Journal articles: 'Eucalyptus globulus'

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Demars, Valérie. "Eucalyptus globulus." Hegel N° 4, no. 4 (November 22, 2021): 369–75. http://dx.doi.org/10.3917/heg.114.0369.

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Ghedira, K., P. Goetz, and R. Le Jeune. "Eucalyptus globulus Labill." Phytothérapie 6, no. 3 (June 2008): 197–200. http://dx.doi.org/10.1007/s10298-008-0315-1.

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Xavier, Adelica Aparecida, Eugênio Von. Sanfuentes, Davi Theodoro Junghans, and Acelino Couto Alfenas. "Resitência de Eucalyptus globulus e Eucalyptus nitens à ferrugem (Puccinia psidii)." Revista Árvore 31, no. 4 (August 2007): 731–35. http://dx.doi.org/10.1590/s0100-67622007000400018.

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Avaliou-se a resistência das espécies de Eucalyptus globulus e Eucalyptus nitens inoculadas com um isolado uredinospórico monopustular de Puccinia psidii origininário de plantio de Eucalypstus grandis (UFV-2) em Itapetininga, SP. A avaliação foi realizada aos 12 dias após a inoculação, e quantificou-se a doença por meio de uma escala de notas com quatro classes de severidade da doença (S0, S1, S2 e S3). Em média, aproximadamente 60% das plantas de E. globulus e 50% de E. nitens foram resistentes a P. psidii. A variabilidade intra-específica nos materiais estudados indica ser possível a clonagem de genótipos resistentes para plantio comercial ou para uso em programas de melhoramento genético.

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Bauhus, Jürgen, Aaron P. van Winden, and Adrienne B. Nicotra. "Aboveground interactions and productivity in mixed-species plantations of Acacia mearnsii and Eucalyptus globulus." Canadian Journal of Forest Research 34, no. 3 (March 1, 2004): 686–94. http://dx.doi.org/10.1139/x03-243.

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This study compared productivity in mixed-species plantations of Eucalyptus globulus ssp. pseudoglobulus (Naudin ex Maiden) Kirkpatr. and Acacia mearnsii de Wild with pure stands of each species and investigated how this might be explained by canopy stratification between species and changes in leaf characteristics of eucalypts. Investigations were carried out at a trial using the replacement series design, which consisted of the following combinations: 100% eucalypts (100%E), 75% eucalypts + 25% acacia (75%E:25%A), 50% eucalypts + 50% acacia (50%E:50%A), 25% eucalypts + 75% acacia (25%E:75%A), and 100% acacia (100%A). At 9.5 years, stem volume and biomass were highest in 50%E:50%A treatments. Canopy stratification occurred in all mixtures, with acacias in the lower and eucalypts in the upper canopy stratum. This and the increasing canopy light interception with increasing proportion of acacia in the mixture indicated that A. mearnsii is substantially more shade tolerant than E. globulus. Midcanopy foliage of E. globulus in the 50%E:50%A mixture had higher foliage nitrogen (N) but lower phosphorus (P) concentrations and lower light-saturated net photosynthesis rates (Amax) than those in the 100%E treatment. In addition, similar relationships between eucalypt crown volume and stem biomass across treatments indicated that eucalypt crowns were not more efficient in mixture. Our study indicates that the productivity gains in these mixtures may be partially attributable to aboveground niche separation between species.

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Meddings, Rachel A., Jen A. McComb, Michael C. Calver, Sandra R. Thomas, and Richard A. Mazanec. "Eucalyptus camaldulensis × globulus hybrids." Australian Journal of Botany 51, no. 3 (2003): 319. http://dx.doi.org/10.1071/bt02088.

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Controlled pollination techniques were used to produce hybrids between Eucalyptus camaldulensis and E. globulus, with E. camaldulensis as the female parent. There were substantial barriers to hybridisation, with a 28% reduction in the percentage capsule set, a 78% reduction in the number of seeds produced per capsule, a 99% increase in the number of inviable abnormal seedlings and overall a 92% reduction in the number of normal seedlings produced per pollinated flower compared with outcrossed E. camaldulensis. The number of normal seedlings per pollinated flower varied from 0.1 to 4.7 and was most strongly affected by the source of the pollen. Selfing E. camaldulensis showed it to be partially self-incompatible, with a 29% reduction in the percentage capsule set and an 86% reduction in the number of seeds produced per capsule compared with outcrosses. One reciprocal combination of E. camaldulensis clones originating from Erudina and Broken Hill gave a very low seed�set.Cotyledon shape of the E. camaldulensis × globulus hybrids was intermediate between the two parents and an excellent way of checking that seedlings were hybrids. Shape and size of juvenile leaves did not distinguish the hybrids, but hybrid leaves started to change from being opposite and sessile to alternate and petiolate at a lower node than in the E. globulus parent, although not as quickly as for E. camaldulensis. In adult trees, although the hybrid leaves were longer than leaves of the parent species, it was difficult to identify the hybrids in the field on this basis. Flowers of the hybrid were more similar to E. camaldulensis, being in pedicellate clusters of 3–6. Flower size was intermediate between the parents (operculum height and width, stamen and style length). Fruits were also intermediate in size but valves were exserted as in E. camaldulensis. Hybrids were fertile and overlapped in flowering time with E. camaldulensis, so that if planted adjacent to natural stands of E. camaldulensis, some introgression may occur.

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Osawa, Kenji, Hideyuki Yasuda, Hiroshi Morita, Koichi Takeya, and Hideji Itokawa. "Eucalyptone from Eucalyptus globulus." Phytochemistry 40, no. 1 (September 1995): 183–84. http://dx.doi.org/10.1016/0031-9422(95)00233-w.

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Correia, Anne Caroline Guieiro, Aloisio Xavier, Poliana Coqueiro Dias, Miranda Titon, and Reynaldo Campos Santana. "REDUÇÃO FOLIAR EM MINIESTACAS E MICROESTACAS DE CLONES HÍBRIDOS DE Eucalyptus globulus." Revista Árvore 39, no. 2 (April 2015): 295–304. http://dx.doi.org/10.1590/0100-67622015000200009.

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O objetivo deste estudo foi avaliar o efeito da redução foliar no enraizamento de dois tipos (apicais e intermediárias) de miniestacas e microestacas de quatro clones híbridos de Eucalyptus globulus. Foram realizadas avaliações quanto ao percentual de sobrevivência, raízes emitidas na extremidade inferior do tubete, enraizamento, altura, diâmetro do colo e massa seca da parte aérea e da raiz. Aos 90 dias de idade, pôde-se concluir que as estacas apicais sem e com redução foliar foram superiores às intermediárias e os clones se comportaram de maneira diferenciada em relação ao enraizamento das miniestacas e microestacas. A propagação vegetativa por estacas apicais sem redução foliar pode ser recomendada para a produção de mudas de Eucalyptus urophylla x E. globuluse de Eucalyptus grandis x E. globulus.

