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Journal articles on the topic 'Eucalyptus grandis Propagation'

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Published: 10 December 2022
Last updated: 29 January 2023

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1

Sita, G. Lakshmi, and B. Shobha Rani. "In vitro propagation of Eucalyptus grandis L. by tissue culture." Plant Cell Reports 4, no. 2 (April 1985): 63–65. http://dx.doi.org/10.1007/bf00269207.

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2

Sarpong, Nana Yaw, Frank Ofori Agyemang, Daniel E.K.A Siaw, and Essakku Menason. "EFFECT OF DIFFERENT LEVELS OF I.B.A CONCENTRATION ON CLONAL PROPAGATION OF EUCALYPTUS SPECIES IN GHANA WEST AFRICA." Tropical Agroecosystems 2, no. 1 (November 13, 2020): 26–29. http://dx.doi.org/10.26480/taec.01.2021.26.29.

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Effective rooting and survival of cuttings has become more important owing to increased global wood demands and climate change. This study assesses the survival of ten (10) clones each of Eucalyptus grandis x Eucalyptus urophylla (E. grandis x E. urophylla) and Eucalyptus pellita (E. pellita) clonal cuttings when treated with different Indole-3-butyric acid (IBA) auxin concentrations of 0 ppm (control), 2000 ppm, 3000 ppm and 4000 ppm respectively. Overall, the mean survival of cuttings with respect to both species (10 clones each) was low (i.e < 50%) for all concentrations of IBA used. E. grandis x E. urophylla cuttings had the highest mean survival (43.39%) when treated with 2000 ppm of IBA and lowest mean survival (37.86%) when treated with 0 ppm. E. pellita (P) cuttings had the highest mean survival (27.14%) when treated with 2000 ppm of IBA. Individual clones however showed higher survival with respect to IBA treatments. Eucalyptus grandis x Eucalyptus urophylla clone (GH11) achieved a mean survival rate of 75% with 2000ppm of IBA. E. pellita clone P2 achieved its highest survival (52.68%) in the control experiment (0 ppm). Although IBA application had significant effect on cutting survival, parent material (individual clones) also plays a vital role in cutting survival as some clones such P51 and P82 achieved survivals of less than 10% given all four levels of IBA used. Individual clones also respond to IBA concentration differently. GH3 and GH10 had their highest survivals (i.e 66.07% and 61.61% respectively) in the control (0ppm of IBA). Results from this study can be used in plus tree clonal selection regimes to identify the best economically rewarding clones in terms of cutting survival to be used in forest plantation establishments.
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3

MacRae, Sharmane, and J. Van Staden. "In Vitro culture of Eucalyptus grandis: Effect of gelling agents on propagation." Journal of Plant Physiology 137, no. 2 (December 1990): 249–51. http://dx.doi.org/10.1016/s0176-1617(11)80092-1.

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4

Mokotedi, M. E. O., M. P. Watt, and N. W. Pammenter. "THE INFLUENCE OF VEGETATIVE PROPAGATION METHODS ON ROOT FUNCTIONING IN EUCALYPTUS GRANDIS × NITENS." Acta Horticulturae, no. 812 (February 2009): 395–402. http://dx.doi.org/10.17660/actahortic.2009.812.55.

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5

Pinto, João Mário Andrade, Eduardo Chahud, and Carlos Alberto Cimini. "Evaluation of compressive strength for the wood Eucalyptus grandis using ultrasonic wave propagation." European Journal of Wood and Wood Products 73, no. 1 (October 15, 2014): 127–29. http://dx.doi.org/10.1007/s00107-014-0854-0.

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6

Rizzo, Pedro F., María C. Salinas, Virginia Della Della Torre, Juan P. Diez, Leonardo F. Sallesses, Nicolás I. Riera, Pablo S. Pathauer, Dimitrios Komilis, and Antoni Sánchez. "Effect of Poultry Manure-Derived Compost on the Growth of eucalypts spp. Hybrid Clones." Processes 10, no. 11 (October 25, 2022): 2182. http://dx.doi.org/10.3390/pr10112182.

