4 x 4, sendo quatro espécies de eucalipto (Eucalyptus grandis, Corymbia citriodora, Eucalyptus saligna e Eucalyptus dunnii) e quatro isolados de inóculos ectomicorrízicos (UFSC-Pt116 (Pisolithus microcarpus (Cooke & Massee) Cunn), UFSC-132 (Pisolithus tinctorius (Pers.) Coker & Couch), UFSC-121, e sem inoculação), com 12 repetições. Após três meses de condução do experimento foram avaliados: percentual de colonização ectomicorrízica, altura de planta; diâmetro do colo; número de folhas; massa seca da parte aérea e radicular. Também foram calculadas as relações: massa seca aérea/massa seca radicular, altura/diâmetro do colo e o índice de qualidade de Dickson. A altura de planta, número de folhas e a massa seca aérea apresentaram médias superiores nas espécies Eucalyptus dunnii e Corymbia citriodora, quando na inoculação com UFSC-132. A inoculação com UFSC-Pt116 resultou em 63,3% de raízes colonizadas em Corymbia citriodora, enquanto Eucalyptus dunnii inoculado com UFSC-121 teve 67,7% de suas raízes colonizadas. O isolado ectomicorrízico UFSC-132 proporciona maior crescimento de mudas de Eucalyptus dunnii e Corymbia citriodora em relação à testemunha sem inoculação.

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Pradela, V. A., A. M. Lapaz, C. H. P. Yoshida, A. B. Nicolai, K. A. M. Silva i R. S. Tomaz. "FERTILIZAÇÃO COM BORO EM PLÂNTULAS DE Corymbia citriodora / FERTILIZATION WITH BORON IN Corymbia citriodora SEEDLINGS". Revista Brasileira de Engenharia de Biossistemas 12, nr 4 (19.12.2018): 361. http://dx.doi.org/10.18011/bioeng2018v12n4p361-367.

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Shepherd, Mervyn, Shabana Kasem, David J. Lee i Robert Henry. "Mapping species differences for adventitious rooting in a Corymbia torelliana × Corymbia citriodora subspecies variegata hybrid". Tree Genetics & Genomes 4, nr 4 (19.03.2008): 715–25. http://dx.doi.org/10.1007/s11295-008-0145-1.

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Subhan, Mishal, Rani Faryal i Ian Macreadie. "Utilization of an Industry Byproduct, Corymbia maculata Leaves, by Aspergillus terreus to Produce Lovastatin". Bioengineering 7, nr 3 (30.08.2020): 101. http://dx.doi.org/10.3390/bioengineering7030101.

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Due to its ability to lower cholesterol levels, simvastatin is a leading drug for the prevention of strokes and heart disease: it also lowers the incidence of neurodegenerative diseases. Simvastatin is made from lovastatin, a precursor produced by the industrial fungus, Aspergillus terreus. In this study, Corymbia maculata leaves were tested as a novel substrate for the growth of a new isolate of A. terreus and a lovastatin-resistant strain of A. terreus to produce lovastatin. Corymbia maculata (spotted gum) is well utilized by forest industries as a source of timber because of its high strength, durability and smooth texture. However, the leaves are a major waste product. Growth of A. terreus on Corymbia maculata leaves, in solid-state fermentation resulted in the production of lovastatin. Fermentation of media using fresh leaves of Corymbia maculata produced more lovastatin (4.9 mg g−1), than the sun-dried leaves (3.2 mg g−1). Levels of lovastatin were further increased by the lovastatin-resistant strain of A. terreus (Lvs-r), which produced twice the amount of the parental strain. The production of lovastatin was confirmed by HPLC and LC–MS/MS studies. The study suggests that the utilization of a cheap substrate for the production of lovastatin can have a potential economic benefit.

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Araujo, Marcio José de, David John Lee, Evandro Vagner Tambarussi, Rinaldo Cesar de Paula i Paulo Henrique Müller da Silva. "Initial productivity and genetic parameters of three Corymbia species in Brazil: designing a breeding strategy". Canadian Journal of Forest Research 51, nr 1 (styczeń 2021): 25–30. http://dx.doi.org/10.1139/cjfr-2019-0438.

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The survival, initial productivity, and the genetic parameters of Corymbia citriodora subsp. citriodora (CCC), Corymbia citriodora subsp. variegata (CCV), and Corymbia torelliana (CT) were used to develop a breeding strategy for the Corymbia species. Survival, height, and diameter at breast height (DBH) data were assessed 24 and 36 months after planting, and the mean annual volume increment was estimated in three trials. Longitudinal DBH data analysis was applied individually to each trial to identify the best and the poorest families at both ages. The mortality ranged from 5% in CT to 27% in CCC, and the mean annual increment varied from 17.8 to 20 m3·ha−1·year−1 at 36 months after planting. The 36-month narrow-sense heritability [Formula: see text] was high for CCV (0.69 ± 0.17), moderate for CCC (0.41 ± 0.11), and low for CT (0.21 ± 0.09). The genetic parameters indicated the need for different breeding strategies for each species. Selecting the best families while roguing the poor families allowed forward selection of CCC and CCV. It was possible to select good CT trees for hybrid breeding; however, improving the species population requires focusing on increasing the effective size and expanding the genetic variability in the CT population.

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Parra-O., Carlos, Michael J. Bayly, Andrew Drinnan, Frank Udovicic i Pauline Ladiges. "Phylogeny, major clades and infrageneric classification of Corymbia (Myrtaceae), based on nuclear ribosomal DNA and morphology". Australian Systematic Botany 22, nr 5 (2009): 384. http://dx.doi.org/10.1071/sb09028.

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Phylogenetic relationships of sections and species within Corymbia (Myrtaceae), the bloodwood eucalypts, were evaluated by using combined analyses of nuclear rDNA (ETS + ITS) and morphological characters. Combining morphological characters with molecular data provided resolution of relationships within Corymbia. The analyses supported the monophyly of the genus and recognition of the following two major clades, treated here as new subgenera: subgenus Corymbia, including informal sections recognised by Hill and Johnson (1995), namely Rufaria (red bloodwoods), Apteria and Fundoria; and subgenus Blakella, including sections Politaria (spotted gums), Cadagaria, Blakearia (paper-fruited bloodwoods or ghost gums) and Ochraria (yellow bloodwoods). Hill and Johnson’s section Rufaria is monophyletic if Apteria and Fundoria are included. It is evident that, among the red bloodwoods, series are not monophyletic and several morphological characters result from convergent evolution. There was strong morphological and molecular evidence that the three species of red bloodwoods that occur in south-western Western Australia (series Gummiferae: C. calophylla and C. haematoxylon, and series Ficifoliae: C. ficifolia) form a monophyletic group, separate from the eastern C. gummifera (series Gummiferae), which is probably sister to the clade of all other red bloodwoods. Phylogenetic results supported recognition of new taxonomic categories within Corymbia, and these are formalised here.