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Eyles, Alieta, and Caroline Mohammed. "COMPARISON OF CEPA (2-CHLOROETHYL PHOSPHONIC ACID) INDUCED RESPONSES IN JUVENILE EUCALYPTUS NITENS, E. GLOBULUS AND E. OBLIQUA: A HISTOCHEMICAL AND ANATOMICAL STUDY." IAWA Journal 23, no. 4 (2002): 419–30. http://dx.doi.org/10.1163/22941932-90000312.

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Kino veins and/or pockets are a characteristic defect of some Eucalyptus species and have long been recognized as sources of degrade in eucalypt timber. In a comparative study, the course of both histochemical and anatomical responses of three juvenile Eucalyptus species (E. nitens, E. globulus and E. obliqua) to treatment with an ethylene-releasing compound, 2-chloroethyl phosphonic acid (CEPA), were examined. Kino veins were induced in both E. obliqua and E. globulus. The hormone treatment failed to induce kino vein formation in E. nitens. The traumatic parenchyma (that later differentiated into kino veins) was not always derived from the initials of the vascular cambium as reported in previous studies of E. globulus. Instead, the traumatic parenchyma appeared to be produced from the meristematic activity of the inner phloem parenchyma. In addition, kino veins found in 2- to 3-year-old E. globulus were mostly included in the phloem and not in the xylem as generally observed in mature E. globulus.

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Kamble, Ujwala B., V. J. Chaware, and V. K. Redasani. "Evaluation of Antidiabetic Potential of Eucalyptus Globulus Plant Extract In Alloxan-Induced Diabetic Rats." Asian Journal of Pharmaceutical Research and Development 9, no. 5 (October 15, 2021): 17–28. http://dx.doi.org/10.22270/ajprd.v9i5.1021.

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Objective: Evaluation of Antidiabetic Potential of Eucalyptus globules Plant Extract in Alloxan- Induced Diabetic Rats. Method: Methanolic leaves extract of Eucalyptus globulus plant was prepared by Soxhlet extraction method and stored in refrigerator at 4℃ for two days before use. Male Albino Wistar rats were made diabetic at the dose of Alloxan (150mg/kg/day i.p.). Methanolic leaves extract of Eucalyptus globulus plant (200mg/kg, 400mg/kg & 600mg/kg/day p.o.) was screened for antidiabetic activity. Standard drug Glibenclamide (0.5mg/kg/day i.p.) was administered to the second group of animals for 14 days. Blood glucose level and body weight of rats were recorded on Initial & Final days of treatment. Further hypoglycemic & OGTT evaluation were done. At the end of treatment biochemical estimations & histopathological examination of pancreas were also carried out. Result: The statistical data indicated, 14 Days oral administration of Methanolic leaves extract of Eucalyptus globulus plant caused a significant (????< 0.05) reductions in blood glucose level, hypoglycemicpotential, significant oral glucose tolerance &gain in body weight as compared with toxic control group. Further showed improvement in altered biochemical parameters associated with diabetes. Concurrent histopathological examination of pancreas of these animals showed regeneration by Methanolic leaves extract which were earlier necrosed by Alloxan. Conclusion: Results obtained in this study substantiate the Antidiabetic potential of Methanolic leaves extract of Eucalyptus globulus plant the source of Ellagitannins a bioactive polyphenol and could be considered for further evaluation in clinical studies and drug development.

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Pound, L. M., M. A. B. Wallwork, B. M. Potts, and M. Sedgley. "Self-incompatibility in Eucalyptus globulus ssp. globulus (Myrtaceae)." Australian Journal of Botany 50, no. 3 (2002): 365. http://dx.doi.org/10.1071/bt01076.

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Controlled pollinations with self- and cross-pollen were applied to individual flowers of five mature Eucalyptus globulus Labill. ssp. globulus trees to investigate the site of action of the self-incompatibility mechanism. Growth of pollen tubes in styles at 2 weeks after pollination and ovule penetration by pollen tubes at 2 and 4 weeks after pollination were investigated by fluorescence microscopy. Some pollinated flowers were left to develop to seed maturity, then harvested to quantify the level of self-incompatibility of each tree. Trees ranged from 76 to 100% self-incompatible. There was no significant difference in the number of pollen tubes in the style between treatments although variation was present between trees. The number of pollen tubes present was similar to the number of ovules present within flowers. Penetration of ovules by pollen tubes over all five trees combined revealed no difference between treatments at 2 weeks after pollination; however, there was slightly greater penetration by cross-pollen tubes at 4 weeks after pollination. This difference was not large enough to account for the near complete lack of selfed-seed production, suggesting late pre- or post-zygotic arrest of selfed ovules.

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Monteiro, Nathália Frade, Helena Maria Reinaldo Lima, Francisco Laurdindo da Silva, Francisco das Chagas Araújo Sousa, Wenderson Costa da Silva, Liana Cynthia de Macedo Reis, Alice de Castro Cruz Pimentel, et al. "Atividade do óleo essencial de Eucalyptus Globulus no controle de bactérias da cavidade oral." Research, Society and Development 10, no. 14 (October 24, 2021): e60101420387. http://dx.doi.org/10.33448/rsd-v10i14.20091.

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O óleo de Eucalyptus globulus, apresenta diversas propriedades farmacológicas. Dentre elas, destacam-se seus efeitos antissépticos, expectorantes, antifúngicos e antimicrobiano. Diante disto o presente trabalho teve o objetivo geral de avaliar a atividade do óleo de Eucalyptus globulus no controle de bactérias da cavidade oral e objetivos específicos de comparar o efeito o óleo de Eucalyptus globulus com efeito da clorexidina e determinar em quais cepas bacterianas o óleo de Eucalyptus globulus apresentava maior eficácia. A atividade antimicrobiana foi testada in vitro, em bactérias do grupo Escherichia coli (E. coli), Enterococcus faecalis (E. faecalis) e Staphylococcus aureus (S. aureus) pelo método de difusão em ágar com a técnica de poços. Os poços foram preenchidos com as soluções de clorexidina 0,12% e óleo de Eucalyptus globulus em concentrações de 100%, 50%, 25%, 10%, 1% e 0,1% com a finalidade de comparar o efeito antimicrobiano pela inibição do crescimento. Os testes aconteceram em triplicata e a análise estatística foi realizada através do teste T de Student. Os dados foram organizados em tabelas para a demonstração dos resultados obtidos. Considerou-se como significante valores de p <0,05. Observou-se que o óleo de Eucalyptus globulus nas concentrações de 100%,50%,25% e 10% de maneira geral em todas as bactérias apresentaram efetividade semelhante ao da clorexidina. Pode-se concluir que o óleo de Eucalyptus globulus em suas variadas concentrações, apresentaram efeitos antimicrobianos, sua efetividade foi tão boa quanto o da clorexidina e em todas as cepas bacterianas estudadas este óleo apresentou ação antimicrobiana.

