Journal articles: 'Eucalyptus camaldulensis'

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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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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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Fladung, M., H. Schroeder, C. Wehenkel, and B. Kersten. "Differentiation of six Eucalyptus trees grown in Mexico by ITS and six chloroplast barcoding markers." Silvae Genetica 64, no. 1-6 (December 1, 2015): 121–30. http://dx.doi.org/10.1515/sg-2015-0012.

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Abstract Different species of the genus Eucalyptus, originally native to Australia, are being cultivated in different parts of the world due to their fast growth and beneficial wood properties. In Mexico, probably up to 25 different Eucalyptus species (many of them with unknown species declaration) were introduced early in the 20th century. Many Eucalyptus species are cross compatible and information about provenances of the single eucalypt species is rare. In this study, an experimental plantation established in 1984 and located in Northeast of Mexico was chosen as example to re-assign the species name of six randomly selected Eucalyptus trees growing in this plantation. First, a phylogenetic tree was constructed from complete chloroplast sequences of 31 Eucalyptus species available in the NCBI database. The phylogenetic tree includes three of the nine Eucalyptus species known to be introduced to Mexico, namely E. camaldulensis, E. saligna and E. grandis, which belong to a clade named “Symphyomyrts”. By employing combined BLASTN and UPGMA analyses of six chloroplast (cp) regions, three of the six unknown eucalypt samples (Euc4, 5, 6) cluster together with E. microtheca and E. cladocalyx, whereas the other three (Euc1, 2, 3) were more similar to a group containing E. camaldulensis, E. grandis and E. saligna. UPGMA analysis of the ITS region overall shows the same rough clustering, but provide more detailed information for two samples being most likely assigned to E. camaldulensis.

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Mitiku, Begashaw, Bekele Lemma, and Fantaw Yimer. "Eucalyptus camaldulensis Woodlot Influences Soil Properties and Teff Yield on the Adjacent Croplands in Guraghe Zone, Central Ethiopia." EAS Journal of Biotechnology and Genetics 4, no. 1 (February 10, 2022): 1–10. http://dx.doi.org/10.36349/easjbg.2022.v04i01.

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In Ethiopia five Eucalyptus species were adopt wide area and Eucalyptus camaldulensisi more dominant in low land and middle land area and economically very important. This leads to farmers converted portion of their farmland to Eucalyptus camaldulensis woodlots. The aim of this study was to assess the impact of E. camaldulensis woodlot on the soil properties and teff (Erogrsticteff) yields on an adjacent cropland. A plot of 2m x 1.5m area was laid down inside plantation (assumed zero m), at one, three, six, nine and20 m distances away from the E. camaldulensis woodlot in to the adjacent cropland. This was replicated on three farmlands. Teff was grown on the plots and the yield, height, and biomass of teff were measured and thirty six soil samples were collected from experimental field. The soil bulk density (p<0.01), soil moisture (p<0.001), SOC (p < 0.05), avail P (p < 0.01) and avail K (p < 0.01) were significantly varied with distance. The yield and height of teff were significantly (p< 0.01) affected by distance from the woodlot. Moreover, mean soil total N at three meter, avail P from one meter to six meter, avail K after nine meter, yield and biomass of teff up to six meter were reduced. The yield reduction of teff could be attributed to the soil moisture and soil nutrient competition between the Eucalyptus woodlot and teff. In this study we had concluded that E. Camaldulensis wood lot has effect on teff production up to six- meter distance from the woodlot and adjacent crop were recommended after Six meter.

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Oliveira, Nádia Cristina de, Murilo Fonseca Ribeiro, Angelo Ottati, Wagner de Souza Tavares, José Eduardo Serrão, José Cola Zanuncio, Ronald Zanetti, and Carlos Frederico Wilcken. "The survival, development, and reproduction of Gonipterus platensis (Coleoptera: Curculionidae) on the main Eucalyptus (Myrtaceae) genotypes planted in Brazil." PeerJ 10 (August 1, 2022): e13698. http://dx.doi.org/10.7717/peerj.13698.

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Background Gonipterus platensis Marelli (Coleoptera: Curculionidae) is the main defoliating beetle of Eucalyptus L’Hér. (Myrtaceae) plants worldwide. The suitability of Eucalyptus to this pest varies among host plant genotypes. The objective of this study was to evaluate the development, reproduction, and survival of G. platensis on Eucalyptus species and hybrids to assess their suitability to this insect pest in Brazil. Methods The survival, development, and reproduction parameters were evaluated with G. platensis feeding leaves of Eucalyptus camaldulensis Dehnh., Eucalyptus grandis W. Hill., Eucalyptus urophylla S.T. Blake and on the hybrids of E. grandis ×E. urophylla ‘H13’ and ‘VR3748’ in the laboratory. Results The duration of the larval stage of G. platensis was shorter on E. urophylla. The pupal stage and the period from larva to adult were equally shorter on E. urophylla and E. camaldulensis. The viability of instars of this insect was low on both E. grandis and E. camaldulensis. The complete lifespan, oviposition period and reproduction parameters of G. platensis were greater on E. urophylla, lower on E. camaldulensis and E. grandis, and intermediate on both hybrids tested. Synthesis Eucalyptus urophylla is the most suitable host for G. platensis survival, development, and reproduction, while E. grandis and E. camaldulensis are the least suitable.

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Pérez Guardia, Segundo H. "Proceso Semiquímico de Obtención de Pulpa de Eucalyptus camaldulensis; Dehn, Eucalyptus glóbulos: Labill y Eucalyptus viminalis; Labill, para Papel." Revista Científica Pakamuros 5, no. 1 (December 21, 2017): 9. http://dx.doi.org/10.37787/pakamuros-unj.v5i1.51.

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El presente trabajo se realizó en la Universidad Nacional Agraria La Molina. Laboratorio de Pulpa y Papel, con muestras de Eucalyptus camaldulensis; Dehn, Eucalyptus glóbulus; Labill y Eucalyptus viminalis; Labill, procedentes del Valle del Mantaro, el objetivo fue determinar las características papeleras, utilizando el método semi-químico al sulfato. Las muestras se sometieron a una misma sulfidez de 11%, al cabo de la digestión el desfibrado se realizó en las mismas condiciones de rabajo y metodología. El mayor rendimiento para Eucalyptus viminalis Labill (70.92%) y el menor para Eucalyptus camaldulensis; Dehn (65.46%), siendo la variación entre especies de 0.79 %, y una diferencia significativa entre especies. Las pulpas obtenidas se sometieron a 45 °SR grados “shopper Riegler” de refinado, éste tratamiento a las fibras de pulpa, motivo incremento en longitud de rotura, índice de rasgado y doble plegado de Eucalyptus glóbulus, mayor deslignificación y blancura en pulpa, ocasionando menor gasto de reactivos para blanquear. Eucalyptus viminalis; Labill, Eucalyptus camaldulensis; Dehn en rendimiento en pulpa y composición química se encuentran dentro de los rangos apropiados para obtener pulpa semi-química al sulfato y papel para diferentes usos.

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Manh, Ho Dung, Do Thi Hue, Nguyen Thi Thanh Hieu, Doan Thi Thanh Tuyen, and Ong Thi Tuyet. "The Mosquito Larvicidal Activity of Essential Oils from Cymbopogon and Eucalyptus Species in Vietnam." Insects 11, no. 2 (February 17, 2020): 128. http://dx.doi.org/10.3390/insects11020128.