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Peres, Letícia Costa, Angélica de Cássia Oliveira Carneiro, Clarissa Gusmão Figueiró, Lucas De Freitas Fialho, Marcela Ferreira Gomes i Brígida Maria Dos Reis Teixeira Valente. "Clonal selection of Corymbia for energy and charcoal production". Advances in Forestry Science 6, nr 3 (1.11.2019): 749. http://dx.doi.org/10.34062/afs.v6i3.8293.

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The genus Corymbia appears as an option to produce best quality charcoal. The selection of genotypes through multivariate analysis can be a solution when multiple variables influence the result. The aim of this study was to characterize eight genotypes of Corymbia citriodora x Corymbia torelliana for energy and charcoal production, group and indicate the genetic materials with highest potential. The woods specific gravity, high heating value and energy density was determined. Energy density was grouped by the Scott-Knott test; group 1 was appointed for energy generation. The wood was carbonized. Charcoal yield, density, fixed carbon, friability, higher heating value, ash content, fixed carbon yield and energy density were determined. Principal component analysis was performed. Principal component 3 was chosen, as the representation of the ideal genetic material. The scores were calculated, and genetic materials III, VI and VIII are selected for charcoal production. The selection has shown to be efficient.

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Trueman, Stephen, Cao Hung i Ivar Wendling. "Tissue Culture of Corymbia and Eucalyptus". Forests 9, nr 2 (9.02.2018): 84. http://dx.doi.org/10.3390/f9020084.

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Silva, Paulo Henrique Müller da, Rinaldo Cesar de Paula, Aline Cristina Miranda, Mario Luiz Teixeira de Moraes, Edson Luiz Furtado, Cristiane De Pieri, Jeremy Branwer i David Lee. "Screening of rust and gall wasp in eucalypts species and provenances". Pesquisa Florestal Brasileira 35, nr 83 (30.09.2015): 323. http://dx.doi.org/10.4336/2015.pfb.35.83.746.

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Foi avaliada a ferrugem e a vespa da galha em táxons de eucalipto não comerciais com potencial para hibridização. Nós selecionamos 38 genótipos de 18 espécies dos gêneros Corymbia e Eucalyptus (Symphyomyrtus). Foram avaliadas duas inoculações de ferrugem com esporos provenientes de jambo e eucalipto e a ocorrência natural da vespa da galha em condições de alta infestação. Observou-se maior suscetibilidade à ferrugem em Corymbia do que em Eucalyptus e respostas diferentes às fontes de inóculo. Espécies das seções Latoangulatae e Exsertaria foram mais suscetíveis à vespa, e as espécies que pertencem ao gênero Corymbia não apresentaram desenvolvimento de galha.

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De Araujo, Raquel Fernandes, Eraldo Aparecido Trondoli Matricardi i Mauro Eloi Nappo. "ZONEAMENTO ECOLÓGICO DE PEQUENA ESCALA PARA ESPÉCIES FLORESTAIS TRADICIONAIS NO DISTRITO FEDERAL". FLORESTA 42, nr 2 (14.05.2012): 421. http://dx.doi.org/10.5380/rf.v42i2.19570.

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Neste estudo foram analisadas variáveis biofísicas para definir áreas potenciais para o plantio de espécies florestais tradicionais no território do Distrito Federal. As espécies testadas foram Pinus caribaea Morelet var. caribaea, P. caribaea Morelet var. hondurensis (Sénécl.) W. H. G. Barrett & Golfari, P. caribaea Morelet var. bahamensis (Griseb.) W. H. G. Barrett & Golfari, P. elliottii Engelm. var. elliottii, Eucalyptus camaldulensis Dehnh., E. urophylla S. T. Blake, E. grandis W. Hill, Corymbia citriodora (Hook.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus citriodora), C. torelliana (F. Muell.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus torelliana), Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg.e Tectona grandis L. f. Para identificar as áreas aptas para a implantação dos povoamentos florestais, foi realizada a sobreposição de variáveis do meio físico do Distrito Federal com variáveis relacionadas às exigências adaptativas de cada espécie estudada. Com base nos resultados desta pesquisa, as espécies que apresentaram potencial para cultivo nas condições físicas do Distrito Federal foram as três variedades de Pinus caribaea, P. elliottii var. elliottii, Eucalyptus camaldulensis, E. urophylla, E. grandis e Corymbia citriodora. As espécies Corymbia torelliana, Hevea brasiliensis e Tectona grandis não apresentaram potencial para o cultivo.Palavras-chave:Silvicultura; sistema de informação geográfica. AbstractSmall scale ecological zoning of Distrito Federal, Brazil, for traditional forest species. This study evaluated biophysical variables to identify suitable areas of the Distrito Federal for planting traditional tree species. The studied tree species included Pinus caribaea Morelet var. caribaea, P. caribaea Morelet var. hondurensis (Sénécl.) W. H. G. Barrett & Golfari, P. caribaea Morelet var. bahamensis (Griseb.) W. H. G. Barrett & Golfari, P. elliottii Engelm. var. elliottii, Eucalyptus camaldulensis Dehnh., E. urophylla S. T. Blake, E. grandis W. Hill, Corymbia citriodora (Hook.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus citriodora), C. torelliana (F. Muell.) K. D. Hill & L. A. S. Johnson (ex Eucalyptus torelliana), Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. and Tectona grandis L. f.Suitable areas for the studied tree species were identified by overlapping biophysical variables of the Distrito Federal, wich included adaptive tree requirements and site characteristics.Based on this research results, the territory of the study area is suitable for cultivation of three varieties of Pinus caribaea, P. elliottii var. elliottii, Eucalyptus camaldulensis, E. urophylla, E. grandis and Corymbia citriodora. There were no suitable areas for cultivation of Corymbia torelliana, Hevea brasiliensis and Tectona grandis.Keywords: Silviculture; geographic information system.

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Sale, MM, BM Potts, AK West i JB Reid. "Relationships within Eucalyptus (Myrtaceae) using PCR-amplification and southern hybridisation of chloroplast DNA". Australian Systematic Botany 9, nr 3 (1996): 273. http://dx.doi.org/10.1071/sb9960273.