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Nair, T. S., S. Wilson, and C. Spurr. "Light sensitivity and germination of Eucalyptus globulus seeds." Seed Science and Technology 37, no. 2 (July 1, 2009): 329–36. http://dx.doi.org/10.15258/sst.2009.37.2.07.

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Vázquez, Gonzalo, Jorge Santos, M. Sonia Freire, Gervasio Antorrena, and Julia González-Álvarez. "Extraction of antioxidants from eucalyptus (Eucalyptus globulus) bark." Wood Science and Technology 46, no. 1-3 (April 8, 2011): 443–57. http://dx.doi.org/10.1007/s00226-011-0418-y.

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Jordan, GJ, BM Potts, JB Kirkpatrick, and C. Gardiner. "Variation in the Eucalyptus globulus Complex Revisited." Australian Journal of Botany 41, no. 6 (1993): 763. http://dx.doi.org/10.1071/bt9930763.

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Patterns of variation in the Eucalyptus globulus Labill. complex are reassessed by combining capsule measurements from an earlier study with recent collections, mainly of subspecies globulus. Four groups of populations are apparent and can be ascribed to the four subspecies maidenii, pseudoglobulus, bicostata and globulus. Intergrade populations between the latter three subspecies are widespread and mainly occur in the Otway Ranges and west Gippsland. There is a continuum in capsule morphology between the three-fruited subspecies, pseudoglobulus and bicostata. Subspecies globulus intergrades with these three-fruited intermediates. Three-fruited intergrade populations occuning north and south of the range of core pseudoglobulus can be differentiated and probably represent intergrades between pseudoglobulus and bicostata and between pseudoglobulus and globulus respectively. Reports of bicostata in the Furneaux Group and southern Victoria are thus probably erroneous and result from convergence in capsule morphology. The previously described taxon E. stjohnii (R. T. Bak.) R. T. Bak. is part of the continuum between subspecies pseudoglobulus and bicostata, but closer to pseudoglobulus. Populations phenotypically intermediate between and significantly different from globulus and the three-fruited intergrades are highly variable and occur in western Tasmania, on the northern end of Flinders Island, in the Otway Ranges and in west Gippsland. An isolated population on Rodondo Island is highly variable and has closest affinities to pseudoglobulus despite being within the geographical range of core globulus. The population from King Island is intermediate between the Otway phenotype and core globulus. The climatic regimes of the subspecies are markedly different and most three-fruited and globulus intergrade populations have closer climatic affinities to pseudoglobulus and globulus respectively. Hypotheses relating to the origin of the pattern of variation in E. globulus are discussed.

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Forrester, David I., Courtney A. Bertram, and Simon Murphy. "Impact of competition from coppicing stumps on the growth of retained trees differs in thinned Eucalyptus globulus and Eucalyptus tricarpa plantations in southeastern Australia." Canadian Journal of Forest Research 42, no. 5 (May 2012): 841–48. http://dx.doi.org/10.1139/x2012-040.

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Coppice growth on cut stumps in thinned Eucalyptus plantations has the potential to compete with and reduce the growth of retained sawlog crop trees (SCTs). This study examined to what extent SCT growth was reduced by coppice in two stands in southeastern Australia: (i) a Eucalyptus globulus Labill. plantation thinned at age 10 years and (ii) a slower growing Eucalyptus tricarpa L.A.S. Johnson & K. Hill (syn. Eucalyptus sideroxylon subsp. tricarpa L.A.S. Johnson) plantation thinned at age 62 years. After 5 years, thinning E. globulus from 850 to 400 trees·ha–1 increased the basal area of the largest diameter 200 SCTs·ha–1 (SCT200) by 11% when coppice was removed. There was no significant thinning response by SCT200 when coppice was retained. After 10 years, thinning E. tricarpa from about 600 to 100 trees·ha–1 increased the basal area of the largest diameter 100 SCTs trees·ha–1 (SCT100) by about 10% whether coppice was removed or not. At the time of measurement, coppice contributed 17% and 36% of stand sapwood area in thinned E. globulus and E. tricarpa treatments, respectively, and possibly competed with SCTs for water. This study shows the significant competitive effect that coppice can have in thinned eucalypt plantations and the importance of coppice management to the growth of retained trees.

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Lobstein, Annelise, Françoise Couic-Marinier, and Nathalie Koziol. "Huile essentielle d’ Eucalyptus globulus." Actualités Pharmaceutiques 57, no. 573 (February 2018): 59–61. http://dx.doi.org/10.1016/j.actpha.2017.11.033.

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Pohjonen, Veli, and Timo Pukkala. "Eucalyptus globulus in Ethiopian forestry." Forest Ecology and Management 36, no. 1 (August 1990): 19–31. http://dx.doi.org/10.1016/0378-1127(90)90061-f.

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Fito, Iryna, and Nataliya Stadnytska. "Standardization of Eucalyptus globulus leaves and Cetraria islandica slan." EUREKA: Health Sciences, no. 2 (February 16, 2021): 56–63. http://dx.doi.org/10.21303/2504-5679.2021.001659.

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The aim. The aim of this study was to propose methods of standardization of Eucalyptus globulus leaves and Cetraria islandica slan by the main group of biologically active substances (BAS). This was done for further development of complex medicines based on Eucalyptus globulus leaves and Cetraria islandica slan. These studies provide an opportunity for further development and standardization of extracts from these plants, and the main aim of this study is the development and standardization of a complex medicine. Materials and methods. Thin layer chromatography was used to determine the presence of these markers. Quantitative values of these biologically active substances were determined by spectrophotometric method according to the relevant methods of the State Pharmacopoeia of Ukraine. Results. Markers for the certification of Cetraria islandica and Eucalyptus globulus have been proposed in this study. Chlorophylls and 1,8-cineole were chosen as a marker for the study of Eucalyptus globulus, and polysaccharides were chosen as a marker for Cetraria islandica. The qualitative and quantitative content of these markers in the studied objects was studied. Further research in this direction will be aimed at developing methods for control and standardization of water and alcohol extracts from these plants. Conclusions. Biologically active substances in medicinal plant raw materials were studied. It is proposed to study extracts and finished products from Eucalyptus globulus leaves and Cetraria islandica slan using these methods. The method of qualitative and quantitative determination of polysaccharides in Cetraria islandica slan is easy to apply and easily reproducible. It is important to be able to standardize Eucalyptus globulus leaves for essential oils and chlorophylls. The biologically active substances-markers found in Eucalyptus globulus leaves and Cetraria islandica slan will be used for the development of herbal medicines, the standardization of which will be carried out for the same compounds.