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The larvicidal activity of essential oils (EOs) extracted from Cymbopogon citratus, Cymbopogon winterianus, Eucalyptus citriodora, and Eucalyptus camaldulensis aromatic plants grown in Vietnam was evaluated on Aedes aegypti larvae. The EOs were hydro-distilled in a Clevenger-type apparatus. The EOs were analyzed by gas chromatography–mass spectrometry (GC–MS). The mortality rates obtained from the bioassays were used to calculate the lethal concentrations (LC50) of the EOs by the probit analysis method. These essential oils exhibited toxicity to the larvae of Aedes aegypti. Results were obtained for Cymbopogon citratus (LC50 = 120.6 ppm), Cymbopogon winterianus (LC50 = 38.8 ppm), Eucalyptus citriodora (LC50 = 104.4 ppm), and Eucalyptus camaldulensis (LC50 = 33.7 ppm). The essential oils of Eucalyptus camaldulensis and Cymbopogon winterianus were found to be the most efficient, and their respective values of LC50 were 33.7 ppm, 38.8 ppm. In conclusion, this research adds to the growing body of literature on natural larvicides from essential oils against Aedes aegypti mosquitoes.

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Lopes, Emerson Delano, Cláudio Lúcio Fernandes Amaral, and Adalberto Brito Novaes. "DESEMPENHO NO CAMPO DE MUDAS DE Eucalyptus urophylla, Eucalyptus camaldulensis E Corymbia citriodora PRODUZIDAS EM DIFERENTES RECIPIENTES." FLORESTA 44, no. 4 (December 31, 2014): 589. http://dx.doi.org/10.5380/rf.v44i4.26480.

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Avaliou-se a produção de mudas de Eucalyptus urophylla, E. camaldulensis e Corymbia citriodora em blocos prensados e em dois modelos de tubetes por meio da avaliação da sobrevivência e do crescimento inicial das mudas. A sobrevivência foi avaliada aos sessenta dias e o crescimento inicial em altura e diâmetro ao nível do solo ao décimo mês pós-plantio. Foi utilizado o delineamento em blocos casualizados com cinco repetições. Mudas de E. urophylla e E. camaldulensis produzidas nos blocos e nos dois modelos de tubetes e mudas de C. citriodora produzidas nos dois modelos de tubetes obtiveram altas taxas de sobrevivência. Já as mudas de C. citriodora produzidas nos blocos apresentaram a menor média de sobrevivência no estudo. As médias de crescimento inicial das mudas de E. urophylla produzidas nos blocos e tubetes de 50 cm3 foram superiores às encontradas para mudas produzidas em tubetes de 35 cm3. Para E. camaldulensis e C. citriodora, as médias de crescimento inicial foram semelhantes nos três recipientes. Recomenda-se a produção de mudas de E. urophylla em tubetes de 50 cm3 ou em blocos prensados. As mudas de E. camaldulensis podem ser produzidas nos três recipientes, e C. citriodora nos tubetes de 50 e 35 cm3.Palavras-chave: Qualidade de mudas; desempenho pós-plantio. AbstractPerformance in the field of Eucalyptus urophylla, Eucalyptus camaldulensis and Corymbia citriodora produced in different containers. We evaluated the production of Eucalyptus urophylla, E. camaldulensis and Corymbia citriodora in pressed blocks and two tubes models by the evaluation of survival and early growth of seedlings. We assessed survival at sixty days and initial growth in height and diameter at ground level to the tenth month after planting. We used a randomized block design with five replications. Seedlings of E. urophylla and E. camaldulensis produced in blocks, and in two tube models, and seedlings of C. citriodora produced in two tube models had high survival rates. On the other hand, seedlings of C. citriodora produced in blocks presented the lowest survival mean. The initial seedling growth mean of E. urophylla produced in blocks and tubes of 50 cm3 were higher than for seedlings grown in tubes of 35 cm3. In relation to E. camaldulensis and C. citriodora the average initial growth were similar in the three containers. Production of seedlings of E. urophylla is recommended in tubes of 50 cm3 or in compressed blocks, E. camaldulensis seedlings can be produced in three containers, and C. citriodora in tubes of 50 and 35 cm3.Keywords: Seedling quality; post-planting performance.

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O.O., Adetola, Bakpolor V.R., Yusuf A.S., Onafurume O.M., Oyedeji O.T., Murtala M.O., Ayanniyi O.A., and Adekoya O.O. "Insecticidal Ability of Essential Oil Content of Eucalyptus camaldulensis from Onigambari Forest Reserve, South West, Nigeria." International Journal of Research and Innovation in Social Science VII, no. V (2023): 877–80. http://dx.doi.org/10.47772/ijriss.2023.70569.

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Biodegradable and ecologically natural products such as essential oils are emerging candidates for the replacement of usually applied chemical pesticides. This work reported the chemical composition and effects caused by leaves essential oils (EOs) from Eucalyptus camaldulensis. Leaves of Eucalyptus camaldulensis gave 1.36 % w/w oil dried weight basis. GC-MS analysis of the oils resulted in the identification of 15 constituents, representing 96.24% of the oil. 1,8-cineole (CIN) (65.26%), γ-terpinene (18.45%), o-cymene (13.55%) and terpinen-4-ol (7.01%) were the major components of E. camaldulensis. From the results; E. camaldulensis leaf oils have great potential and can be utilized as cheap sources for the commercial isolation of 1,8-cineole.

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Old, KM, and T. Kobayashi. "Eucalypts Are Susceptible to the Chestnut Blight Fungus, Cryphonectria Parasitica." Australian Journal of Botany 36, no. 5 (1988): 599. http://dx.doi.org/10.1071/bt9880599.

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Eucalyptus camaldulensis, E. haemastoma, E, microcorys, E. punctata and E. robusta grown in greenhouses in Japan were susceptible to infection by Cryphonectria parasitica, syn. Endothia parasitica. A Cryphonectria sp. found on Eucalyptus in central Honshu was morphologically identical to C. parasitica and caused cankers on the five eucalypts and Castanea crenata. Endothiella, the anamorph of Cryphonectria. spp, and Endothia spp., was found on eucalypts in four field locations in Honshu. The evidence suggests that eucalypts are infected in the field by C. parasitica in Japan. Accidental introduction of the chestnut blight fungus into Australia could have serious consequences for the health of native eucalypts, in addition to causing disease of cultivated chestnuts.

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Gutiérrez Caro, Braulio, María Paz Molina Brand, and Santiago Barros Asenjo. "Selección de nuevas especies para zonas con déficit hídrico." Ciencia & Investigación Forestal 16, no. 2 (July 11, 2010): 161–84. http://dx.doi.org/10.52904/0718-4646.2010.343.

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Se evalúan preliminarmente los resultados de tres ensayos de especies y progenies de las especies Eucalyptus camaldulensis, E. cladocalyx, E. diversicolor, E. sideroxylon, E, tereticornis, E. tricarpa y Corymbia maculata, a dos y tres años de edad en la Región de Coquimbo, y de tres ensayos clonales de Eucalyptus camaldulensis a 10 meses de edad en las Regiones de Coquimbo y Valparaíso

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Schumacher, Mauro Valdir, and Fabio Poggiani. "Caracterização microclimática no interior dos talhões de Eucalyptus camaldulensis Dehnh, Eucalyptus grandis Hill ex Maiden e Eucalyptus torelliana F. Muell, localizados em Anhambi, SP." Ciência Florestal 3, no. 1 (March 30, 1999): 9. http://dx.doi.org/10.5902/19805098282.