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Chloroplast DNA based phylogenetic studies using PCR-amplification and digestion (40 species) combined with Southern blotting (23 species) suggest that Angophora and some representatives of the Eucalyptus subgenera Corymbia and Blakella form a monophyletic group. The subgenera Eudesmia, Monocalyptus, Gaubaea, Idiogenes, Symphyoinyrtus and Telocalyptus appear to form a well defined monophyletic group encompassing most of Eucalyptus, but the exact sister taxon to this group remains unresolved. The results suggest that subgenera Corymbia and Blakella are paraphyletic and that Telocalyptus should be submerged within the subgenus Symnphyoinyrtus.

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Brooker, M. I. H. "A new classification of the genus Eucalyptus L'Hér. (Myrtaceae)". Australian Systematic Botany 13, nr 1 (2000): 79. http://dx.doi.org/10.1071/sb98008.

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A new formal classification of the genus Eucalyptus is presented. It divides the genus into seven polytypic subgenera: E. subg. Angophora, E. subg. Corymbia, E. subg. Blakella, E. subg. Eudesmia, E . subg. Symphyomyrtus, E. subg. Minutifructa and E. subg. Eucalyptus, and six monotypic subgenera: E. subg. Acerosa, E. subg. Cruciformes, E. subg. Alveolata, E. subg. Cuboidea, E. subg. Idiogenes and E. subg. Primitiva. The system is intentionally phylogenetic, proceeding from the generally assumed primitive ‘apples’ (E. subg. Angophora) and bloodwoods (E. subg. Corymbia) to the most advanced and modified group, the monocalypts (E. subg. Eucalyptus). The genus Corymbia Hill & Johnson is subsumed under Eucalyptus and is represented by E. subg. Corymbia (the bloodwoods) and E. subg. Blakella (the ghostgums).New infrageneric taxa are diagnosed and their names typified, while brief digests in English are given for established taxa. Three species of the former genus Angophora have names with epithets preoccupied by names of other Eucalyptus species and new names are presented for them. The study is introduced by a brief historical summary of previous work in Eucalyptus, an apologia for the inclusion of Angophora, the reason for requirement of a new classification and notes on the nomenclature used. A new infrageneric rank, ‘supraspecies’, is introduced and is intentionally divorced in application (as a rank) from the similar sounding ‘superspecies’. All species recognised by the author are named and assigned in this system.

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Coelho, João Antônio da Silva, Cristiane Ramos Vieira i Oscarlina Lúcia dos Santos Weber. "Growth and nutrition of Corymbia citriodora seedlings using doses of liquid swine waste". Comunicata Scientiae 8, nr 2 (1.02.2018): 256–64. http://dx.doi.org/10.14295/cs.v8i2.1851.

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The experiment was installed in a greenhouse with the aimed to verify the influence of liquid swine waste in the development and nutrition of Corymbia citriodora seedlings. The swine waste was mixed with a commercial substrate in order to analyze the effects of five doses, in a randomized block design, considering the N requirement of the species, which were T1 – 0%; T2 – 50%; T3 – 100%; T4 – 150% and; T5 – 200% and one treatment with mineral fertilization for comparison. The Corymbia citriodora seeds were germinated in plastic tubes with a commercial substrate plus swine waste. As the seedlings reached about five centimeters the thinning was performed, and when the plants reached 15 cm in length the growth analysis was started. At the end of the experiment the seedlings were measured, weighed and milled for macro and micronutrients determination. The best doses of liquid swine waste were 150% and 200% which showed the highest growth average values of the Corymbia citriodora seedlings, to the detriment of the nutritional and physical improvement of the substrate.

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Jones, M. E., R. L. Stokoe, M. J. Cross, L. J. Scott, T. L. Maguire i M. Shepherd. "Isolation of microsatellite loci from spotted gum (Corymbia variegata ), and cross-species amplification in Corymbia and Eucalyptus". Molecular Ecology Notes 1, nr 4 (grudzień 2001): 276–78. http://dx.doi.org/10.1046/j.1471-8278.2001.00105.x.

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Barbour, R. C., A. C. Crawford, M. Henson, D. J. Lee, B. M. Potts i M. Shepherd. "The risk of pollen-mediated gene flow from exotic Corymbia plantations into native Corymbia populations in Australia". Forest Ecology and Management 256, nr 1-2 (lipiec 2008): 1–19. http://dx.doi.org/10.1016/j.foreco.2008.03.028.

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Berti Filho, Evoneo, Valmir Antonio Costa i John LaSalle. "PRIMEIRO REGISTRO DE VESPA-DA-GALHA, Epichrysocaris burwelli (HYMENOPTERA: EULOPHIDAE) EM Corymbia (Eucalyptus) CITRIDORA (Myrtaceae) NO BRASIL". BRAZILIAN JOURNAL OF AGRICULTURE - Revista de Agricultura 79, nr 3 (23.11.2015): 363. http://dx.doi.org/10.37856/bja.v79i3.1394.

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Hartmann, Maurício, i Eder Marques. "Germination of Corymbia citriodora on different substracts". Revista Agraria Academica 4, nr 4 (1.07.2021): 23–30. http://dx.doi.org/10.32406/v4n4/2021/23-30/agrariacad.

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The objective of the present work was to evaluate the germination of lemon-scented gum (Corymbia citriodora) on different substrates. The following were tested: 1) commercial substrate, 2) sand, 3) sand + coconut fiber (2: 1), 4) coconut fiber, 5) substrate + coconut fiber (2: 1), 6) sand + substrate (2: 1) and the control treatment (germitest paper). Based on the experiment, it was observed that germination varied between 57 and 74%, although there was no significant difference between treatments. The treatments that led to a higher germination speed were the control (germitest paper), followed by the commercial substrate, coconut fiber, sand + substrate and substrate + fiber, with no significant difference, indicating that they are the best for the germination of C. citriodora seeds. The substrate based on coconut fiber is promising, as it can be considered an alternative and low-cost substrate.

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Dickinson, G. R., H. M. Wallace i D. J. Lee. "Controlled Pollination Methods for Creating Corymbia Hybrids". Silvae Genetica 59, nr 1-6 (1.12.2010): 233–41. http://dx.doi.org/10.1515/sg-2010-0028.