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Ljaljevic-Grbic, Milica, Zeljko Savkovic, Milos Stupar, Nebojsa Ilic, and Jelena Vukojevic. "Phyllosphere mycobiota of Eucalyptus camaldulensis Dehnh. and E. globulus Labill." Zbornik Matice srpske za prirodne nauke, no. 129 (2015): 55–64. http://dx.doi.org/10.2298/zmspn1529055l.

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Diversity of phyllosphere microfungi of two Eucalypti species (E. camaldulensis and E. globulus) was investigated using moist chamber method. A total of 19 different taxa of phyllosphere microfungal community were identified in leaves and seed bearing capsules. Aspergillus niger was the most frequent isolate in both investigated Eucalyptus species along with Alternaria alternata and Penicillium spp. Saprotrophic species occurred more frequently in Eucalypti phyllosphere compared to plant pathogens. Epiphytes were quantitatively prevalent. Microscopic analyses of E. globulus phylloplane microfungal community revealed potential inhibitory effect of Trichoderma viride against Eucalypti pathogenic species Seimatosporium eucalypti which formed aberrant, collapsed conidia. The study of phyllosphere mycobiota is of significant importance, considering that numerous leaf inhabiting fungi are in complex interactions with each other and their host plant.

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Gurav, N. V., R. M. Gade, and R. J. Choudhari. "Efficacy Of Plant Solvents Extracts Against Xanthomonas Axonopodis Pv. Citri Causing Citrus Canker." Journal of Plant Disease Sciences 17, no. 1 (August 9, 2022): 44–49. http://dx.doi.org/10.48165/jpds.2022.1709.

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In vitro antibacterial properties of some solvents, such as petroleum ether, chloroform, ethyl acetate, dichloromethane, distilled water, and methanol extraction of two plants, Azadirachta indica and Eucalyptus globulus, were studied against Xanthomonas axonopodis pv. citri, the primary agent of citrus canker disease. Azadirachta indica whole plant extract had the highest extraction yield (9.08%) in distilled water and the lowest (2.9%) in petroleum ether, whereas Eucalyptus globulus extract had the highest extraction yield (9.01%) in methanol and the lowest (7.01%) in ethyl acetate solvent. By agar well diffusion and paper disc method, chloroform extract of Azadirachta indica and methanol extract of Eucalyptus globulus were found to have promising antibacterial action against Xanthomonas axanopodis pv. citri. The chloroform leaf extract of Azadirachta indica showed the maximum percentage of inhibition when compared to the methanol extract of Eucalyptus globulus.

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McKinnon, Gay E., Gregory J. Jordan, René E. Vaillancourt, Dorothy A. Steane, and Brad M. Potts. "Glacial refugia and reticulate evolution: the case of the Tasmanian eucalypts." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 359, no. 1442 (February 29, 2004): 275–84. http://dx.doi.org/10.1098/rstb.2003.1391.

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Tasmania is a natural laboratory for investigating the evolutionary processes of the Quaternary. It is a large island lying 40–44° S, which was repeatedly glaciated and linked to southeastern continental Australia during the Quaternary. Climate change promoted both the isolation of species in glacial refugia, and an exchange between Tasmanian and mainland floras. Eucalyptus is a complex and diverse genus, which has increased in abundance in Australia over the past 100 kyr, probably in response to higher fire frequency. Morphological evidence suggests that gene flow may have occurred between many eucalypt species after changes in their distribution during the Quaternary. This paper summarizes recent genetic evidence for migration and introgressive hybridization in Tasmanian Eucalyptus . Maternally inherited chloroplast DNA reveals a long–term persistence of eucalypts in southeastern Tasmanian refugia, coupled with introgressive hybridization involving many species. Detailed analysis of the widespread species Eucalyptus globulus suggests that migration from mainland Australia was followed by introgression involving a rare Tasmanian endemic. The data support the hypothesis that changes in distribution of interfertile species during the Quaternary have promoted reticulate evolution in Eucalyptus .

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Salvatore, Maria Michela, Carina Félix, Fernanda Lima, Vanessa Ferreira, Daniele Naviglio, Francesco Salvatore, Ana Sofia Duarte, Artur Alves, Anna Andolfi, and Ana Cristina Esteves. "Secondary Metabolites Produced by Macrophomina phaseolina Isolated from Eucalyptus globulus." Agriculture 10, no. 3 (March 11, 2020): 72. http://dx.doi.org/10.3390/agriculture10030072.

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In the course of investigations on the role of secondary metabolites in plant-microbe interactions, the production of secondary metabolites by Macrophomina phaseolina isolates from Eucalyptus globulus, was studied. This fungus is responsible for several plant diseases which affect crop productivity and industry. Although secondary metabolites may play a role in disease development, there are very few reports on M. phaseolina metabolomics and, as far as we know, isolates from eucalypts have not been investigated for secondary metabolites production. In the present paper, metabolites typical of fungi, from the family Botryosphaeriaceae, were identified for the first time as products of M. phaseolina. Furthermore, the isolate under examination was grown in the presence and absence of host stem tissue, and metabolite profiles were compared. Five products are reported for the first time in this species and azelaic acid was exclusively produced in the presence of eucalypt stem. Finally, phytotoxicity and cytotoxicity tests of culture filtrates and crude organic extracts were also performed. Key Contribution: Lipophilic metabolites produced by M. phaseolina might play a role in the plant-fungus interactions responsible for serious diseases of E. globulus.

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Aldoghaim, Fahad, Gavin Flematti, and Katherine Hammer. "Antimicrobial Activity of Several Cineole-Rich Western Australian Eucalyptus Essential Oils." Microorganisms 6, no. 4 (December 3, 2018): 122. http://dx.doi.org/10.3390/microorganisms6040122.

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Essential oils from the Western Australian (WA) Eucalyptus mallee species Eucalyptus loxophleba, Eucalyptus polybractea, and Eucalyptus kochii subsp. plenissima and subsp. borealis were hydrodistilled from the leaves and then analysed by gas chromatography–mass spectrometry in addition to a commercial Eucalyptus globulus oil and 1,8-cineole. The main component of all oils was 1,8-cineole at 97.32% for E. kochii subsp. borealis, 96.55% for E. kochii subsp. plenissima, 82.95% for E. polybractea, 78.78% for E. loxophleba 2, 77.02% for E. globulus, and 66.93% for E. loxophleba 1. The Eucalyptus oils exhibited variable antimicrobial activity determined by broth microdilution, with E. globulus and E. polybractea oils showing the highest activities. The majority of microorganisms were inhibited or killed at concentrations ranging from 0.25% to 8.0% (v/v). Enterococcus faecalis and Candida albicans were the least susceptible organisms, whilst Acinetobacter baumannii was the most sensitive. In conclusion, all oils from WA Eucalyptus species showed microorganism inhibitory activity, although this varied according to both the Eucalyptus species and the microorganism tested. These data demonstrate that WA Eucalyptus oils show activity against a range of medically important pathogens and therefore have potential as antimicrobial agents.