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Neste estudo avaliou-se algumas características microclimáticas em talhões de E. camaldulensis, E. grandis e E. torelliana, resultantes dos diferentes tipos de cobertura florestal que estas espécies propiciam. Das três espécies estudadas, E. camaldulensis foi a que deixou passar as maiores quantidades de radiação solar global e intensidade luminosa. Já E. torellianafoi a espécie que mais interceptou a radiação solar e deixou o sub-bosque com menos luminosidade. As maiores temperaturas diárias e nos primeiros 10 cm do solo, foram observadas em E. camaldulensis. Para as três espécies, aos 20 cm de profundidade a variação da temperatura foi praticamente constante. Através dos resultados encontrados foi possível confirmar que as árvores de E. camaldulensis, E. grandis e E. torelliana, previamente estudadas na Austrália, pertencem, respectivamente, a formação de floresta aberta baixa, floresta aberta alta e floresta fechada.

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Alamu, O. T., R. A. Suleiman, A. E. Ayandokun, J. A. Ete, J. A. George-Onaho, and I. S. Agboola. "Pest status of termites on different Eucalyptus species in Afaka, Nigeria." Journal of Applied Sciences and Environmental Management 26, no. 1 (March 9, 2022): 71–74. http://dx.doi.org/10.4314/jasem.v26i1.11.

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Eucalyptus is one of the exotic tree species used for fuel wood and utility pole purposes in Northern Nigeria. The early stages of its plantation establishment face the challenges of insect attack, especially the subterranean termites. The pest status of termites on Eucalyptus tree species is a prerequisite for effective management strategies. This study assessed the pest status of termites on four Eucalyptus tree species: Eucalyptus camaldulensis, Eucalyptus citriodora, Eucalyptus cloeziana and Eucalyptus tereticornis in Afaka, Kaduna State, Nigeria. The four Eucalyptus species were planted in the field in a Randomized Complete Block Design and replicated three times. Seedling mortality counts were taken at 1, 2, 3, 6 and 12 months after transplanting. Mortality data were subjected ANOVA and significant means were separated using Tukey’s HSD (p = 0.05). The results showed that lower significant seedling mortality (9.66 ± 5.3%) was observed in E. camaldulensis at 1 month after transplanting. Seedling mortalities within a period of 1 – 12 months after transplanting ranged from 9.66±5.43 – 74.65±8.97%, 34.29±4.80 - 66.87±1.72%, 27.32±2.08 - 61.24±5.85% and 18.01±3.05 - 63.61±2.49% in E. camaldulensis, E. citriodora, E. cloeziana and E. tereticornis, respectively. It is therefore concluded from this study that the first year of Eucalyptus plantation establishment is critical for termite infestation and requires a prompt decision to embark on termite management strategies.

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Qi, Hong Chen, Wan Xi Peng, Yi Qiang Wu, and Ming Long Zhang. "Py-GC/MS Analysis on Biomedicine of Ether/Acetone Extractives from Eucalyptus camaldulensis Biomass." Advanced Materials Research 129-131 (August 2010): 1055–58. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.1055.

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Eucalyptus camaldulensis biomass has been widely used in fiber and pulp. However, this would result in serious water pollution and meanwhile bring a great waste of biological resources. Therefore, the ether/acetone extractives of Eucalyptus camaldulensis biomass were identified by Py-GC/MS. The main 350°С pyrolysis components were 7-Oxabicyclo[3.3.1]non- 2-ene,8-(4-methoxyphenyl)- 2,4,9-trimethyl- (7.1%), Indolo[2,3-b]quinoxaline, 1-fluoro(4.23%), etc. The main 550°С pyrolysis components were 7-Oxabicyclo[3.3.1]non-2-ene,8-(4-methoxyphenyl)- 2,4,9-trimethyl-(7.1%), Indolo[2,3-b]quinoxaline, 1-fluoro(4.23%), etc. And the main 750°С pyrolysis components were oleic acid(6.77%), 10,18-bisnorabieta-5,7,9(10),11,13 -pentaene(2.33%), 9,12-hexadecadienoic acid, methyl ester(2.12%), etc. So the ether/acetone extractives of Eucalyptus camaldulensis could be used as biomedicine.

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Santos, Rodrigo Souza, Roberto Gonçalves, and Norivaldo dos Anjos Silva. "Primeiro registro do besouro-amarelo-do-eucalipto em plantio de eucalipto no Estado do Acre." Revista Ceres 63, no. 4 (August 2016): 584–87. http://dx.doi.org/10.1590/0034-737x201663040020.

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RESUMO A ocorrência do besouro-amarelo-do-eucalipto, Costalimaita ferruginea (Fabricius) (Coleoptera: Chrysomelidae), foi confirmada em plantio de Eucalyptus pellita F. Muell, Eucalyptus urophylla S. T. Blake e Eucalyptus camaldulensis Dehn., no município de Senador Guiomard, Acre. O ataque foi constatado com maior intensidade em E. pellita, seguido por E. urophylla e E. camaldulensis em menor intensidade. Este é o primeiro registro dessa espécie de besouro desfolhador, em eucaliptais cultivados no Estado, contribuindo assim para o aumento do conhecimento sobre a distribuição geográfica desse inseto na região amazônica, bem como no Brasil.

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Ahmad, Irfan, Komal Mazhar, Muhammad Atiq, Amna Kahtan Khalaf, Muhammad Haroon U. Rashid, Muhammad Asif, Salman Ahmed, et al. "Epidemiology and management of Fusarium wilt of Eucalyptus camaldulensis through systemic acquired resistance." PeerJ 12 (March 29, 2024): e17022. http://dx.doi.org/10.7717/peerj.17022.

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Eucalyptus camaldulensis is a multifunctional tree and is globally used for the reclamation of problematic lands. Eucalyptus camaldulensis is prone to attack by a number of pathogens, but the most important threat is the Fusarium wilt (Fusarium oxysporum). Keeping in view the importance of E. camaldulensis and to manage this disease, five plant activators, i.e., salicylic acid (C7H6O3), benzoic acid (C7H6O2), citric acid (C6H8O7), dipotassium phosphate (K2HPO4), monopotassium phosphate (KH2PO4) and nutritional mixture namely Compound (NPK) and nutriotop (Fe, Zn, Cu, B, Mn) were evaluated in the Fusarium infested field under RCBD in the Research Area, Department of Forestry and Range Management, University of Agriculture, Faisalabad (UAF). Among plant activators, salicylic acid and a combination of compound + nutriotop exhibited the lowest disease incidence and enhanced fresh and dry weight of leaves compared to other treatments and control. Results of the environmental study indicated maximum disease incidence between 35–40 °C (max. T), 6–25 °C (mini. T), 70–80% relative humidity and 1.5–2.5 km/h wind speed while pan evaporation expressed weak correlation with disease development. It was concluded that Fusarium wilt of Eucalyptus camaldulensis could be managed through activation of the basal defense system of the host plant with provision of salicylic acid and balanced nutrition by considering environmental factors. Recent exploration is expected to be helpful for future research efforts on epidemiology and ecologically sound intervention of Fusarium wilt of Eucalyptus camaldulensis.

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Del Valle Pan, Estela Margaria, Juan Carlos Medina, Carlos Maximiliano Umlandt, Selva Azucena Barrionuevo, and Agustín Pascual Ruíz. "Comportamiento en el secado artificial de orígenes de Eucalyptus camaldulensis para su utilización como madera sólida." Ingeniería Solidaria 10, no. 17 (December 1, 2014): 11–18. http://dx.doi.org/10.16925/in.v9i17.789.