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AbstractInter-specific Corymbia hybrids are of increasing interest to plantation forestry, yet there is little knowledge of the most suitable controlled pollination methods for this genus. Inter-specific crosses were made between C. torelliana [CT(maternal parent)] and C. citriodora subsp. variegata (CCV), C. henryi (CH) and C. citriodora subsp. citriodora (CCC) using conventional pollination, one-stop pollination (OSP) and artificially-induced protogyny on yellow buds (AIP Y) pollination methods. Additional treatments included AIP on green buds (AIP G) and the use of exclusion bags for the OSP and AIP methods. Inter-specific hybrids (CT x CCV, CT x CH and CT x CCC) were successfully created using all three pollination methods. The AIP Y treatment provided the highest seed yields and achieved time savings of >41% over the conventional and OSP methods, resulting in up to five-fold increases in operator productivity. However, the AIP Y treatment also had the highest C. torelliana contamination levels (9.3-13.2%). The use of exclusion bags with the AIP method had minimal effect on contamination rates, indicating a high proportion of selfpollen contamination. Contamination rates varied between maternal parents, suggesting variation in selfcompatibility for C. torelliana individuals. AIP using semi-ripe green buds was not effective at reducing selfing and had low operator productivity. The AIP method is suitable for use in a large-scale hybrid breeding program for C. torelliana. When self-pollination effects are managed, it could greatly reduce the costs associated with the production of seed of elite family crosses for commercial forestry deployment.

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Abasolo, Myralyn, David J. Lee, Carolyn Raymond, Roger Meder i Mervyn Shepherd. "Deviant near-infrared spectra identifies Corymbia hybrids". Forest Ecology and Management 304 (wrzesień 2013): 121–31. http://dx.doi.org/10.1016/j.foreco.2013.04.040.

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Steane, Dorothy A., Dean Nicolle, Gay E. McKinnon, René E. Vaillancourt i Brad M. Potts. "Higher-level relationships among the eucalypts are resolved by ITS-sequence data". Australian Systematic Botany 15, nr 1 (2002): 49. http://dx.doi.org/10.1071/sb00039.

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This expanded survey of ITS sequences represents the largest analysis of molecular data ever attempted on Eucalyptus. Sequences of the internal transcribed spacer (ITS) region of the nuclear ribosomal DNA were included in an analysis of 90 species of Eucalyptus s.s. and 28 species representing eight other genera (Allosyncarpia, Angophora, Arillastrum, Corymbia, Eucalyptopsis, Stockwellia, Lophostemon and Metrosideros). The results of the study indicate that Angophora and Corymbia form a well-supported clade that is highly differentiated from Eucalyptus s.s. Corymbia species are divided between two clades, one of which may be the sister to Angophora. Allosyncarpia, Arillastrum, Eucalyptopsis and ‘Stockwellia’ are also highly differentiated from Eucalyptus s.s. If the genus Eucalyptus is to be expanded to include Angophora and Corymbia(sensu Brooker 2000), ITS data suggest that Allosyncarpia, Eucalyptopsis, ‘Stockwellia’ and potentially Arillastrum should also be included in Eucalyptus s.l. The ITS data suggest that subg. Symphyomyrtus is paraphyletic and that subg. Minutifructus should be included within it. Within subg.Symphyomyrtus, only sect. Maidenaria appears to be monophyletic. Sections Adnataria and Dumaria are probably monophyletic; sections Exsertaria and Latoangulatae are very close and probably should be combined in a single section. Section Bisectae is polyphyletic and is divided into two distinct lineages. The phylogenetic groups depicted by ITS data are consistent with the frequency of natural inter-specific hybridisations as well as data from controlled crosses within subgenus Symphyomyrtus. The ITS data illustrate that subg. Idiogenes and western Australian monocalypts are early evolutionary lines relative to E. diversifolia, E. rubiginosa (monotypic subg. Primitiva) and the eastern monocalypts and that subg. Primitiva should be sunk into subg. Eucalyptus. Subgenus Eudesmia may be monophyletic, grouping with subgenera Idiogenes and Eucalyptus. Further work is required to confirm the phylogenetic positions of the monotypic subgenera Alveolata, Cruciformes, Acerosae and Cuboidea.

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Sampson, Jane, Sarah Tapper, David Coates, Margaret Hankinson, Shelley McArthur i Margaret Byrne. "Genetic diversity and differentiation in south-western Australian bloodwoods (". Australian Journal of Botany 70, nr 2 (16.02.2022): 146–57. http://dx.doi.org/10.1071/bt21081.

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An understanding of how variation is shared within and among closely related species is important for understanding evolutionary processes and managing biological diversity. We studied genetic structure in the three species occurring in south-western Australia that form the small and distinct monophyletic section Calophyllae of the genus Corymbia. We compared diversity in nuclear microsatellites and chloroplast DNA sequences in two species with patchy distributions, namely, Corymbia haematoxylon (Maiden) K.D. Hill & L.A.S. Johnson and Corymbia ficifolia (F. Muell.) K.D. Hill & L.A.S. Johnson, with that in the widespread congener, C. calophylla (Lindl.) K.D. Hill & L.A.S. Johnson. Consistent with predictions for the influence of range and abundance on genetic structure in the Australian flora, population differentiation was higher in the two restricted patchy species than in the widespread, semicontinuous C. calophylla. Genetic diversity in C. haematoxylon was similar to that in C. calophylla, but diversity was lower in the highly localised C. ficifolia, likely owing to genetic bottlenecks. All three species were distinguished by nuclear SSR variation, but C. haematoxylon and C. ficifolia each shared chloroplast haplotypes with C. calophylla from incomplete lineage sorting of ancestral variation and introgression. Limited evidence of recent hybridisation in two populations of C. haematoxylon was also present.

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Carvalho, Alexandre Monteiro, Maria da Penha Moreira Gonçalves, Kelysson de Freitas Amparado, João Vicente de Figueiredo Latorraca i Rosilei Aparecida Garcia. "Correlações da altura e diâmetro com tensões de crescimento em árvores de Corymbia citriodora e Eucalyptus urophylla". Revista Árvore 34, nr 2 (kwiecień 2010): 323–31. http://dx.doi.org/10.1590/s0100-67622010000200015.

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O uso múltiplo das florestas plantadas pelo setor industrial de base florestal vem aumentando gradativamente. Hoje, a utilização da madeira de eucalipto para fins mais nobres já é uma realidade. Porém, algumas limitações como a presença de tensões de crescimento são responsáveis por grandes perdas no setor. As tensões de crescimento geram rachaduras de topo em toras e tábuas e também empenamentos nas peças após o desdobro. Dentro desse contexto, este trabalho objetivou avaliar essas tensões em diferentes classes diamétricas e alturas, em indivíduos de Corymbia citriodora e Eucalyptus urophylla, usando o método não destrutivo da medição da deformação residual longitudinal (DRL), ao redor da circunferência dos troncos das árvores. As deformações residuais longitudinais, associadas às tensões de crescimento para Corymbia citriodora e Eucalyptus urophylla, respectivamente, foram, em média, de 0,106 e 0,092 mm. O efeito da classe diamétrica em Corymbia citriodora evidenciou correlação negativa significativa com a DRL, enquanto a altura não mostrou qualquer tendência quando relacionada com a DRL dessa espécie. Em Eucalyptus urophylla foi possível observar que tanto a correlação com o diâmetro à altura do peito (DAP) quanto com a altura foi significativa, apresentando coeficientes negativos, ou seja, as tensões de crescimento foram menores em árvores com maiores DAP e maiores alturas.