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Interspecific hybrids of E. grandis × E. camaldulensis were generated to widen the plantation area. The aim of this study was to assess root capability and development for six different clones of eucalyptus grown in substrates made with three different composts derived from poultry manure. A factorial design was used to assess the effect of different composts on six growth variables. The analysis detected a greater effect from the genotype than the substrate. E. grandis × E. camaldulensis hybrid vegetative propagation was successful in alternative substrates formulated from composted poultry manure. GC8 was the genotype that showed the greatest differences for four the different variables among the substrates, being both the most sensitive and the one with the highest values for all parameters measured. The hybrids' vegetative propagation was determined in alternative substrates formulated from poultry manure compost. The physicochemical characteristics of substrates composed of pine bark and sawdust provided adequate conditions for the growth of eucalyptus. GC8 was the genotype most sensitive to the use of different substrates, showing significant differences in the ratio of roots/callus, radicular dry weight, and cutting dry weight. These clones might be a good option for evaluating compost-based substrates for forestry applications.
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7

Silva, Carlos Magno Magalhães da, Lino Roberto Ferreira, Francisco Affonso Ferreira, and Glauco Vieira Miranda. "Imazapyr root exudation from eucalypt seedlings cultivated in nutritive solution." Revista Árvore 29, no. 6 (December 2005): 915–20. http://dx.doi.org/10.1590/s0100-67622005000600010.

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Imazapyr has been used in Brazilian eucalypt cultivation for the maintenance of clearings and coppicing control in areas undergoing stand reform. However, inquiries have been made as to the final fate of the molecule. Imazapyr root exudation in eucalypt plants was evaluated through a bioassay under greenhouse conditions, by applying different herbicide doses (0.000, 0.375, 0.750, 1.125, and 1.500 kg ha-1 a.i.) on Eucalyptus grandis seedlings derived from vegetative propagation, hydroponically cultivated in 2.500 ml vases. Forty-day-old seedlings of the same clone were used as bioindicators, transplanted to the vases two days after herbicide application. After a period of 13 days of coexistence, the sprayed plants were removed and discarded; ten days later, the visual symptoms of toxicity were evaluated and the total dry biomass (aerial part and roots) of the bioindicators were determined. The lowest herbicide dose (0.375 kg ha-1 a.i.) affected the total biomass and growth, being most evident in the aerial part, with larger I50 for root dry biomass. The E. grandis seedlings exuded imazapyr, and/or its metabolites, in concentrations capable of affecting the growth of plants of the same species.
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8

Kobori, Hikaru, Miho Kojima, Hiroyuki Yamamoto, Yasutoshi Sasaki, Fabio Minoru Yamaji, and Satoru Tsuchikawa. "Vis–NIR spectroscopy for the on-site prediction of wood properties." Forestry Chronicle 89, no. 05 (October 2013): 631–38. http://dx.doi.org/10.5558/tfc2013-114.

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We investigated the feasibility of visible–near-infrared (Vis–NIR) spectroscopy for estimation of wood qualities of fast-growing Eucalyptus grandis. Partial least squares regression (PLSR) models are applied to predict the diameter at the breast height (DBH), lateral growth rate (LGR) and propagation velocity of stress waves (PVSW). It was possible to estimate LGR and PVSW with appropriate accuracy. This suggested that perhaps information in terms of maturation is included in Vis–NIR spectra. The key factors in the validation of PVSW and LGR were the water and cellulose condition in wood.
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9

Mankessi, Francois, Rachel Aubin Saya, Mélanie Toto, and Grace Jopaul Loubota Panzou. "Influence of Two Cutting Propagation Systems on Early Field Growth of Four Eucalyptus urophylla × Eucalyptus grandis Clones in the Republic of Congo." OALib 09, no. 12 (2022): 1–12. http://dx.doi.org/10.4236/oalib.1109422.

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10

Hoad, S. P., and R. R. B. Leakey. "Effects of pre-severance light quality on the vegetative propagation of Eucalyptus grandis W. Hill ex Maiden." Trees 10, no. 5 (June 25, 1996): 317–24. http://dx.doi.org/10.1007/pl00009651.

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11

Yang, Jenq-Chuan, Jeng-Der Chung, and Zenn-Zong Chen. "Vegetative propagation of adult Eucalyptus grandis X urophylla and comparison of growth between micropropagated plantlets and rooted cuttings." Plant Cell Reports 15, no. 3-4 (December 1995): 170–73. http://dx.doi.org/10.1007/bf00193713.

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12

Gallo, Ricardo, Aloisio Xavier, Brener de Almeida Oliveira, Luciana Coelho de Moura, Natane Amaral Miranda, Kellen Cristina Gatti, and Wagner Campos Otoni. "Microcutting propagation of Eucalyptus grandis x E. urophylla through clumps of axillary buds using different containers and substrates." Australian Journal of Crop Science 11, no. 10 (October 20, 2017): 1327–33. http://dx.doi.org/10.21475/ajcs.17.11.10.pne607.