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Arnold, Roger, Juan Carlos Carmona, and Claudio Balocchi. "Programa de propagación clonal para Eucalyptus globulus en Chile." Bosque 12, no. 1 (1991): 3–9. http://dx.doi.org/10.4206/bosque.1991.v12n1-0.

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Pérez, S., C. J. Renedo, A. Ortiz, M. Mañana, D. Silió, and C. Tejedor. "Eucalyptus globulus and the eucalyptus nitens as energy crops." Renewable Energy and Power Quality Journal 1, no. 05 (March 2007): 431–36. http://dx.doi.org/10.24084/repqj05.308.

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Battaglia, M., C. Beadle, and S. Loughhead. "Photosynthetic temperature responses of Eucalyptus globulus and Eucalyptus nitens." Tree Physiology 16, no. 1-2 (January 1, 1996): 81–89. http://dx.doi.org/10.1093/treephys/16.1-2.81.

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Liu, Meng, and Linqing Yang. "Northward expansion of fire-adaptative vegetation in future warming." Environmental Research Letters 17, no. 2 (January 26, 2022): 024008. http://dx.doi.org/10.1088/1748-9326/ac417d.

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Abstract Fire frequency and intensity are increasing due to higher temperatures and more droughts. The distributions of fuels (vegetation in natural conditions) are also changing in response to climate change. The vegetation in cold environments such as high latitudes and high altitudes is found to move upward or northward due to global warming. However, few studies have investigated the distribution changes of fire adaptive species in warm environments. This study estimated and compared the distributions of a typical fuelwood, the Eucalyptus globulus, under different climate scenarios. The species distribution modeling techniques were adopted to estimate the current distributions of the Eucalyptus globulus and the future distributions under scenarios of both SSP245 and SSP585 in 2060. Results show that the probability of the existence of the Eucalyptus globulus in the Northern Hemisphere increases significantly (p < 0.001) under both SSP245 and SSP585, especially in North America and Europe. However, the probability in the Southern Hemisphere decreases. The distribution of the Eucalyptus globulus expands in the mid-latitude (40 N–60 N) of the Northern Hemisphere. High carbon emissions contribute to the boost of the establishment of the Eucalyptus globulus in the Northern Hemisphere. These findings demonstrate that the fire adaptive species shows the tendency of shifting northward in response to climate change, highlighting the challenge of northward expansion of fires in future warming.

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Ramalho, Maria Auxiliadora da Silva, Bernadete Santos, Daniel Fernandes Ramalho, Saraghina Maria Donato da Cunha, Raline Mendonça dos Anjos, Heloisa Mara Batista Fernandes de Oliveira, Aleson Pereira de Sousa, and Abrahão Alves de Oliveira Filho. "Atividade antiaderente dos óleos essenciais de Eucalyptus globulus e Eucalyptus citriodora contra cepas de Klebsiella pneumoniae." Research, Society and Development 9, no. 7 (May 20, 2020): e406974245. http://dx.doi.org/10.33448/rsd-v9i7.4245.

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O presente trabalho objetiva avaliar a Concentração Inibitória Mínima de Aderência (CIMA) dos óleos essenciais de Eucalyptus globulus e Eucalyptus citriodora contra a bactéria Klebsiella pneumoniae. Foi realizada a determinação da Concentração Inibitória Mínima de Aderência (CIMA) utilizando a técnica de tubos inclinados ao vidro, na presença de 5% de sacarose. Após 24 horas, foi realizada a leitura por meio da observação visual da aderência da bactéria às paredes do tubo. Observou-se que o óleo essencial de Eucalyptus globulus apresentou uma boa eficiência antiaderente frente à cepa de Klebsiella pneumoniae apresentando inibição do biofilme na concentração 1:8 semelhante ao controle digluconato de clorexidina 0,12%. O óleo de Eucalyptus citriodora não inibiu a formação do biofilme em nenhuma das concentrações testadas. Conclui-se que somente o óleo essencial pertencente à espécie Eucalyptus globulus apresentou ação antiaderente contra a cepa Klebsiella pneumoniae podendo este ser usado como método alternativo no combate de biofilmes produzidos por K. pneumoniae.

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Forrester, David I., Jürgen Bauhus, and Annette L. Cowie. "Nutrient cycling in a mixed-species plantation of Eucalyptus globulus and Acacia mearnsii." Canadian Journal of Forest Research 35, no. 12 (December 1, 2005): 2942–50. http://dx.doi.org/10.1139/x05-214.

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A doubling of aboveground biomass production has been observed in mixtures of Eucalyptus globulus Labill. and Acacia mearnsii de Wildeman when compared with monocultures after 11 years of growth. This study examined to what extent increased nitrogen (N) availability and accelerated rates of nutrient cycling may contribute to increased growth in mixtures. Monocultures of E. globulus (E) and A. mearnsii (A) and mixtures of these species were planted in a species replacement series: 100% E, 75% E + 25% A, 50% E + 50% A, 25% E + 75% A, and 100% A. Litterfall mass increased with aboveground biomass production and was highest in 50:50 mixtures and lowest in monocultures. Owing to higher N concentrations of A. mearnsii litter, N contents of annual litterfall were at least twice as high in stands containing A. mearnsii (32-49 kg·ha1·year1) as in E. globulus monocultures (14 kg·ha1·year1). Stands with A. mearnsii also cycled higher quantities of phosphorus (P) in annual litterfall than E. globulus monocultures. This study demonstrated that mixing A. mearnsii with E. globulus increased the quantity and rates of N and P cycled through aboveground litterfall when compared with E. globulus monocultures. Thus, mixed-species plantations appear to be a useful silvicultural system to improve nutrition of eucalypts without fertilization.

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Jones, Rebecca C., René E. Vaillancourt, Peter L. Gore, and Brad M. Potts. "Genetic control of flowering time in Eucalyptus globulus ssp. globulus." Tree Genetics & Genomes 7, no. 6 (July 20, 2011): 1209–18. http://dx.doi.org/10.1007/s11295-011-0407-1.

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Iglesias-Abad, Sergio, Manuel Alvarez-Vera, and Carlos Salas. "Biochar of residual biomass from eucalyptus (Eucalyptus globulus) by two pyrolysis methods." Manglar 17, no. 2 (June 30, 2020): 105–11. http://dx.doi.org/10.17268/manglar.2020.016.

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Costa, Joana, René E. Vaillancourt, Dorothy A. Steane, Rebecca C. Jones, and Cristina Marques. "Microsatellite analysis of population structure in Eucalyptus globulus." Genome 60, no. 9 (September 2017): 770–77. http://dx.doi.org/10.1139/gen-2016-0218.