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Lisboa, Lucas Aparecido Manzani, Allan De Marcos Lapaz, Thadeu Henrique Novais Spósito, Ronaldo Da Silva Viana i Paulo Alexandre Monteiro De Figueiredo. "GROWTH, DEVELOPMENT AND FOLIARY ULTRASTRUCTURAL PARAMETERS OF DIFFERENT EUCALYPTUS GENETIC MATERIALS". FLORESTA 49, nr 1 (17.12.2018): 021. http://dx.doi.org/10.5380/rf.v49i1.52527.

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Currently eucalyptus is used as raw material in different industrial segments. The aim of this study was to evaluate the growth, development and ultrastructural parameters in different eucalyptus genetic materials. The randomized block experiment was carried out in ten treatments and five replicates, with different genetic materials: six hybrids:I-144; H-13; 110; NA-151; NA-189 (Eucalyptus urophilla S. T. Blake x Eucalyptus grandis W. Hill); Grancam 1277 (Eucalyptus grandis W. Hill x Eucalyptus camaldulensis Dehnh.); and four pure genetic materials:0020 (Eucalyptus saligna Sm.); 0010 (Eucalyptus resinífera Sm.); Eucalyptus pellita F. Muell. and Corymbia torelliana (F. Muell.) K. D. Hill & L. A. S. Johnson.Approximately four years after planting, the following variables were determined: plant height (AP), diameter at breast height (DAP), spad index (ISPAD), adaxial cuticle thickness (ECAD), abaxial cuticle thickness (ADX), abaxial epidermal thickness (EEAB), xylem diameter (DX), phloem diameter (DF) and palisade parenchyma length (CPP).The materials NA - 151 (Eucalyptus urophilla x E. grandis) and Grancam 1277 (E. grandis x E. camaldulensis) presented higher plant height (AP). The materials 0020 (E. saligna); 0010 (E. resinífera) and Corymbia torelliana presented smaller diameter at breast height (DAP). In general, the Corymbia torelliana genetic material had the lowest values in the ultrastructural foliar parameters

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Carnegie, Angus J., Huiquan Bi, Scott Arnold, Yun Li i Doug Binns. "Distribution, host preference, and impact of parasitic mistletoes (Loranthaceae) in young eucalypt plantations in New South Wales, AustraliaThis article is one of a collection of papers based on a presentation from the Stem and Shoot Fungal Pathogens and Parasitic Plants: the Values of Biological Diversity session of the XXII International Union of Forestry Research Organization World Congress meeting held in Brisbane, Queensland, Australia, in 2005." Botany 87, nr 1 (styczeń 2009): 49–63. http://dx.doi.org/10.1139/b08-127.

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Mistletoe is a common sight in mature eucalypt trees in Australia, especially in remnant stands in agricultural and pastoral areas, where they have been associated with debility and death. We surveyed over 450 eucalypt plantations in New South Wales, Australia, for mistletoe, and report for the first time that mistletoe infestation is becoming a problem in young eucalypt plantations. Forty-three plantations were infected, but only 9 of these had levels of mistletoe of 20% or more trees infected; 4 had levels of 38%, 40%, 65%, and 68%. Mistletoe was observed in plantations ranging in age from 3–10 years old. Species of Corymbia ( Corymbia maculata (Hook.) K.D. Hill & L.A.S. Johnson and Corymbia citriodora subsp. variegata (F. Muell.) K.D. Hill & L.A.S. Johnson) were the most susceptible to mistletoe. The mistletoe species Dendrophthoe vitellina (F. Muell.) Tiegh. was commonly observed in plantations in both lower and upper northeast New South Wales, while Amyema bifurcata (Benth.) Tiegh. was only observed in the upper northeast. We observed a significant impact on growth of mistletoe, affecting tree growth as young as four years old. Simulated analysis indicated that mistletoe infection can reduce stand basal area by 10% and stand volume by 13%. However, the impact of mistletoe on tree growth was variable across space and time.

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Christoforo, André Luis, Sérgio Luiz Moni Ribeiro Filho, Túlio Hallak Panzera i Francisco Antonio Rocco Lahr. "Metodologia para o cálculo dos módulos de elasticidade longitudinal e transversal em vigas de madeira de dimensões estruturais". Ciência Rural 43, nr 4 (kwiecień 2013): 610–15. http://dx.doi.org/10.1590/s0103-84782013000400008.

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Este trabalhou objetiva apresentar uma metodologia analítica para o cálculo dos módulos de elasticidade longitudinal (E) e transversal (G) em vigas de madeira de dimensões estruturais, segundo o emprego das teorias de vigas de Euler Bernoulli e Timoshenko, sendo utilizado o ensaio de flexão estática a três pontos. As madeiras testadas foram o Pinus elliottii e a Corymbia citriodora. Os resultados encontrados relevaram ser o módulo de elasticidade longitudinal 18,70 vezes superior ao módulo transversal do Pinus elliottii e 21,2 superior ao módulo transversal do Corymbia citriodora, sendo estes compatíveis quando comparada a relação entre E e G estabelecida pela norma Brasileira ABNT NBR 7190:1997 (Projeto de Estruturas de Madeira), que define ser o módulo de elasticidade longitudinal vinte vezes superior ao transversal.

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Delucis, Rafael De Avila, i Darci Alberto Gatto. "Flexural properties of four fast-growing eucalypts woods deteriorated by three different field tests". Acta Scientiarum. Technology 39, nr 1 (24.02.2017): 39. http://dx.doi.org/10.4025/actascitechnol.v39i1.27067.

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Durability is a wood characteristic determined by several factors, making it difficult to investigate the service life of pieces designated for outdoor use. In this study, the decaying of juvenile and adult woods of four fast-growing eucalypts from southern Brazil subjected to three different exposure environments was monitored through mechanical properties (flexural test). The study material was obtained from adult trees of Eucalyptus botryoides, Corymbia citriodora, Eucalyptus paniculata and Eucalyptus tereticornis. Field tests were conducted in the city of Piratini, southern Brazil, and samplings were carried out during 540 days of experiment. Comparing the four eucalypts, the decreasing order of biological resistance was: Eucalyptus tereticornis, Corymbia citriodora, Eucalyptus paniculata and Eucalyptus botryoides. The mature wood showed greater and more stable physical-mechanical properties than juvenile wood.