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13

Grattapaglia, D., F. L. Bertolucci, and R. R. Sederoff. "Genetic mapping of QTLs controlling vegetative propagation in Eucalyptus grandis and E. urophylla using a pseudo-testcross strategy and RAPD markers." Theoretical and Applied Genetics 90, no. 7-8 (June 1995): 933–47. http://dx.doi.org/10.1007/bf00222906.

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14

Leite, Marcos Vinicius Santana, Christian Dias Cabacinha, and Adriana Leandra Assis. "Classificação da capacidade produtiva com alturas de árvores dominantes estimadas por RNA." Ciência Florestal 32, no. 3 (September 22, 2022): 1552–74. http://dx.doi.org/10.5902/1980509867120.

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A construção de curvas de sítio a partir da modelagem da altura de árvores dominantes medidas em parcelas permanentes em diferentes idades, considerando uma idade de referência, se constitui no método mais prático e difundido no meio florestal para classificar a capacidade produtiva local. Dentro de um processo de Planejamento Florestal, o grau de assertividade das curvas geradas tem consequências quantitativas e qualitativas na alocação de recursos, de forma que a melhoria contínua dos métodos de classificação é de suma importância. Este estudo teve como objetivo propor o uso de modelos de Redes Neurais Artificiais (RNA) para estimar a altura de árvores dominantes de eucalipto, e aplicá-los na geração de curvas de sítio utilizando o método da curva guia, como uma alternativa aos modelos tradicionais de regressão não-linear, avaliando a precisão das estimativas e a estabilidade da classificação da capacidade produtiva local gerada por essas abordagens. Os dados utilizados foram provenientes das medições de 8.819 parcelas permanentes instaladas em povoamentos clonais de Eucalyptus urophylla × Eucalyptus grandis. Foram ajustados cinco modelos não lineares clássicos e as RNA foram treinadas com dois algoritmos: Feed Forward Back Propagation Network (FFBP) e Cascade Forward Back Propagation Network (CFBP). Os resultados mostraram que, de maneira geral, quando utilizada somente a idade das parcelas para estimativa da altura dominante, não houve diferença nos resultados entre as RNA treinadas com os dois algoritmos e os modelos não lineares. Contudo, com adição de novas variáveis do povoamento durante o treinamento das RNA, houve uma melhora nas estimativas das alturas dominantes e gerou uma classificação da capacidade produtiva 13% mais estável se comparada aos modelos de regressão não linear.
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15

Xiao, Yufei, Junji Li, Ye Zhang, Xiaoning Zhang, Hailong Liu, Zihai Qin, and Bowen Chen. "Transcriptome analysis identifies genes involved in the somatic embryogenesis of Eucalyptus." BMC Genomics 21, no. 1 (November 18, 2020). http://dx.doi.org/10.1186/s12864-020-07214-5.

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Abstract Background Eucalyptus, a highly diverse genus of the Myrtaceae family, is the most widely planted hardwood in the world due to its increasing importance for fiber and energy. Somatic embryogenesis (SE) is one large-scale method to provide commercial use of the vegetative propagation of Eucalyptus and dedifferentiation is a key step for plant cells to become meristematic. However, little is known about the molecular changes during the Eucalyptus SE. Results We compared the transcriptome profiles of the differentiated and dedifferentiated tissues of two Eucalyptus species – E. camaldulensis (high embryogenetic potential) and E. grandis x urophylla (low embryogenetic potential). Initially, we identified 18,777 to 20,240 genes in all samples. Compared to the differentiated tissues, we identified 9229 and 8989 differentially expressed genes (DEGs) in the dedifferentiated tissues of E. camaldulensis and E. grandis x urophylla, respectively, and 2687 up-regulated and 2581 down-regulated genes shared. Next, we identified 2003 up-regulated and 1958 down-regulated genes only in E. camaldulensis, including 6 somatic embryogenesis receptor kinase, 17 ethylene, 12 auxin, 83 ribosomal protein, 28 zinc finger protein, 10 heat shock protein, 9 histone, 122 cell wall related and 98 transcription factor genes. Genes from other families like ABA, arabinogalactan protein and late embryogenesis abundant protein were also found to be specifically dysregulated in the dedifferentiation process of E. camaldulensis. Further, we identified 48,447 variants (SNPs and small indels) specific to E. camaldulensis, including 13,434 exonic variants from 4723 genes (e.g., annexin, GN, ARF and AP2-like ethylene-responsive transcription factor). qRT-PCR was used to confirm the gene expression patterns in both E. camaldulensis and E. grandis x urophylla. Conclusions This is the first time to study the somatic embryogenesis of Eucalyptus using transcriptome sequencing. It will improve our understanding of the molecular mechanisms of somatic embryogenesis and dedifferentiation in Eucalyptus. Our results provide a valuable resource for future studies in the field of Eucalyptus and will benefit the Eucalyptus breeding program.
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16