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Eucalyptus globulus subsp. globulus Labill. (Tasmanian Blue Gum), native to southeast Australia, is a benchmark species for the pulp and paper industry. We genotyped 397 trees from 16 populations of E. globulus representing the native diversity in Australia using 24 microsatellite loci. Eight genetically distinct groups were detected, consistent with genetic groupings detected in previous quantitative and molecular studies. A sample of 29 Portuguese individuals was added to help clarify the origin of the Portuguese landrace. The results suggest a southern and eastern Tasmania origin for the Portuguese landrace. This genetic framework will enable researchers to investigate the provenance of individuals of unknown pedigree and assess the levels of representation of E. globulus natural variation in the Portuguese landrace.

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Potter, K. J. B., and A. E. A. Stephens. "Suitability of valued eucalypt species for the larval development of the gum leaf skeletoniser Uraba lugens." New Zealand Plant Protection 58 (August 1, 2005): 184–90. http://dx.doi.org/10.30843/nzpp.2005.58.4270.

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Gum leaf skeletoniser Uraba lugens is native to Australia and is a common defoliator of Eucalyptus Uraba lugens was first recorded in New Zealand in 1992 and is now well established in the Auckland region As U lugens has the potential to damage Eucalyptus in New Zealand nochoice larval development trials were used to assess the ability of U lugens larvae to develop on 18 Eucalyptus species that are highly valued in New Zealand Eucalyptus nitens and E nicholii were the most suitable larval hosts as larval mortality was low and development time was brief Larvae reared on E fastigata had a rapid development time and high growth rates resulting in heavy female pupae although larval mortality was in the intermediate range Species that were least suitable for U lugens development included Corymbia maculata E microcorys the juvenile foliage of E globulus globulus and E globulus maidenii

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Shah, Gagan, Maninderjit Kaur, Prabh Simran Singh, Sandeep Rahar, Falgun Dhabliya, Yuvraj Arya, and Richa Shri. "Pharmacognostic Parameters of Eucalyptus globulus Leaves." Pharmacognosy Journal 4, no. 34 (December 2012): 38–43. http://dx.doi.org/10.5530/pj.2012.34.7.

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Ibrahim, M., S. Ambreen, A. Hussain, N. Hussain, M. Imran, B. Ali, S. H. Sumrra, M. Yousuf, and F. S. Rehmani. "Phytochemical Investigation on Eucalyptus globulus Labill." Asian Journal of Chemistry 26, no. 4 (2014): 1011–14. http://dx.doi.org/10.14233/ajchem.2014.15765.

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Yeoh, Suat Hui, Simon Y. W. Ho, Andrew H. Thornhill, and William J. Foley. "Regional population expansion in Eucalyptus globulus." Molecular Phylogenetics and Evolution 68, no. 3 (September 2013): 498–501. http://dx.doi.org/10.1016/j.ympev.2013.04.020.

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Saur, E., E. K. S. Nambiar, and D. N. Fife. "Foliar nutrient retranslocation in Eucalyptus globulus." Tree Physiology 20, no. 16 (October 1, 2000): 1105–12. http://dx.doi.org/10.1093/treephys/20.16.1105.

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Freeman, J. S., H. D. Jackson, D. A. Steane, G. E. McKinnon, G. W. Dutkowski, B. M. Potts, and R. E. Vaillancourt. "Chloroplast DNA phylogeography of Eucalyptus globulus." Australian Journal of Botany 49, no. 5 (2001): 585. http://dx.doi.org/10.1071/bt00094.

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The pattern of variability in chloroplast DNA (cpDNA) of Eucalyptus globulus Labill. (Myrtaceae) was studied using 270 samples from southern Australia. Forty variable sequence characters were found, defining 105 haplotypes. Haplotypes were assigned to three major cpDNA clades based on their phylogeny. The pattern of cpDNA variation did not conform to subspecies boundaries; however, there was a strong geographic structure to the distribution of clades and haplotypes. One clade (JC) was geographically central and widespread and was found in 163 samples from Tasmania and continental Australia. Less-common clades occurred in more localised regions—southern (Js, 77 samples) and eastern (Jet, 12 samples). The distribution of the J et and Js clades coincides with hypothesised glacial refugia in Tasmania, suggesting limited seed-mediated dispersal since deglaciation.

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Ibarra, Luis, Gary Hodge, and Juan José Acosta. "Quantitative Genetics of a Hybrid Population of Eucalyptus nitens × Eucalyptus globulus: Estimation of Genetic Parameters and Implications for Breeding Strategies." Forests 14, no. 2 (February 13, 2023): 381. http://dx.doi.org/10.3390/f14020381.

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In Chile, interspecific hybrids between Eucalyptus nitens × Eucalyptus globulus (GloNi) were developed by Arauco Forestry to capture specific traits from each parental species: growth rate and cold resistance from E. nitens (NIT) and wood properties from E. globulus (GLO). Field tests of E. nitens × E. globulus were distributed in two geographic zones: Arauco (12 tests) and Valdivia (15 tests), where growth and wood properties measurements were recorded at different ages. The hybrid population is composed of clones from 28 full-sib families, being the result of crossing 12 E. nitens females and 8 E. globulus males. Progeny from each of these families were vegetatively propagated and tested on each growth zone, with a total of 1214 clones developed. The quantitative genetic parameter estimates reveal high genetic variation in hybrid volume gain and wood properties, which make possible large genetic gain in all traits analyzed. Additionally, E. nitens has a considerable impact on the volume gain of the hybrid, making it important to test more parents in future interspecific crosses in both hybrid zones. In contrast, E. globulus demonstrated zero impact in volume. In wood traits, E. globulus in Arauco zone demonstrates a large effect on the genetic variability of these traits; meanwhile, in the Valdivia zone, E. nitens and E. globulus parents contributed roughly similar amounts of genetic variation. The high General Hybridizing Ability (GHA) and General Combining Ability (GCA) relationship between hybrid progeny and pure species progeny performance indicates that parents could be selected for interspecific crosses based on pure species test results for volume and wood properties.

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Landeo-Villanueva, Guillermo Ernesto, María Elena Salazar-Salvatierra, Julio Reynaldo Ruiz-Quiroz, Noemi Zuta-Arriola, Benjamín Jarama-Soto, Oscar Herrera-Calderon, Josefa Bertha Pari-Olarte, and Eddie Loyola-Gonzales. "Inhibitory Activity of Essential Oils of Mentha spicata and Eucalyptus globulus on Biofilms of Streptococcus mutans in an In Vitro Model." Antibiotics 12, no. 2 (February 10, 2023): 369. http://dx.doi.org/10.3390/antibiotics12020369.