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Bayly, Michael J. "Phylogenetic studies of eucalypts: fossils, morphology and genomes". Proceedings of the Royal Society of Victoria 128, nr 1 (2016): 12. http://dx.doi.org/10.1071/rs16002.

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The eucalypt group includes seven genera: Eucalyptus, Corymbia, Angophora, Eucalyptopsis, Stockwellia, Allosyncarpia and Arillastrum. Knowledge of eucalypt phylogeny underpins classification of the group, and facilitates understanding of their ecology, conservation and economic use, as well as providing insight into the history of Australia’s flora. Studies of fossils and phylogenetic analyses of morphological and molecular data have made substantial contributions to understanding of eucalypt relationships and biogeography, but relationships among some genera are still uncertain, and there is controversy about generic circumscription of the bloodwood eucalypts (genus Corymbia). Relationships at lower taxonomic levels, e.g. among sections and series of Eucalyptus, are also not well resolved. Recent advances in DNA sequencing methods offer the ability to obtain large genomic datasets that will enable improved understanding of eucalypt evolution.

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38

Smith, Karen, Peter May i Gregory Moore. "The Influence of Compaction and Soil Strength on the Establishment of Four Australian Landscape Trees". Arboriculture & Urban Forestry 27, nr 1 (1.01.2001): 1–7. http://dx.doi.org/10.48044/jauf.2001.001.

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Two experiments were conducted to test the hypothesis that trees able to establish in urban soils will have a higher-than-average tolerance to the higher mechanical impedance and soil strength of compacted soils. Experiment 1 tested the ability of the roots of Corymbia metadata (spotted gum, syn. Eucalyptus maculata), Lophostetnon confertus (brush box), Corymbia ficijolia (red flowering gum, syn. Eucalyptus ficifolia), and Agonis flexuosa (willow myrtle) seedlings to penetrate a sandy loam soil compacted to bulk densities of 1.4 and 1.8 mg • m~3 at 13% gravimetric moisture content. While roots of all species were able to penetrate the soil at the higher bulk density, total root penetration depth was reduced by 60% in all four species. Experiment 2 tested the ability of Corymbia maculata and C. ficijolia to penetrate soil compacted at bulk densities 1.4, 1.6, and 1.8 mg • m~3 at two moisture levels, 7% and 10% gravimetric moisture. At 7% moisture, both species were able to penetrate soil compacted to 1.4 and 1.6 mg • rrr3, but neither species was able to successfully penetrate soil compacted to 1.8 mg • m"3. At 10% moisture, both species were able to penetrate soil compacted to 1.4 and 1.6 mg • m~3. They also were able to successfully penetrate soil compacted to 1.8 mg • nr3, although with significantly less depth of penetration than at the two lower bulk densities.

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Lawag, Ivan, Md Islam, Tomislav Sostaric, Lee Lim, Katherine Hammer i Cornelia Locher. "Antioxidant Activity and Phenolic Compound Identification and Quantification in Western Australian Honeys". Antioxidants 12, nr 1 (12.01.2023): 189. http://dx.doi.org/10.3390/antiox12010189.

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This study reports on the total phenolic content and antioxidant activity as well as the phenolic compounds that are present in Calothamnus spp. (Red Bell), Agonis flexuosa (Coastal Peppermint), Corymbia calophylla (Marri) and Eucalyptus marginata (Jarrah) honeys from Western Australia. The honey’s total phenolic content (TPC) was determined using a modified Folin–Ciocalteu assay, while their total antioxidant activity was determined using FRAP and DPPH assays. Phenolic constituents were identified using a High Performance Thin-Layer Chromatography (HTPLC)-derived phenolic database, and the identified phenolic compounds were quantified using HPTLC. Finally, constituents that contribute to the honeys’ antioxidant activity were identified using a DPPH-HPTLC bioautography assay. Based on the results, Calothamnus spp. honey (n = 8) was found to contain the highest (59.4 ± 7.91 mg GAE/100 g) TPC, followed by Eucalyptus marginata honey (50.58 ± 3.76 mg GAE/100 g), Agonis flexuosa honey (36.08 ± 4.2 mg GAE/100 g) and Corymbia calophylla honey (29.15 ± 5.46 mg GAE/100 g). In the FRAP assay, Calothamnus spp. honey also had the highest activity (9.24 ± 1.68 mmol Fe +2/kg), followed by Eucalyptus marginata honey (mmol Fe +2/kg), whereas Agonis flexuosa (5.45 ± 1.64 mmol Fe +2/kg) and Corymbia calophylla honeys (4.48 ± 0.82 mmol Fe +2/kg) had comparable FRAP activity. In the DPPH assay, when the mean values were compared, it was found that Calothamnus spp. honey again had the highest activity (3.88 ± 0.96 mmol TE/kg) while the mean DPPH antioxidant activity of Eucalyptus marginata, Agonis flexuosa, and Corymbia calophylla honeys were comparable. Kojic acid and epigallocatechin gallate were found in all honeys, whilst other constituents (e.g., m-coumaric acid, lumichrome, gallic acid, taxifolin, luteolin, epicatechin, hesperitin, eudesmic acid, syringic acid, protocatechuic acid, t-cinnamic acid, o-anisic acid) were only identified in some of the honeys. DPPH-HPTLC bioautography demonstrated that most of the identified compounds possess antioxidant activity, except for t-cinnamic acid, eudesmic acid, o-anisic acid, and lumichrome.

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Nobakht, Motahareh, Tanja Grkovic, Stephen Trueman, Helen Wallace, Mohammad Katouli, Ronald Quinn i Peter Brooks. "Chemical Constituents of Kino Extract from Corymbia torelliana". Molecules 19, nr 11 (4.11.2014): 17862–71. http://dx.doi.org/10.3390/molecules191117862.

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Garcia, Rosilei Aparecida, Nathalia Silveira de Oliveira, Alexandre Miguel do Nascimento i Natália Dias de Souza. "Colorimetria de madeiras dos gêneros Eucalyptus e Corymbia e sua correlação com a densidade". CERNE 20, nr 4 (grudzień 2014): 509–17. http://dx.doi.org/10.1590/01047760201420041316.

