Seasonal Influence on the Essential Oil <i>of Eucalyptus microcorys</i>

Oliveira, Flávia Neri Meira de; Fortes, Gilmara Aparecida Corrêa; Paula, José Realino de; Ferri, Pedro Henrique; Santos, Suzana C.

doi:10.1177/1934578x1400900439

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…Os pesquisadores analisaram a composição química do óleo essencial, os compostos fenólicos e nutrientes das folhas da planta cultivada no Brasil. Os resultados obtidos comprovaram a quimiovariabilidade do óleo influenciada pelos fatores climáticos [20] .…”

Section: Eucaliptounclassified

Potencial econômico e terapêutico dos óleos essenciais mais utilizados no Brasil

Bieski¹,

Santos

Ferreira

et al. 2022

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Óleos essenciais são extratos aromáticos altamente concentrados e voláteis obtidos através de plantas. O presente trabalho buscou otimizar informações sobre o potencial econômico e terapêutico de tais produtos no Brasil. Através da revisão da literatura e atualização dos dados comerciais existentes, foi possível identificar estudos científicos relevantes que foram selecionados em buscas nas bases de dados eletrônicas National Library of Medicine (PubMed), Scientific Eletronic Library Online (SciElo), Google Scholar, The Cochrane Library, de acordo com o grau de adequação ao tema proposto. Sendo o país um dos grandes produtores desse tipo de insumo, suas exportações e importações são responsáveis por movimentar milhões de dólares. Percebendo sua importância, tanto para a saúde quanto para a economia brasileira, destacam-se as espécies mais estudadas no país a fim de se obter tais extratos: Citrus limon (L.) Burm.f.; Eucalyptus citriodora Hook; Eucalyptus urograndis; Eucalyptus microcoris; Mentha arvensis L.; Mentha piperita L.; Cedrus atlantica (Endl.) Manetti ex Carrière; Cymbopogon winterianus Jowitt ex Bor; Cymbopogon citratus (DC.) Stapf; Myrocarpus frondosus Allemão; Citrus sinensis (L.) Osbeck; Citrus bergamia Risso; Pelargonium graveolens L’Hér. Os resultados obtidos demonstram que a produção de óleos essenciais no país é viável e de grande potencial econômico e terapêutico.

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Section: Eucaliptounclassified

Potencial econômico e terapêutico dos óleos essenciais mais utilizados no Brasil

Bieski¹,

Santos

Ferreira

et al. 2022

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“…Despite its potential commercial applications, E. microcorys has not been established commercially nor it has been studied as often as other Eucalyptus species. Moreover, existing studies on E. microcorys are mainly limited to its adaptation and wood utilization aspects (Oliveira et al 2014;Teixeira et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of total protein, peroxidase, and nutrients measured by pXRF for the determination of tissue rejuvenation/reinvigoration of Eucalyptus microcorys

et al. 2023

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Ontogenetic aging of tissues and the gradual decrease of adventitious rooting are known challenges for the clonal propagation of woody species, hampering clonal forestry programs. This study examined possible signatures of tissue rejuvenation/reinvigoration in different propagated materials of Eucalyptus microcorys by analyzing the total protein profile, peroxidase activity, macro- and micronutrient contents, and adventitious rooting of mini cuttings. The analyses were performed on E. microcorys shoots which were successfully obtained by seminal and grafting propagation, micropropagation with epicormic shoots, and indirect organogenesis. Among four mature trees used in the propagation, tissues from the one with the best propagation results were investigated for signs of tissue rejuvenation and/or reinvigoration. Five individuals from each technique were randomly selected and transferred to a semi-hydroponic “channel” system. After four weeks in the seedbed, the total protein, peroxidase activity, nutrient content and rooting of the mini cuttings were evaluated. SDS-PAGE enabled the differentiation of leaf samples obtained by grafting from the other propagation techniques, as revealed by two distinct bands. Materials obtained by micropropagation with epicormic shoots showed the highest peroxidase activity, while those obtained by seminal propagation and from the selected mature tree showed the lowest peroxidase activity. A portable X-ray fluorescence spectroscope (pXRF) identified adequate nutrient content in most of the nutrients tested in materials obtained by seminal and grafting propagation, and by indirect organogenesis. The analysis of adventitious rooting showed that the highest rooting percentage was observed in mini cuttings from seminal propagation (75%) followed by indirect organogenesis (35%). Based on principal component analysis, it was concluded that rooting of mini cuttings from both seminal propagation and indirect organogenesis was associated with phosphorous, sulphur, and potassium contents, which suggests a higher level of tissue rejuvenation/reinvigoration in these propagated plants. Further studies are recommended to search for other methods that present similarities with the responses to adventitious rooting in forest species and thus optimize the rescue and propagation of plants with distinct ontogenetic stages.

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“…Eucalyptus is used as raw material for the production of paper, cellulose, and other derivatives that represent 4% of Brazil's GDP and 8% of all Brazilian exports (Jonker et al 2015). Although Eucalyptus grandis Hill ex Maiden is the most planted species in Brazil, E. microcorys F. Muell is also widely cultivated in the country, due to its feasible chemical and physical properties for the production of charcoal (Oliveira et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Diversity of endophytic fungi in Eucalyptus microcorys assessed by complementary isolation methods

2018

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Brazil is the world's largest producer country of eucalyptus. Although widely applied in the charcoal industry, no studies have focused on the microorganisms associated with Eucalyptus microcorys. Here, we evaluated the composition and structure of endophytic fungal communities in leaves of E. microcorys through two isolation techniques. A total of 120 fresh leaves were collected in a year-long survey at an eucalyptus plantation in the State of São Paulo (Brazil). Endophytic fungi were isolated by particle filtration (PF) and direct leaf fragment plating (LP) in two media: modified dicloran and synthetic nutrient agar, both supplemented with rose bengal and chloramphenicol. The isolates were grouped into morphospecies and identified by morphology and DNA sequencing. We recovered a total of 709 isolates, representing 59 taxa. All taxa found are reported as endophytic for the first time for E. microcorys. Castanediella eucalypticola and Neophaeomoniella eucalypti are new occurrences reported for Brazil. The LP technique recovered a higher number of taxa and isolates than the PF. However, the PF technique retrieved a higher species/isolate ratio than the LP method, 0.12 and 0.09, respectively. Fungal diversity assessed by diversity metrics did not significantly differ between isolation methods. Both techniques recovered a high number of unique taxa, demonstrating that neither method would individually represent the species richness from E. microcorys. The use of LP and PF provided a greater number of observed taxa and consequently new occurrence of species for Brazil.

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Seasonal Influence on the Essential Oil of Eucalyptus microcorys

Cited by 6 publications

References 26 publications

Potencial econômico e terapêutico dos óleos essenciais mais utilizados no Brasil

Potencial econômico e terapêutico dos óleos essenciais mais utilizados no Brasil

Evaluation of total protein, peroxidase, and nutrients measured by pXRF for the determination of tissue rejuvenation/reinvigoration of Eucalyptus microcorys

Diversity of endophytic fungi in Eucalyptus microcorys assessed by complementary isolation methods

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