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The aim of this study was to evaluate the inhibitory activity of the commercially available essential oils of Mentha spicata (spearmint) and Eucalyptus globulus (eucalyptus) on Streptococcus mutans ATCC 25175 biofilms in vitro, emulating dental plaque conditions. The composition of the essential oils (EOs) was determined using gas chromatography coupled with mass spectrometry (GC-MS), with the main metabolites being Carvone (57.93%) and Limonene (12.91%) for Mentha spicata and 1,8-Cineole (Eucalyptol) (65.83%) for Eucalyptus globulus. The inhibitory activity was evaluated using the methods of agar-well diffusion and colorimetric microdilution. The inhibition halos were 18.3 ± 0.47 mm and 27.0 ± 0.82 mm, and the MICs were 1.8484 mg/mL and 1.9168 mg/mL for the EOs of Mentha spicata and Eucalyptus globulus, respectively. The activity against the biofilms was evaluated on a substrate of bovine enamel pieces using a basal mucin medium (BMM) in anaerobic conditions with daily sucrose exposition cycles in order to emulate oral cavity conditions. The EOs were applied in a concentration of 0.5% in a sterile saline vehicle with 1% polysorbate 20. After 72 h of cultivation, a significant reduction was observed (p < 0.001%) on the biofilm biomass, which was evaluated by its turbidity in suspension and using a count of the recoverable organisms with regards to the control. The effects of the Eos were not significantly distinct from each other. The EOs showed antimicrobial activity against both the Streptococcus mutans planktonic and biofilm cultures. Thus, EOs may have great potential for the development of pharmaceutical and sanitary products for oral health.

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Bueno, Paula Carolina Pires, Milton Groppo Junior, and Jairo Kenupp Bastos. "A GC-FID Validated Method for the Quality Control of Eucalyptus globulus Raw Material and its Pharmaceutical Products, and GC-MS Fingerprinting of 12 Eucalyptus Species." Natural Product Communications 9, no. 12 (December 2014): 1934578X1400901. http://dx.doi.org/10.1177/1934578x1400901233.

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In this work we have validated a method to standardize and control the quality of Eucalyptus globulus raw material and phytomedicines containing either the essential oil or the fluid extract of this plant in the final formulation. Internal standardization provided a simple, fast, and reproducible GC-FID analytical method that accurately quantified 1,8-cineol in different E. globulus sub-products, such as its essential oil, dried leaves, fluid extract, and syrup. In addition, GC-MS identification of the main compounds of E. globulus species afforded fingerprints for the qualitative analysis of different Eucalyptus species.

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Hamilton, Matthew G., Mauricio Acuna, John C. Wiedemann, Rick Mitchell, David J. Pilbeam, Mark W. Brown, and Brad M. Potts. "Genetic control of Eucalyptus globulus harvest traits." Canadian Journal of Forest Research 45, no. 6 (June 2015): 615–24. http://dx.doi.org/10.1139/cjfr-2014-0428.

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The cost of harvesting short-rotation plantation eucalypts can be in excess of AU$2500·ha−1. Despite this high cost, the extent to which harvesting productivity is affected by tree genetics is not well understood. We address this issue in a study of two 10-year-old genetic field trials of Eucalyptus globulus Labill. in Australia. Standing-tree traits analysed were survival, diameter at breast height, basal area, and stem straightness and forking. Harvest traits analysed were volume, time, and productivity. Genetic group and within-group genetic variation (additive and dominance), stand-level family variation, phenotypic and genetic correlations, and the effects of inbreeding were estimated for these traits. The different scenarios studied showed that plantation harvest productivity was affected by tree genetics to some degree but was mainly affected through positive covariation with stem diameter. Harvest productivity is thus unlikely to have been adversely affected by past selection. Although no significant additive or dominance genetic variation in stem forking or straightness was detected, weak phenotypic correlations were consistent with harvest productivity being higher in straighter trees with no forking. High inbreeding depression was evident for growth and survival; however, in open-pollinated progeny, this resulted in only a slight reduction in harvest productivity (5.5%) compared with out-crossed progeny.

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Santelices M., Rómulo, Sergio Espinoza, and Antonio Cabrera. "Potencial del secano interior de la región del maule para la producción de biomasa." Ciencia & Investigación Forestal 20, no. 3 (July 13, 2014): 43–52. http://dx.doi.org/10.52904/0718-4646.2014.425.

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Se presenta un estudio de potencialidad del secano interior de la región del Maule en Chile para la obtención de biomasa en turnos de corta rotación con las especies Eucalyptus. globulus ssp. maidenii, Eucalyptus camaldulensis, Eucalyptus tereticornis y Eucalyptus cladocalyx manejadas bajo silvicultura intensiva

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Canhoto, C., F. Bärlocher, and M. A. S. Graça. "The effects of Eucalyptus globulus oils on fungal enzymatic activity." Fundamental and Applied Limnology 154, no. 1 (May 13, 2002): 121–32. http://dx.doi.org/10.1127/archiv-hydrobiol/154/2002/121.

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Jones, Rebecca C., Dorothy A. Steane, Bradley M. Potts, and René E. Vaillancourt. "Microsatellite and morphological analysis of Eucalyptus globulus populations." Canadian Journal of Forest Research 32, no. 1 (January 1, 2002): 59–66. http://dx.doi.org/10.1139/x01-172.

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Eucalyptus globulus Labill. is native to southeastern Australia and is the most important temperate hardwood plantation species in the world. It consists of four subspecies that are morphologically and geographically distinct but that are linked by morphologically and geographically intermediate populations. The Jeeralang provenance, an intermediate population from southeastern Victoria, is an important source of seed for plantations and genetic material for breeding programs because of its superior growth and wood density. To determine the genetic affinities of this provenance, 154 trees from three subspecies and the Jeeralang provenance were sampled. Analysis of 12 morphological characters verified that the Jeeralang provenance is intermediate between subspecies bicostata (Maiden, Blakely, & J. Simm.) Kirkpatr., globulus and pseudoglobulus (Naudin ex Maiden) Kirkpatr., with individuals having closest affinities to either ssp. globulus or ssp. bicostata. However, eight microsatellite loci showed that the Jeeralang provenance has greater affinities to Victorian ssp. globulus to which it is geographically closest. In contrast, Tasmanian and Victorian ssp. globulus are morphologically similar yet appear to be distinct at the molecular level. This study emphasizes the importance of using traits that are unlikely to be influenced by selection when determining the origin and affinities of populations.

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Meddings, R. L. A., J. A. McComb, and D. T. Bell. "The salt-waterlogging tolerance of Eucalyptus camaldulensis x E. globulus hybrids." Australian Journal of Experimental Agriculture 41, no. 6 (2001): 787. http://dx.doi.org/10.1071/ea00104.