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La madera madura de Eucalyptus camaldulensis presenta buenas propiedades tecnológicas y aptitud para la obtención de productos sólidos. La madera joven proveniente de orígenes de Eucalyptus camaldulensis posee características físicas y mecánicas diferentes a la madera adulta, pues presenta comportamientos no apropiados durante su transformación mecánica. El objetivo del trabajo fue determinar cuáles orígenes exhiben mejor comportamiento en el secado artificial, lo que indicaría la calidad de estas maderas. La madera para los ensayos de secado consistió en individuos pertenecientes a siete orígenes de Eucalyptus camaldulensis (a, b, c, d, e, k, ll). El material fue seleccionado con base en la altura, porte, diámetro altura de pecho (dap), densidad y estado sanitario. Las trozas fueron aserradas obteniéndose tablas de 100 mm de ancho x 25 mm de espesor x 1000 mm de largo, estando cada carga de secado compuesta por madera proveniente de los 7 orígenes. Los orígenes de los Eucalyptus camaldulensis jóvenes no presentaron una tendencia marcada al colapso en ningún programa de secado. En relación con los alabeos, los orígenes b, a, c y ll fueron superiores a los orígenes e y k; mientras que, en el caso de las rajaduras los orígenes d y ll fueron superiores.

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McDonald, M. W., M. I. H. Brooker, and P. A. Butcher. "A taxonomic revision of Eucalyptus camaldulensis (Myrtaceae)." Australian Systematic Botany 22, no. 4 (2009): 257. http://dx.doi.org/10.1071/sb09005.

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Eucalyptus camaldulensis Dehnh. has one of the widest natural distributions of any Australian tree species. It is represented in most climatic zones and the majority of river systems across Australia. Numerous studies have documented morphological and genotypic variation among populations from across its range. Its adaptation to a wide range of environments has contributed to it becoming one of the most widely cultivated eucalypts across a range of arid, temperate and tropical countries. A recent range-wide study of E. camaldulensis with microsatellite markers concluded that its patterns of genetic variation were consistent with it comprising seven infraspecific taxa. As foreshadowed in that study, here we describe these taxa, viz. subsp. acuta, subsp. arida, subsp. camaldulensis, subsp. minima, subsp. obtusa, subsp. refulgens and subsp. simulata. A key to subspecies is presented, with each subspecies being illustrated and the main differences tabulated. Operculum shape, the arrangement of stamens in the bud and the reticulation density of adult leaves are some of the main characters distinguishing taxa. Clustering patterns from further analyses of the microsatellite data were consistent with morphological affinities among subspecies. Typification issues and lignotuber status are among topics discussed.

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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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Marsaro Júnior, Alberto Luiz, Adrián José Molina-Rugama, Carlos Alberto Lima, and Terezinha Maria Castro Della Lucia. "Preferência de corte de Eucalyptus spp. por Acromyrmex laticeps nigrosetosus Forel, 1908 (Hymenoptera: formicidae) em condições de laboratório." Ciência Florestal 17, no. 2 (June 30, 2007): 171. http://dx.doi.org/10.5902/198050981948.

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O objetivo deste trabalho foi avaliar a preferência de corte das operárias de Acromyrmex laticeps nigrosetosus Forel, 1908, em três espécies e um clone de eucalipto. Plantas de Eucalyptus urophylla S.T. Blake, 1977, Eucalyptus cloeziana F. Muell., 1878, Eucalyptus camaldulensis Dehnh., 1832, e o Clone 129 foram oferecidas, simultaneamente, para três colônias de Acromyrmex laticeps nigrosetosus Forel, 1908. O bioensaio finalizou 6 horas após o seu início ou até que uma das colônias cortasse todas as folhas de um dos eucaliptos oferecidos. As colônias cortaram e carregaram, em média, 0,453g ± 0,064 de Eucalyptus camaldulensis; 0,384g ± 0,052 do Clone 129; 0,341g ± 0,054 de Eucalyptus urophylla e 0,102 ± 0,027 de Eucalyptus cloeziana, sendo essa última a espécie menos preferida para o corte. Por outro lado, não houve diferença significativa entre a quantidade de folhas cortadas nos outros eucaliptos.

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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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Haines, PJ, AB Bell, and LP Thatcher. "Evaluation of some factors involved in reducing browsing damage to eucalypt trees by sheep." Australian Journal of Experimental Agriculture 34, no. 5 (1994): 601. http://dx.doi.org/10.1071/ea9940601.

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These experiments evaluated in northeastern Victoria the factors affecting the severity of browsing damage to eucalypts by sheep. We aimed to develop management options for integrating sheep grazing in agroforestry systems. One-year-old tree seedlings were planted into annual pasture and grazed at high stocking rates (44 sheep/ha) for up to 1 week when the pasture was abundant. In experiments 1 and 2, crossbred weaners almost totally defoliated Eucalyptus camaldulensis (river red gum) seedlings after 96 h grazing; damage from older Merino wethers was minimal. Of the 4 eucalypt species tested for relative acceptability or palatability to crossbred weaners, E. camaldulensis was the most heavily browsed and E. globulus spp. bicostata (southern blue gum), least. The height of the pasture immediately surrounding the seedlings, and therefore visibility of the seedling to the sheep, did not affect browsing extent. In experiment 3, potential repellents were applied either on the ground around E. camaldulensis seedlings or sprinkled on the foliage. Six repellants provided short-term protection from crossbred weaner sheep; Replex 1 and 3, and egg and paint were the most effective. After 4 days grazing, seedlings treated with Replex 3 had sustained 24% mean browsing damage compared with 90% for the control.

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23

Quintilhan, Manolo Trindade, Weslley Candido de Oliveira, Aylson Costa Oliveira, Bárbara Luísa Corradi Pereira, and Romulo Môra. "PHYSICAL PROPERTIES AND PRESERVATIVE TREATMENT OF EUCALYPTUS AND CORYMBIA WOOD." FLORESTA 51, no. 2 (March 16, 2021): 410. http://dx.doi.org/10.5380/rf.v51i2.69280.

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The properties of wood influence its use as a final product, so it is essential to know their relation and influence on the quality of preservation. In this sense, for the present study we aim at the determination of the physical properties of Corymbia citriodora [Eucalyptus citriodora Hook]; Eucalyptus camaldulensis Dehnh. and Eucalyptus camaldulensis Dehn. x Eucalyptus grandis, and the quality of the preservative treatment with CCA-C in an autoclave. We determined diameter, heartwood and sapwood percentages, and their relationship, as well as the basic density for the three genetic materials. The quality of the preservation was evaluated through the area treated and not treated by CCA, besides its penetration and retention. The highest proportion of sapwood, treated area, and highest density value was found in C. citriodora, whereas the hybrid E. camaldulensis x E. grandis presented the highest level of CCA retention. The diameter and density showed the highest correlation with CCA retention in wood, the length and moisture of the small logs also shown to be influential. All clones presented satisfactory chemical treatment quality for use as fence posts.

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A. Kasir, Walid. "UTILIZATION OF EUCALYPTUS CAMALDULENSIS BARK EXTRACT." Mesopotamia Journal of Agriculture 34, no. 4 (December 28, 2006): 107–13. http://dx.doi.org/10.33899/magrj.2006.26440.