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Conduziu-se, este estudo, com os objetivos de caracterizar a cor da madeira de Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson, Eucalyptus pellita F. Muell, Eucalyptus paniculata Sm. e Eucalyptus grandis Hill ex Maiden; e determinar sua correlação com a densidade da madeira, visando a avaliar o potencial da colorimetria como uma ferramenta para a identificação e qualificação da madeira. As análises colorimétricas foram realizadas segundo o sistema CIE L*a*b* com o auxílio do espectrofotômetro portátil CM 2600d da Konica Minolta. Os resultados indicaram diferenças significativas entre as densidades das espécies estudadas, sendo a madeira de Eucalyptus paniculata a mais densa e a madeira de Eucalyptus grandis a menos densa. As análises de correlação entre acor e a densidade monstraram que as madeiras mais densas, para as espécies do gênero Eucalyptus estudadas, são mais escuras (menor L*) e apresentam mais pigmento vermelho (a*) e amarelo (b*). Entretanto, o comportamento foi diferente para o Corymbia citriodora, cuja madeira apresentou alta densidade, cor clara e pouco pigmento vermelho, indicando que a combinação das variáveis colorimétricas e da densidade apresenta potencial para segregar a espécie Corymbia citriodora das demais espécies de Eucalyptus estudadas. As madeiras mais densas de Eucalyptus pellita são mais escuras na seção radial, enquanto que as madeiras de Eucalyptus paniculata apresentaram mais pigmento amarelo na seção tangencial. Cada espécie apresentou uma coloração específica, dada pelas variáveis colorimétricas, mostrando o potencial da colorimetria na identificação de madeiras

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Paes, Juarez Benigno, Pedro Gutemberg de Alcântara Segundinho, Allan Ewerton Rezende Euflosino, Márcio Rogério da Silva, Carlito Calil Junior i André Luis Christoforo. "BIOLOGICAL RESISTANCE OF THERMALLY TREATED Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson E Pinus taeda L. WOODS AGAINST XYLOPHAGOUS TERMITES". Revista Árvore 40, nr 3 (czerwiec 2016): 535–41. http://dx.doi.org/10.1590/0100-67622016000300017.

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ABSTRACT This research aimed to evaluate the effect of the thermal-treated temperature to improvement of Corymbia citriodora and Pinus taeda wood resistance to the xylophagous termite Nasutitermes corniger, into forced feeding assay. The wood thermally treated was performed at temperatures of 160, 180, 200, 220, 240ºC. For Pinus taeda, the temperature of 260ºC was also used. Three boards of 6 × 16 × 56 cm (thickness × width x length) were used for each temperature. After being thermally treated, the boards were transformed into samples of 2.54 × 2.54 × 0.64 cm (longitudinal × radial × tangential). The experiment was kept in a climatized room (25 ± 2ºC and 65 ± 5% of relative humidity), for 28 days. For Corymbia citriodora, the thermal treatment at 220 and 240ºC improved the resistance to the termite. For Pinus taeda, the resistance improvement occurred at 240 and 260ºC. The temperature of 160ºC caused a decrease in the natural durability of both species.

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Boland, DJ, i M. Sedgley. "Stigma and Style Morphology in Relation to Taxonomy and Breeding Systems in Eucalyptus and Angophora (Myrtaceae)". Australian Journal of Botany 34, nr 5 (1986): 569. http://dx.doi.org/10.1071/bt9860569.

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The stigma and style of 94 species of Eucalyptus and two species of Angophora were studied by scanning electron microscopy and/or light microscopy. All species had papillate stigmas and a stylar canal of varying length. Angophora species had mop-like stigmas with long papillae that were very similar in appearance to those of the red bloodwood group of the Corymbia, e.g. E. gummifera. The spotted gum group of the Corymbia had mop-like stigmas with short papillae and the yellow bloodwoods had tapered stigmas. The latter group was also charaderised by an extremely thick cuticle on the outer surface of the style, over 100 �m in thickness in E. watsoniana. All species in Blakella had tapered stigmas with a lobed surface and relatively few short papillae. The stylar canal had no cuticle in E. papuana. Eudesmia is a variable subgenus with E. erythrocorys unusual in having long multicellular papillae. Most Symphyomyrtus species had blunt or pinhead-shaped lobed stigmas with a heavily cutinised stylar canal. E. deglupta and E. microcorys did not conform to this pattern and had mop-shaped stigmas with long papillae. Monocalyptus species had blunt stigmas with few papillae and hollow styles and appeared to form a cohesive group. On the basis of stigma and style morphology Angophora is more similar to Corymbia than to Blakella. E. deglupta and E. microcorys are distinct from other Symphyomyrtus species studied. E. trachyphloia and E. jacobsiana are more similar to E. gummifera than to E. watsoniana or other yellow bloodwoods.

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Moura, Ana Cristina Torres, Solange Maria de França, Mariana Oliveira Breda, Regina Célia Zonta de Carvalho, José Claudio Barros Ferraz i Paulo Roberto Ramalho Silva. "Aphis gossypii Glover, 1877 e Aphis spiraecola Patch, 1914 (Hemiptera: Aphididae) associados a Eucalyptus spp." Ciência Florestal 32, nr 4 (23.11.2022): 2404–18. http://dx.doi.org/10.5902/1980509854632.

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No processo de produção de mudas de eucalipto ocorre um complexo de artrópodes, podendo destacar os insetos sugadores, como pulgões. Objetivou-se estudar pulgões em mudas e minicepas em minijardim clonal de eucalipto no Brasil, através de sua identificação, estudos de crescimento populacional e preferência hospedeira desses insetos em diferentes espécies de eucalipto. Neste estudo registra-se, pela primeira vez em Eucalyptus spp. no Brasil, as espécies Aphis gossypii Glover, 1887 e Aphis spiraecola Patch, 1914 (Hemiptera: Aphididae). Colônias de pulgões foram observadas em abril e março de 2018 infestando mudas de Eucalyptus pellita F. Muell e Eucalyptus brassiana S.T. Blake na casa de vegetação da Universidade Federal do Piauí (UFPI), em Teresina, Piauí; e em minijardim clonal de Eucalyptus spp. do viveiro de produção de mudas PlantBem, em Monsenhor Gil, Piauí. O crescimento populacional de Aphis spiraecola foi avaliado através da utilização da taxa instantânea de crescimento (ri) em seis espécies de eucalipto (Eucalyptus pellita, Eucalyptus grandis W.Hill ex Maiden, Eucalyptus brassiana, Eucalyptus urophylla S.T. Blake, Eucalyptus tereticornis Smith e Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson), assim como foi testada a preferência hospedeira do pulgão por essas espécies através de teste com chance de escolha. Apenas em Corymbia citriodora não houve crescimento populacional de A. spiraecola. Aphis spiraecola demonstrou menor preferência hospedeira por Corymbia citriodora, enquanto as espécies Eucalyptus pellita e Eucalyptus urophylla foram as preferidas. Este é o primeiro registro de Aphis gossypii em minijardim clonal de eucalipto e de Aphis spiraecola em mudas de Eucalyptus spp. no Brasil.