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The salt–waterlogging tolerance of Eucalyptus camaldulensis × E. globulus hybrids was compared with parental clones of E. camaldulensis, open-pollinated seedlings of E. globulus and Eucalyptus camaldulensis × E. camaldulensis seedlings in a glasshouse trial. Seven-month-old plants were waterlogged for 10 weeks with a saline solution of increasing concentration to 350 mmol NaCl/L. Eucalyptus camaldulensis had higher tolerance to salt–waterlogging than E. globulus as assessed by survival and height growth rate. The performance of the hybrid families was intermediate between the 2 parental species as was the performance of progeny from crosses between salt tolerant E. camaldulensis parents. Within families some hybrid individuals performed as well as the E. camaldulensis parents. The most tolerant plants have been micropropagated for further experiments and field trials on saline agricultural land.

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McManus, L. J., J. Sasse, C. K. Blomstedt, and G. Bossinger. "Pollen treatment for mutation induction in Eucalyptus globulus ssp. globulus (Myrtaceae)." Australian Journal of Botany 54, no. 1 (2006): 65. http://dx.doi.org/10.1071/bt05094.

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Mutation induction has played an integral role in the improvement of most commercially important crop species but has not been successfully applied to tree species because of their long reproductive cycles which hinder the use of the traditional seed-treatment approaches. Treatment of pollen with a chemical mutagen prior to pollination will, theoretically, allow stable, heterozygous mutant trees to be produced in a relatively short time and might facilitate mutagenesis of tree species. As the first step in testing this hypothesis, a controlled-pollination trial with chemically treated pollen was conducted in Eucalyptus globulus ssp. globulus (Labill.). Assessment of fruit, seed and seedlings from more than 500 pollinations associated mutagenic treatment of pollen with a significant reduction in seed set. Non-significant increases in capsule (fruit) abortion, the inhibition of seed germination and the incidence of aberration in seedlings were also noted. We argue that pollen treatment may be a useful means of producing Eucalyptus mutants with variation in flowering time, salinity and frost tolerance, lignification and other traits of scientific and economic importance.

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Torres-Dini, D., A. C. P. Nunes, A. Aguiar, N. Nikichuk, C. Centurión, M. Cabrera, M. L. T. Moraes, M. D. V. Resende, and A. M. Sebbenn. "Clonal selection of Eucalyptus grandis x Eucalyptus globulus for productivity, adaptability, and stability, using SNP markers." Silvae Genetica 65, no. 2 (December 1, 2016): 30–38. http://dx.doi.org/10.1515/sg-2016-0014.

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Abstract In Uruguay, reforestations with Eucalyptus sp. is of fundamental importance to supply paper, pulp, and wood production. This study investigates genetic, productivity, stability, and adaptability parameters in the selection of Eucalypts grandis x Eucalyptus globulus full-sib hybrid clones. The study was conducted in a clonal test, repeated in two different soils types, in Rio Negro State, Uruguay. The population was characterized phenotypically for diameter at breast height (dbh) and genotyped for SNP markers (EuCHIP60K chip). Mean dbh was similar between sites and the genotype–environment interaction was simple. We found high genotype correlation in clone performance between environments (0.708), indicating the possibility of selecting the same clones for both study locations. Mean heritability between clones (0.724), coefficient of individual genetic variation (10.9 %), and relative variation (0.916), suggest the possibility of gains (estimated at 3.1 % for both sites together) by selecting clones with higher growth rates. A total of 15,196 SNPs were used to confirm parentage and test a genomic selection model for dbh. The predictive capacity was negative (-0.15) given the small population size (78 individuals). The most adaptable material among the tested study sites presented higher values for SNP heterozygosity. Thus, using molecular markers to identify clones responsive to environmental changes can act as a powerful tool in Eucalyptus breeding programs. The hybrid population showed greater adaptability than E. globulus for this region.

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Carrillo, Isabel, Sofía Valenzuela, and Juan Pedro Elissetche. "Comparative evaluation of Eucalyptus globulus and E. nitens wood and fibre quality." IAWA Journal 38, no. 1 (February 13, 2017): 105–16. http://dx.doi.org/10.1163/22941932-20170160.

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An evaluation of 100 Eucalyptus globulus and 100 E. nitens trees (six years old) was made using the Pilodyn micro-drilling tool as an indicator of wood density. Thirty E. globulus and thirty E. nitens trees with high, medium and low density were selected and sampled with an increment borer at breast height for anatomical analysis using fibre tester equipment and the Resistograph device to generate detailed information about fibre biometry and anatomical wood properties of both species for hybrid development. Eucalyptus globulus trees had a basic wood density average of 478 kg/m3, while E. nitens had a density of 490 kg/m3. Both micro-drilling tools showed significant correlation coefficients with basic wood density. Correlation coefficients between basic wood density and Pilodyn values were negative, being -0.53 (p = 0.01) and -0.68 (p < 0.001) for E. globulus and E. nitens, respectively. For both species a positive correlation was observed between basic density and Resistograph mean amplitude; the correlation coefficient was 0.84 (p < 0.001) for E. globulus, and 0.85 (p < 0.001) for E. nitens. Eucalyptus nitens trees had a higher density and amplitude average and smaller Pilodyn values than E. globulus trees, while the latter had higher coarseness, fibre length and diameter at breast height than E. nitens trees. However, E. nitens showed larger differences between features of earlywood and latewood in a growth ring than E. globulus trees.

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Guerra, Anderson, Lucian A. Lucia, and Dimitris S. Argyropoulos. "Isolation and characterization of lignins from Eucalyptus grandis Hill ex Maiden and Eucalyptus globulus Labill. by enzymatic mild acidolysis (EMAL)." Holzforschung 62, no. 1 (January 1, 2008): 24–30. http://dx.doi.org/10.1515/hf.2008.004.

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Abstract Despite the growing importance of Eucalyptus wood as raw material for pulp and paper, there is a lack of knowledge on the chemistry of their macromolecular components. The present paper addresses this issue by applying the recently developed protocol for isolating enzymatic mild acidolysis lignins (EMAL) from Eucalyptus grandis, Eucalyptus globulus and the softwood species Douglas fir and white fir, which were used for comparative purposes. The structures of EMALs were investigated by quantitative 31P NMR, DFRC/31P NMR (derivatization followed by reductive cleavage followed by quantitative 31P NMR) and size exclusion chromatography (SEC). Overall, the yields of EMALs isolated from Eucalyptus were higher than those from the softwoods examined. Lignin from E. globulus was found to contain higher contents of arylglycerol-β-aryl ether structures, free phenolic hydroxyl groups and syringyl-type units than lignin from E. grandis. New insights provided by the DFRC/31P NMR revealed that up to 62.2% of arylglycerol-β-aryl ether structures in E. globulus are uncondensed, while in E. grandis the amount of such uncondensed structures was found to be lower than 48%. SEC analyses showed that lignins from E. grandis and softwoods associate in greater extension than lignin from E. globulus.

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Journal articles on the topic 'Eucalyptus globulus'

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