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., Fazal Rahim, Mussarrat Jabeen ., and Ihsan Ilahi . "Mass Propagation in Eucalyptus camaldulensis Dehn." Asian Journal of Plant Sciences 2, no. 2 (January 1, 2003): 184–87. http://dx.doi.org/10.3923/ajps.2003.184.187.

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26

Thwaites, Vivonne. "KARRA:KARRAWIRRAPARRI-RIVER RED GUM-EUCALYPTUS CAMALDULENSIS." Ethics & the Environment 8, no. 1 (March 2003): 51–56. http://dx.doi.org/10.2979/ete.2003.8.1.51.

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Kabiru, Y. A., E. O. Ogbadoyi, J. I. Okogun, T. A. Gbodi, and H. A. Makun. "Anti-trypanosomal Potential of Eucalyptus Camaldulensis." British Journal of Pharmacology and Toxicology 4, no. 2 (April 25, 2013): 25–32. http://dx.doi.org/10.19026/bjpt.4.5374.

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Watanabe, Keisuke, Yoshinori Shono, Akiko Kakimizu, Akihiko Okada, Noritada Matsuo, Atsushi Satoh, and Hiroyuki Nishimura. "New mosquito repellent from Eucalyptus camaldulensis." Journal of Agricultural and Food Chemistry 41, no. 11 (November 1993): 2164–66. http://dx.doi.org/10.1021/jf00035a065.

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Girijashankar, V. "In vitro regeneration of Eucalyptus camaldulensis." Physiology and Molecular Biology of Plants 18, no. 1 (December 30, 2011): 79–87. http://dx.doi.org/10.1007/s12298-011-0092-4.

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30

James, SA, and DT Bell. "Leaf Orientation in Juvenile Eucalyptus camaldulensis." Australian Journal of Botany 44, no. 2 (1996): 139. http://dx.doi.org/10.1071/bt9960139.

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Leaves of six genotypes of Eucalyptus camaldulensis Dehnh. from five Australian locations were compared. The juvenile plants were approximately 6 months old, an age related to field planting times in salinised and waterlogged agricultural catchments. The leaves of juvenile plants of Eucalyptus camaldulensis do not exhibit solar-tracking, but leaf orientation is believed to maximise solar radiation absorption. Through vertically-tilted leaves and rotated leaf blade orientation, replicate clonal plantlets from Erudina, SA, potentially absorbed at mid-morning, mid-day and mid-afternoon, an average of 71%, 15% and 74%, respectively, more photosynthetically active radiation than a theoretical plant with horizontal, non-self shading leaves during spring. This clone intercepted, on average, between 67% and 76% of all the solar radiation potentially intercepted if all leaf blades faced the sun throughout the day and no leaf shading occurred. Clonal plantlets from Silverton, NSW, and Dongara, WA, also displayed leaf orientations that showed greater radiation interception compared to a theoretical plant with horizontal leaves. Two genotypes from Wooramel, WA, and a genotype from Murray Bridge, SA, showed a 13-24% reduction in interception in the middle of the day compared to the theoretical plant with all horizontal and non-shading leaves, but 15-96% more radiation during the morning and evening through leaf orientation. Morphological and anatomical leaf characteristics of these clones tended to show characteristics typical of 'sun-leaves', or leaves developed under high light conditions. The Erudina, SA, and Silverton, NSW, clones, having the greatest potential light interception through leaf orientation, produced leaves with a more glaucous, light-reflective surface. Glaucescence may protect against too much light being absorbed by the leaves of these clones. Variation in the degree of orientation of leaves in these six genotypes of E. camaldulensis indicates that it could be possible to select clones which maximise energy utilisation during periods of lower light availability and, hence, have enhanced growth and survival in early stages of establishment.

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Mullins, K. V., D. J. Llewellyn, V. J. Hartney, S. Strauss, and E. S. Dennis. "Regeneration and transformation of Eucalyptus camaldulensis." Plant Cell Reports 16, no. 11 (September 4, 1997): 787–91. http://dx.doi.org/10.1007/s002990050321.

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Godoy B., Roberto, Carlos Riquelme, Hernán Peredo López, and Rubén Carrillo. "Compatibilidad y eficiencia de hongos micorrízicos vesículo-arbusculares en Eucalyptus camaldulensis Dehnh. y Quillaja saponaria Mol." Ciencia & Investigación Forestal 5, no. 2 (July 6, 1991): 237–50. http://dx.doi.org/10.52904/0718-4646.1991.154.

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Se desarrolla un ensayo de inoculación controlada en invernadero con 6 cepas comerciales de hongos micorrízicos vesículo-arbusculares en dos especies seleccionadas para la zona semiárida de Chile: Eucalyptus camaldulensis y Quillaja saponaria La detección de colonización primaria por los simbiontes a las 8 semanas de la inoculación, registró asociaciones en todos los tratamientos a excepción de Gigaspora margarita en Eucalyptus camaldulensis. Al término del ensayo de 20 semanas se determinó el grado de micorrización y se midieron variables morfométricas para establecer la eficiencia de las cepas micorrízicas mediante el índice de calidad de las plántulas. Todos los tratamientos inoculados presentaron asociación simbiótica con ambos hospedantes. El análisis de las variables morfométricas para Eucalyptus camaldulensis determina que Glomus versiforme y Glomus intraradices resultan con valores de significación superiores al control, sin embargo, el índice de caidad no estableció diferencia estadística. Para Quillaja saponaria estos valores fueron similares en Glomus aggregatum y Glomus intraradices teniendo este último un índice de calidad estadísticamente significativo.

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Kawaoka, A., K. Nanto, K. Ishii, and H. Ebinuma. "Reduction of Lignin Content by Suppression of Expression of the LIM Domain Transcription Factor in Eucalyptus camaldulensis." Silvae Genetica 55, no. 1-6 (December 1, 2006): 269–77. http://dx.doi.org/10.1515/sg-2006-0035.

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Abstract We report a reduction of lignin content in the woody plant Eucalyptus camaldulensis by the suppression of gene expression of the LIM domain transcription factor. Previously, we identified a cDNA encoding the tobacco (Nicotiana tabacum) LIM domain transcription factor, Nt1iml, involved in lignin biosynthesis and that specifically binds to an important cis-acting element, the PALbox sequence. The orthologous Eucalyptus gene of Ntliml, namely Ecliml, was isolated from the E. camaldulensis cDNA library (84% amino acid identity). The antisense Ntliml construct with a kanamycin-resistant gene was introduced into E. camaldulensis. The transgenic Eucalyptus plants grown in the greenhouse showed decreased expression levels of severallignin biosynthesis genes, phenylalanine ammonialyase (PAL), cinnamate-4-hydroxylase (C4H) and 4-hydroxycinnamate CoA ligase (4CL). The abnormal phenotypic changes and a 29% reduction of lignin content were observed in the line LG12, in which the transcript level of Ecliml was most1y suppressed. Ec1iml is one of the key transcription factors involved in lignin biosynthesis.

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Hegde, Ramakrishna, and Mohan Varghese. "Genetic divergence analysis in Eucalyptus camaldulensis Dehnh." Indian Journal of Forestry 31, no. 1 (March 1, 2008): 61–66. http://dx.doi.org/10.54207/bsmps1000-2008-jz69n7.