Zhang, Ye, Junji Li, Changrong Li, Shengkan Chen, Qinglan Tang, Yufei Xiao, Lianxiang Zhong, Yingying Chen, and Bowen Chen. "Gene expression programs during callus development in tissue culture of two Eucalyptus species." BMC Plant Biology 22, no. 1 (January 3, 2022). http://dx.doi.org/10.1186/s12870-021-03391-x.

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Abstract Background Eucalyptus is a highly diverse genus of the Myrtaceae family and widely planted in the world for timber and pulp production. Tissue culture induced callus has become a common tool for Eucalyptus breeding, however, our knowledge about the genes related to the callus maturation and shoot regeneration is still poor. Results We set up an experiment to monitor the callus induction and callus development of two Eucalyptus species - E. camaldulensis (high embryogenic potential) and E. grandis x urophylla (low embryogenic potential). Then, we performed transcriptome sequencing for primary callus, mature callus, shoot regeneration stage callus and senescence callus. We identified 707 upregulated and 694 downregulated genes during the maturation process of the two Eucalyptus species and most of them were involved in the signaling pathways like plant hormone and MAPK. Next, we identified 135 and 142 genes that might play important roles during the callus development of E. camaldulensis and E. grandis x urophylla, respectively. Further, we found 15 DEGs shared by these two Eucalyptus species during the callus development, including Eucgr.D00640 (stem-specific protein TSJT1), Eucgr.B00171 (BTB/POZ and TAZ domain-containing protein 1), Eucgr.C00948 (zinc finger CCCH domain-containing protein 20), Eucgr.K01667 (stomatal closure-related actinbinding protein 3), Eucgr.C00663 (glutaredoxin-C10) and Eucgr.C00419 (UPF0481 protein At3g47200). Interestingly, the expression patterns of these genes displayed “N” shape in the samples. Further, we found 51 genes that were dysregulated during the callus development of E. camaldulensis but without changes in E. grandis x urophylla, such as Eucgr.B02127 (GRF1-interacting factor 1), Eucgr.C00947 (transcription factor MYB36), Eucgr.B02752 (laccase-7), Eucgr.B03985 (transcription factor MYB108), Eucgr.D00536 (GDSL esterase/lipase At5g45920) and Eucgr.B02347 (scarecrow-like protein 34). These 51 genes might be associated with the high propagation ability of Eucalyptus and 22 might be induced after the dedifferentiation. Last, we performed WGCNA to identify the co-expressed genes during the callus development of Eucalyptus and qRT-PCR experiment to validate the gene expression patterns. Conclusions This is the first time to globally study the gene profiles during the callus development of Eucalyptus. The results will improve our understanding of gene regulation and molecular mechanisms in the callus maturation and shoot regeneration.
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17

Vilasboa, Johnatan, Cibele Tesser da Costa, Leonardo Girardi Ransan, Jorge Ernesto de Araújo Mariath, and Arthur Germano Fett-Neto. "Microcutting Redox Profile and Anatomy in Eucalyptus spp. With Distinct Adventitious Rooting Competence." Frontiers in Plant Science 11 (January 20, 2021). http://dx.doi.org/10.3389/fpls.2020.620832.