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Sá, Ariadne Felício Lopo de, Sérgio Valiengo Valeri, Mara Cristina Pessoa da Cruz, José Carlos Barbosa, Gustavo Machado Rezende i Matheus Pozzetti Teixeira. "Effects of potassium application and soil moisture on the growth of Corymbia citriodora plants". CERNE 20, nr 4 (grudzień 2014): 645–51. http://dx.doi.org/10.1590/01047760201420041422.

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The objective of this work was to evaluate the effects of potassium and soil moisture levels on the growth of Corymbia citriodora plants. Four doses of potassium were applied (0, 40, 80 and 120 mg.dm-3) and three soil moisture levels were established(50-80%, 65-80% and 80% of maximum soil field capacity). The experiment was a 4x3 factorial arrangement of treatments within a randomized complete design with six replications for each treatment and one pot with two plants for each plot. At 90 days after planting, the plant growth parameters: survival rate, height, stem diameter, leaf area, relative chlorophyll concentration, leaf dry mass, stem and branches dry mass, root dry mass, total dry mass and leaf macronutrient contents were measured. High soil moisture content is necessary for Corymbia citriodora seedlings at nursery stage. Effects of the K doses were not observed in plants, even when they were cultivated in a soil with a low content of this nutrient.

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González-Gaona, Ernesto, Héctor Silos-Espino, Catarino Perales- Segovia, José Saúl Padilla-Ramírez, Irma Guadalupe López-Muraira i Efraín Acosta-Díaz. "Control del clavo de la guayaba con extractos de plantas". Revista Mexicana de Ciencias Agrícolas 11, nr 2 (24.03.2020): 365–76. http://dx.doi.org/10.29312/remexca.v11i2.2071.

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Los extractos elaborados por maceración alcohólica presentaron la mayor inhibición del crecimiento del hongo P. clavispora con respecto de la maceración en agua o de la infusión. En bioensayos con extractos alcohólicos concentrados con rotovapor y filtrados, los extractos de jaral (Cistus sp.), aceitilla (Bidens odorata Cav.), mezquite (Prosopis laevigata Humb. & Bonpl. ex Willd.), paraíso (Melia azedarach L.), olivo (Olea europaea L.), trompillo (Solanum eleagnifolium Cav.), lantana (Lantana sp.), romero (Rosmarinus sp.), ruda (Ruta graveolens L.), venadilla (Bursera simaruba (L.) SARG.), lengua de vaca (Rumex crispus L.) y eucalipto australiano (Corymbia (=Eucalyptus) gummifera (Gaertn.) Hill & Johnson) mostraron reducciones del crecimiento del hongo, superiores al 90%. En campo, los extractos de plantas de eucalipto rojo (Eucalyptus camaldulensis) y eucalipto australiano (Corymbia gummifera) mostraron menores daños que los fungicidas de síntesis química evaluados. Lo anterior, indica que es factible el uso de estos extractos en el control del hongo P. clavispora, disminuyendo el impacto ambiental.

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Rockwood, Donald L., i Gary F. Peter. "Eucalyptus and Corymbia Species for Pulpwood, Mulchwood, Energywood, Windbreaks, and/or Phytoremediation". EDIS 2018 (6.09.2018): 6. http://dx.doi.org/10.32473/edis-fr013-2018.

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In Florida, Eucalyptus species grow faster than our native tree species. E. grandis (EG), E. grandis x E. urophylla (EH), E. benthamii (EB), and E. amplifolia (EA), in particular, are fast-growing trees that, when planted on suitable sites and managed properly, produce commercial products such as mulchwood, pulpwood, energywood, and bioproducts. Eucalyptus can also phytoremediate, i.e., remediate environmental problems (Table 1). Eucalyptus species are not invasive, having been planted commercially in Florida since the 1960s without spreading from managed plantations. EG and EA, along with Corymbia torelliana (CT), also may be used as windbreaks for citrus and vegetables. This circular describes potential applications and presents planting guidelines for these species. This 6-page fact sheet is a minor revision written by D. L. Rockwood and G. F. Peter, and publsihed by the School of Forest Resources and Conservation Department, July 2018. CIR1194/FR013: Eucalyptus and Corymbia Species for Mulchwood, Pulpwood, Energywood, Bioproducts, Windbreaks, and/or Phytoremediation (ufl.edu)

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Monteiro, Thiago Campos, José Tarcisio Lima, José Reinaldo Moreira da Silva, Raphael Nogueira Rezende i Ricardo Jorge Klitzke. "Water flow in different directions in Corymbia citriodora wood". Maderas. Ciencia y tecnología, ahead (2020): 0. http://dx.doi.org/10.4067/s0718-221x2020005000312.

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Pérez, Paula, Ubirajara Malavasi, Marlene Malavasi, Aletéia Lang i Karine Zachow. "Efeito de biossólido no crescimento inicial de Corymbia citriodora". Revista Ambiência 7, nr 1 (1.04.2011): 13–23. http://dx.doi.org/10.5777/ambiencia.2011.01.01.

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Choinski Jr, J. S., P. Ralph i D. Eamus. "Changes in photosynthesis during leaf expansion in Corymbia gummifera". Australian Journal of Botany 51, nr 1 (2003): 111. http://dx.doi.org/10.1071/bt02008.

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Growth, pigment levels and various photosynthesis parameters were measured in expanding leaves of Corymbia gummifera (Solander ex Gaertner) Hochreutiner. C. gummifera trees were studied growing in sandstone plateau woodland communities in Royal National Park, New South Wales, in a recently burned open habitat. Young leaves (horizontally oriented to maximise light exposure) were found to be conspicuously red until they reached approximately 75% of their full size. As the leaves expanded, anthocyanin content declined and chlorophyll levels proportionately increased. Young red leaves showed net negative carbon assimilation rates, although CO2 assimilation rate, transpiration rate, stomatal conductance, actual quantum yield of PSII (ΦPSII) and apparent electron transport rate (ETR) all increased in a similar pattern as the leaves expanded. Measurements of maximum quantum yield of dark-adapted leaves (Fv/Fm) were also correlated with leaf area. Younger leaves had lower Fv/Fm ratios than did mature leaves, whether measured at midday or 2 h after sunset, indicating that young leaves exhibited some degree of chronic photoinhibition. It is concluded that C. gummifera exhibits a transient red pattern of anthocyanin expression and that photosynthesis is limited in young leaves because of low stomatal conductance, low chlorophyll content, immature chloroplasts and an attenuation of light caused by anthocyanins.

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