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Eucalyptus camaldulensis Dehnh. is one of the important tree species used in modern plantation forestry programme. The genetic divergence analysis helps in assessing the genetic diversity within the species and also provide information for developing breeding plan, establishment of seed orchards and exploitation of heterosis through hybridization. In the present study attempts were made to assess the genetic diversity among the different open pollinated families of E. camaldulensis based on growth parameters at 24 months of age in three different locations.

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Balasaravanan, T., P. Chezhian, R. Kamalakannan, R. Yasodha, M. Varghese, K. Gurumurthi, and M. Ghosh. "Identification of Species-Diagnostic ISSR Markers for Six Eucalyptus Species." Silvae Genetica 55, no. 1-6 (December 1, 2006): 119–22. http://dx.doi.org/10.1515/sg-2006-0017.

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Abstract Eucalyptus is planted worldwide for raw material in paper and rayon industry. It is a potential out-crosser and the natural populations are highly heterogeneous displaying strong inbreeding depression. Eucalyptus hybrids have been intensively utilized for their vigor, higher wood quality and resistance to diseases. Identification of species for hybridization is predominantly based on morphological characters and is not always reliable. Hence, DNA marker based species identification and hybrid validation is an important and efficient tool in breeding programs. In the present study, attempts were made to identify species - diagnostic markers for six eucalypt species (E. camaldulensis Dehnh, E. citriodora Hook, E. grandis W. Hill ex Maiden, E. pellita F. Muell, E. tereticornis Sm and E. urophylla S.T. Blake) using ISSR-PCR fingerprints. PCR amplification using seven ISSR primers resulted in significant polymorphism among the population from different species. E. citriodora and E. tereticornis showed monomorphic frequency of maximum 37.5% and minimum 14.3% respectively. Twenty species-diagnostic markers were identified for E. camaldulensis, E. citriodora, E. grandis and E. urophylla while no marker was detected for E. pellita and E. tereticornis. A maximum of eleven and a minimum of one species-diagnostic marker were recorded for E. citriodora and E. camaldulensis respectively. Among the twenty markers, nine were present in all the individuals of a particular species.

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S. A. Al-Hayanni, Huda, and Hamed El-Shora. "Various Extracts of Some Medicinal Plants as Inhibitors for Beta-lactamase Activity." Baghdad Science Journal 18, no. 1 (March 10, 2021): 0047. http://dx.doi.org/10.21123/bsj.2021.18.1.0047.

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The inhibitory effect of acetone, ethanol, and aqueous extracts of ten medicinal plants on β-lactamase from Staphylococcus sciuri and Klebsiella pneumoniae was investigated in vitro by starch-iodine agar plate method. The results revealed the success of starch-iodine method for the detection of the inhibition of β-lactamase activity by the various extracts of each individual plant. The acetone extracts of Catharanthus roseus, Eucalyptus camaldulensis, and Schinus terebinthifolius induced an inhibitory effect on β-lactamase from Staphylococcus sciuri. On the other hand, acetone extracts from only Eucalyptus camaldulensis, and Schinus terebinthifolius expressed strong inhibitory effect on β-lactamase from Klebsiella pneumoniae. The acetone extracts expressed the highest inhibition for β-lactamases activity compared to ethanolic and aqueous extracts which exhibited appreciable inhibitory effect. β-lactamase from S. sciuri was inhibited by extracts from C. roseus, E. camaldulensis and S. terebinthifolius whereas β-lactamase from K. pneumoniae was inhibited only by extracts from E. camaldulensis and S. terebinthifolius.

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Abbas, Ali, Farooq Anwar, Safar M. Alqahtani, Naveed Ahmad, Samiah H. Al-Mijalli, Muhammad Shahid, and Munawar Iqbal. "Hydro-Distilled and Supercritical Fluid Extraction of Eucalyptus camaldulensis Essential Oil: Characterization of Bioactives Along With Antioxidant, Antimicrobial and Antibiofilm Activities." Dose-Response 20, no. 3 (July 2022): 155932582211254. http://dx.doi.org/10.1177/15593258221125477.

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Present research work evaluates variation in volatile chemicals profile and biological activities of essential oil (EO) obtained from the leaves of eucalyptus ( Eucalyptus camaldulensis Dehnh.) using hydro-distillation (HD) and supercritical fluid extraction (SFE). The yield (1.32%) of volatile oil by HD was higher than the yield (.52%) of the SFE method ( P < .05). The results of physical factors like density, color, refractive index, and solubility of the EOs produced by both the methods showed insignificant variations. Gas chromatography - mass spectrometry (GC-MS) compositional analysis showed that eucalyptol (31.10% and 30.43%) and α-pinene (11.02% and 10.35%) were the main constituents detected in SFE and HD extracted Eucalyptus camaldulensis EO, respectively. Antioxidant activity-related parameters, such as reducing ability and DPPH free radical scavenging capability exhibited by EO obtained via SFE were noted to be better than hydro-distilled EO. Supercritical fluid extracted and hydro-distilled essential oils demonstrated a considerable but variable antimicrobial potential against selected bacterial and fungal strains. Interestingly, oil extracted by SFE showed relatively higher hemolytic activity and biofilm inhibition potential. The variation in biological activities of tested EOs can be linked to the difference in the volatile bioactives composition due to different isolation techniques. In conclusion, the EO obtained from Eucalyptus leaves by the SFE method can be explored as a potential antioxidant and antimicrobial agent in the functional food and nutra-pharmaceutical sector.

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Nasser, Mohamad, Amal A. Alyamani, Anis Daou, Malak Nasser, Zahraa Saad, Akram Hijazi, Marc Maresca, and Marc Nasser. "Influence of the Extraction Solvent and of the Altitude on the Anticancer Activity of Lebanese Eucalyptus camaldulensis Extract Alone or in Combination with Low Dose of Cisplatin in A549 Human Lung Adenocarcinoma Cells." Processes 10, no. 8 (July 26, 2022): 1461. http://dx.doi.org/10.3390/pr10081461.

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Background: Lung cancer is the second most common cancer worldwide. Eucalyptus plant extract has been shown to have anti-neoplastic effects. We investigated the antitumor effect of ethanolic and aqueous extracts of Eucalyptus camaldulensis collected at different altitudes on A549. In addition, we evaluated the additive effect of its combination with low-dose cisplatin (CDDP). Methods: Qualitative and quantitative analyses of secondary metabolites present in the plants were carried out. The antioxidant and cytotoxic activities of the different extracts on A549 were evaluated using the 2.2-diphenyl-1-picrylhydrazyl radical scavenging activity and neutral red assay, respectively. The cytotoxic effect of the combination of certain extract concentrations with low-dose CDDP on A549 cells was studied. Results: In the Ethanoic extract, a higher number of active substances and antioxidant activities were observed. The four E. camaldulensis extracts showed cytotoxic activity on A549 cells, with a higher cytotoxicity for the Ethanoic extract and the sea-level altitude species. Moreover, the dual exposure of cells to both E. camaldulensis extracts and a low dose of Cisplatin showed an additional cytotoxic effect on A549 cells in certain concentrations. Conclusions: This study opens novel therapeutic options in combinational therapies of Eucalyptus camaldulensis with low-dose CDDP for the treatment of adenocarcinoma cells of human lungs.

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Malumphy, C., R. Guillem, C. Perez, and K. Bensusan. "Insect pest species of Eucalyptus in Gibraltar." Entomologist's Monthly Magazine 156, no. 1 (January 31, 2020): 51–57. http://dx.doi.org/10.31184/m00138908.1561.4010.