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Adventitious root (AR) development takes place in an intricate cellular environment. Reactive oxygen species (ROS) and antioxidant defenses, triggered by wounding in cuttings, can modulate this process. A comparative assessment of biochemical and anatomical parameters at critical rooting stages in hard- (Eucalyptus globulus Labill.) and easy- (Eucalyptus grandis W.Hill ex Maiden) to-root species was carried out. Microcuttings from seedlings were inoculated in auxin-free AR induction medium and, after 96 h, transferred to AR formation medium for a period of 24 h. Samples were collected upon excision (Texc) and at the 5th day post excision (Tform). Delayed xylem development, with less lignification, was recorded in E. globulus, when compared to E. grandis, suggesting lower activity of the cambium layer, an important site for AR development. Superoxide was more densely present around the vascular cylinder at both sampled times, and in greater quantity in E. globulus than E. grandis, declining with time in the former. Hydrogen peroxide was localized primarily along cell walls, more intensely in the primary xylem and phloem, and increased significantly at Tform in E. globulus. Ascorbate peroxidase (APX), superoxide dismutase (SOD), and catalase (CAT) activities were generally higher in E. grandis and varied as a function of time in E. globulus. Soluble guaiacol peroxidase (GPRX) activity increased from Texc to Tform in both species, whereas cell wall-bound GPRX activity increased with time in E. grandis, surpassing E. globulus. Flavonoid content increased with time in E. grandis and was higher than E. globulus at Tform. Principal component analysis showed that species- and time-derived differences contributed to almost 80% of the variance. Overall, data indicate that E. grandis shows higher cambium activity and tighter modulation of redox conditions than E. globulus. These features may influence ROS-based signaling and phytohormone homeostasis of cuttings, thereby impacting on AR development. Besides being players in the realm of AR developmental differences, the specific features herein identified could become potential tools for early clone selection and AR modulation aiming at improved clonal propagation of this forest crop.
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18

Carrasco, Edgar V. M., Rejane C. Alves, Mônica A. Smits, Vinnicius D. Pizzol, Ana Lucia C. Oliveira, and Judy N. R. Mantilla. "Influence of the applied pressure of the transducer on the propagation speed of the ultrasonic wave in wood." Holzforschung, July 21, 2021. http://dx.doi.org/10.1515/hf-2020-0272.

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Abstract The non-destructive wave propagation technique is used to estimate the wood’s modulus of elasticity. The propagation speed of ultrasonic waves is influenced by some factors, among them: the type of transducer used in the test, the form of coupling and the sensitivity of the transducers. The objective of the study was to evaluate the influence of the contact pressure of the transducers on the ultrasonic speed. Ninety-eight tests were carried out on specimens of the species Eucalyptus grandis, with dimensions of 120 × 120 × 50 mm. The calibration of the pressure exerted by the transducer was controlled by a pressure gauge using a previously calibrated load cell. The robust statistical analysis allowed to validate the experimental results and to obtain consistent conclusions. The results showed that the wave propagation speed is not influenced by the pressure exerted by the transducer.
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19

Picoli, E. A. T., E. A. S. Paiva, A. Xavier, R. M. Aguiar, S. M. B. Carolino, M. G. Fári, and W. C. Otoni. "Ultrastructural and biochemical aspects of normal and hyperhydric eucalypt." International Journal of Horticultural Science 14, no. 3 (May 19, 2008). http://dx.doi.org/10.31421/ijhs/14/3/805.

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Hyperhydricity was observed throughout in vitro multiplication phase of a Eucalyptus grandis clone. Ultrastructural approach of tissue and cell differentiation, izoenzyme patterns, binding protein (BiP) expression, and pigment content were performed. Hyperhydric tissues showed a reduction in cell wall deposition, reduction of membranous organelles, higher cell vacuolation, and more intercellular spaces than its normal counterpart. Additionally, several vesicles were present in hyperhydric cells suggesting the occurrence of organelle autophagy by autophagic vacuole. Lower pigment content, intercellular spaces on the epidermis and the induction of a molecular chaperone (BiP) were observed in hyperhydric phenotype. Evidences of schizolysigenous process of intercellular space formation are compatible with a stress condition. Although plastoglobulli were observed in normal and hyperhydric chloroplasts, they were more evident in the normal ones. Abnormal stomata also reflected a disruptive situation and morphogenesis disturbances which would difficult plant acclimatization. Further observation of the epidermis ultrastructure allows us to conclude that the presence of intercellular spaces on its surface may be constraining the recovery and development of hyperhydric plants. Similarly to BiP, other proteins such as esterase (EST), acid phosphatase (ACP), malate dehydrogenase (MDH) and peroxidase (PDX) are possible to be used as stress markers in in vitro conditions. Our results confirm earlier findings about negative effects of hyperhydricity on in vitro plant morphogenesis and ultrastructure, which in eucalypt is associated with a stressful condition contributing to lower propagation ratios.
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