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Four invasive eucalypt-feeding insects, native to Australia, are recorded from Gibraltar for the first time: the gall-forming wasps Ophelimus maskelli (Ashmead) and Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae), the lerp-forming psyllid Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae), and the bronze bug Thaumastocoris peregrinus Carpintero & Dellapé (Hemiptera: Thaumastocoridae), whilst the status of two Eucalyptus longhorned borers, Phoracantha recurva Newman and P. semipunctata (Fabricius) (Coleoptera: Cerambycidae), is summarised. The former five species have been found on the red-gum tree Eucalyptus camaldulensis Dehnh., growing in the urban environment in Gibraltar. The potential impact of these invasive species is discussed.

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Alcântara, Berenice K. de, Daniel Pizzaia, Fernando A. Piotto, Lucélia Borgo, Gilvano E. Brondani, and Ricardo A. Azevedo. "Temporal dynamics of the response to Al stress in Eucalyptus grandis × Eucalyptus camaldulensis." Anais da Academia Brasileira de Ciências 87, no. 2 (June 9, 2015): 1063–70. http://dx.doi.org/10.1590/0001-3765201520140322.

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Lipid peroxidation and root elongation of Eucalyptus grandis × Eucalyptus camaldulensis were studied under stress conditions in response to aluminum (Al), a metal known to limit agricultural productivity in acidic soils primarily due to reduced root elongation. In Brazil, the Grancam 1277 hybrid (E. grandis × E. camaldulensis) has been planted in the "Cerrado", a region of the country with a wide occurrence of acidic soils. The present study demonstrated that the hybrid exhibited root growth reduction and increased levels of lipid peroxidation after 24h of treatment with 100 µM of Al, which was followed by a reduction in lipid peroxidation levels and the recovery of root elongation after 48h of Al exposure, suggesting a rapid response to the early stressful conditions induced by Al. The understanding of the temporal dynamics of Al tolerance may be useful for selecting more tolerant genotypes and for identifying genes of interest for applications in bioengineering.

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Thuy, Nguyen Van, Nguyen Minh Tien, Nguyen Ngoc Quy, Mai Huyng Cang, Pham Minh Quan, Le Minh Bui, Le Van Minh, and Nguyen Van Muoi. "Preliminary Chemical, Total Polyphenol, Total Flavonoid Contents and Antioxidant Activity of Eucalyptus camaldulensis Dehnh." Asian Journal of Chemistry 32, no. 5 (2020): 1230–34. http://dx.doi.org/10.14233/ajchem.2020.22257.

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This study aimed to identify phytochemicals and evaluate antioxidant activities of different extracts from Eucalyptus camaldulensis, an aromatic plant in the Myrtaceace family. Examined extracts in different solvents such as diethyl ether extract (DEE), the ethanolic extract (EE) and the aqueous extract (AE). Total polyphenol and total flavonoid contents were determined via aluminum chloride colorimetric method. Antioxidant activity was performed via ABTS and DPPH radical scavenging assays. The results showed that a wide variety of pharmacologically active compounds such as alkaloid, oil, flavonoid, triterpenoid, saponin, tannin and polyphenol were present in the leaves of Eucalyptus camaldulensis. The result of quantitative determination showed that total polyphenol content of the diethyl ether extract, ethanolic extract and aqueous extract achieved 73.47 ± 1.64, 306.48 ± 3.87 and 76.47 ± 1.64 mgGAE/g, respectively. Meanwhile, total flavonoid content was 41.74 ± 2.21, 45.98 ± 1.79 and 18.05 ± 0.81 mgQE/g, respectively. The ethanolic extract exhibited the highest DPPH (IC50 = 10.52 ± 0.14 μg/mL) and ABTS (IC50 = 9.86 ± 0.17 μg/mL). These results indicate that Eucalyptus camaldulensis leaves can be used in dietary applications with the potential to reduce oxidative stress.

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Afshan Zia, Sadia Tahir, Saba Saba, Abid Hussain, Iqra Arooj, and Laraib Aslam. "Antibacterial and Antibiofilm Activity of Eucalyptus camaldulensis Derived Fe3O4 Nano-particles against Foodborne Pathogens." Lahore Garrison University Journal of Life Sciences 8, no. 1 (March 15, 2024): 97–116. http://dx.doi.org/10.54692/lgujls.2024.0801325.

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Foodborne pathogens are zoonotic and multidrug resistant, which are not only affecting economy but also accountable for public health burdens. The present study was aimed to evaluate the efficacy of medicinal plant i.e., Eucalyptus camaldulensis extract mediated Fe3O4 and ZnO nanoparticles against the 27 foodborne pathogenic strains, isolated from milk, meat, dry fruits and vegetable samples collected from Multan, Pakistan. In phytochemical screening, the plant extract was found to contain numerous bioactive compounds including flavonoids, phenolic compounds, tannins, quinones, and anthocyanins. Fe3O4 NPs synthesized from Eucalyptus camaldulensis displayed the highest antibacterial activity with zones of inhibition of 12-13mm against pathogens. Fe3O4 NPs were found to have highest anti-inflammatory potential with recorded percentage of 67% at 40 μg/ml. Fe3O4 NPs also demonstrated the highest antibiofilm activity after 120 hours of incubation. For DDPH antioxidant assay, the highest antioxidant activity was displayed by Fe3O4 NPs and their absorbance recorded was 1.43. Therefore, Eucalyptus camaldulensis mediated Fe3O4 NPs proved as an effective and eco-friendly approach to combat multidrug resistance in bacterial infections throughcharacteristic antibacterial, antibiofilm and antioxidant properties.

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Swaminathan, C., K. Bhavanisanker, and Jeff Hann. "Influence of FA resin and Linseed oil preservatives on mechanical properties of Heartwood of Eucalyptus camaldulensis Dehnh." Indian Journal of Forestry 27, no. 4 (December 1, 2004): 388–90. http://dx.doi.org/10.54207/bsmps1000-2004-jr961n.

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Eucalyptus camaldulensis Dehnh. called as River Red Gum, is a medium to large hardwood found adjacent to most of the inland rivers of mainland Australia. The durability of the wood is low compared to other hardwoods. There has been an increased interest in treatment of hardwoods with preservatives for wood protection and increasing the life of treated wood. Several studies were conducted on use of preservatives for hardwoods. This study was taken up to find out the influence of Resin and Linseed oil preservative treatments on the wood quality in heartwood of Eucalyptus camaldulensis. Wood samples treated with FA resin had higher values for MOE and MOR, which were 17.5 GPa and 124.7 MPa respectively, compared to Linseed oil treated samples. The results indicated that the uptake of Furfuryl Alcohol (FA) resin was 13.0 l m-3 and that of Linseed oil was 9.7 l m-3. From the study it may be inferred that the mechanical properties of heartwood of Red Gum (Eucalyptus camaldulensis) could be enhanced by FA resin treatment for two hours.

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Lisboa, Lucas Aparecido Manzani, Allan De Marcos Lapaz, Thadeu Henrique Novais Spósito, Ronaldo Da Silva Viana, and Paulo Alexandre Monteiro De Figueiredo. "GROWTH, DEVELOPMENT AND FOLIARY ULTRASTRUCTURAL PARAMETERS OF DIFFERENT EUCALYPTUS GENETIC MATERIALS." FLORESTA 49, no. 1 (December 17, 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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Zainab Muhsan, Alnaji, and Ali Ali Khalaf. "Histological Study for Median lethal Dose (LD50) of Eucalyptus Oil Administrated Orally in ( Mice mus musculus)." Bionatura 7, no. 2 (May 15, 2022): 1–7. http://dx.doi.org/10.21931/rb/2022.07.02.49.

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Eucalyptus oil is used in a wide range of medicinal and other uses, and the current study aims to estimate the median lethal dose LD50 of eucalyptus oil of Eucalyptus camaldulensis and estimate the pathological effect of eucalyptus oil in mice. Eucalyptus oil was obtained in the study by extracting the leaves of the plant Eucalyptus camaldulensis using hydrodistillation. Toxicity testing was performed by dividing mice into groups that you treated with different doses of eucalyptus oil 1200, 1600, 2000, and 2400 mg/kg. The current study showed that the average lethal dose, the LD50, was 1820 mg/kg. The study suggested the emergence of clinical signs in mice when consuming eucalyptus oil in high doses, such as slow movement, suffocation, and convulsion, compared with the control group and the group that administered a lower dose, It was observed that high doses of eucalyptus oil could cause damage to the lung, liver, kidneys, and heart, as the lung was the organ most affected by the oil, followed by the liver, kidneys, and then the heart, and it was less affected by eucalyptus oil, and this indicates that eucalyptus oil, when administered orally in high doses, causes clear toxicity effects. Eucalyptus oil is a safe medicine for external use. Keywords. Eucalyptus oil, LD50; Administrated; Lung; Liver; Heart; Kidney; Mice.

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Perry, Ed, and Gary Hickman. "Wound Closure in Eucalyptus." Arboriculture & Urban Forestry 13, no. 8 (August 1, 1987): 201–2. http://dx.doi.org/10.48044/jauf.1987.043.

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A two-year study was conducted to evaluate seasonal differences in the rate of wound closure in Eucalyptus camaldulensis. Wound closure was measured 3, 6, 9 and 12 months after wounding. Wounds made in spring closed most rapidly. Slowest closure was recorded for wounds made during late fall and early winter.

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Al-Tameemi, Zahraa S., and Maha N. Hamad. "Isolation of Three Secondary Metabolites from the Eucalyptus camaldulensis Dehnh. Plant for the First Time." INTERNATIONAL JOURNAL OF DRUG DELIVERY TECHNOLOGY 12, no. 01 (June 25, 2022): 55–62. http://dx.doi.org/10.25258/ijddt.12.1.10.

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Objectives: Phytochemical screening and identification of certain types of secondary metabolites that not separated yet from the Eucalyptus camaldulensis plant. Background: E. camaldulensis Dehnh. (Family: Myrtaceae) is one of the most widely distributed species of eucalyptus trees and the original land of this variety is Australia. E. camaldulensis Dehnh. is the main species that distributed in various regions of Iraq. E. camaldulensis has active constituents rich in pharmacologically significant secondary metabolites with proven activities including anti-bacterial, anti-fungal, anti-viral, anti-oxidant, and others. Methodology: Defatting step of leaves and fruits separately with n-hexane was preceding the extraction process by maceration with 50% acetone followed by subsequent fractionation process and isolation step achieved by thin-layer chromatography (TLC) and high-performance liquid chromatography (HPLC). Results: The resulting three fractions had been undergone preliminary chemical tests suggesting the presence of steroids, terpenoids, and tannins. The isolation process had been given rise to the separation of three phytoconstituents identified by different chromatographic techniques resulting in the confirmation of the non-polar compounds isolated from the hexane fraction comprising the phytosterol stigmasterol and the possible diterpene turraeanin J. The polar secondary metabolite isolated from the ethyl acetate fraction is the dimer tannin oenothein B. Conclusion: The Iraqi E. camaldulensis plant rich in various secondary metabolites presents diverse pharmacological activities. The first isolation might be around the world from the Eucalyptus genus, is the expected diterpene turraeanin J, and the first isolation from the species around the world are oenothein B and stigmasterol.

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Ferreira, C. S., L. C. Torres, C. F. Carvalho, and B. Souza. "OCORRÊNCIA DE BEMISIA TABACI BIÓTIPO B EM EUCALYPTUS CAMALDULENSIS." Arquivos do Instituto Biológico 75, no. 4 (October 2008): 527–28. http://dx.doi.org/10.1590/1808-1657v75p5272008.

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RESUMO A ocorrência da mosca-branca Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae) foi registrada pela primeira vez em mudas de Eucalyptus camaldulensis Dehn. em Lavras, Estado de Minas Gerais. O ataque foi observado no dia 16/1/2007 em 30 mudas de E. camaldulensis mantidas em casa-de-vegetação. As plantas infestadas apresentavam-se amarelecidas e em estágio inicial de definhamento como resposta ao ataque do inseto.

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Tuller, Juliana, Karla Nunes Oliveira, Jhonathan Oliveira Silva, Maurício Lopes de Faria, Mario Marcos do Espírito-Santo, José Eduardo Serrão, and José Cola Zanuncio. "Glycaspis brimblecombei (Hemiptera: Psyllidae) attack patterns on different Eucalyptus genotypes." PeerJ 5 (October 24, 2017): e3864. http://dx.doi.org/10.7717/peerj.3864.

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Background The red gum lerp psyllid, Glycaspis brimblecombei Moore (Hemiptera: Psyllidae), an eucalypt insect pest from Australia, was reported in Brazil in 2003. This study evaluated damage patterns of this pest on Eucalyptus camaldulensis Dehn (Myrtaceae) and its hybrids E. urophylla X E. camaldulensis (urocam) and E. urophylla X E. grandis (urograndis). In addition, parasitism rates of Psyllaephagus bliteus Riek (Hymenoptera: Encyrtidae) on G. brimblecombei collected on different eucalypt genotypes are reported. Methods Plantation plots of three eucalypt genotypes were evaluated over one year. The eucalypt leaves were collected and examined for attack by G. brimblecombei. Nymph parasitism of G. brimblecombei by P. bliteus was recorded. Results Damage by G. brimblecombei was lower on the hybrid genotypes and on the adaxial surface of the eucalypt leaves. G. brimblecombei egg and nymph density were negatively correlated with monthly rainfall. Nymph parasitism of G. brimblecombei by P. bliteus was low (2.9%) independent of genotype and did not vary throughout the year. Discussion Our data indicate the use of less susceptible eucalypt genotypes (e.g., hybrids) as an alternative to G. brimblecombei management. Because of the current low mortality rates for G. brimblecombei resulting from P. bliteus parasitism, biological control with this natural enemy is not recommended as a management strategy for G. brimblecombei.

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Rojas Vergara, Patricio, Patricio Arce Johnson, and Manuel Arriagada B. "Propagación vegetativa por estacas en Eucalyptus camaldulensis Dehnh." Ciencia & Investigación Forestal 1, no. 2 (June 17, 1987): 1–9. http://dx.doi.org/10.52904/0718-4646.1987.5.

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Se evalúa el arraigamiento de estacas de E. camaldulensis a partir de material proveniente de rebrotes, en condiciones ambientales controladas de luz, temperatura del sustrato, temperatura ambiental, humedad relativa y riego automático. El material colectado proviene de vástagos de árboles adultos seleccionados de las parcelas experimentales de introducción de especies de InFor. Se evaluó el efecto de la variabilidad individual, la concentración de hormonas y el tipo de sustrato en la capacidad de arraigamiento de estacas de E. camaldulensis para bosquejar protocolos de propagación de especies del género Eucalyptus.

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Journal articles on the topic 'Eucalyptus camaldulensis'

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