Controle de plantas invasoras em cultivo orgânico e convencional de capim-limão (Cymbopogon citratus (DC) Stapf.)

Lemos, G.C.S.; Santos, Antonio; Freitas, S. P.; Gravina, G.A.

doi:10.1590/s1516-05722013000300014

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…High levels of citral and geranial are economically important to the aroma and perfume industries (Barbosa et al, 2008). Moreover, the synthesis of ionone and vitamin A is also accomplished with citral (Lemos et al, 2013).…”

Section: Chemical Identification Of Essential Oilmentioning

confidence: 99%

Essential oil content and chemical composition of Cymbopogon citratus inoculated with arbuscular mycorrhizal fungi under different levels of lead

Lermen

Morelli

Gazim

et al. 2015

Industrial Crops and Products

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Section: Chemical Identification Of Essential Oilmentioning

confidence: 99%

Essential oil content and chemical composition of Cymbopogon citratus inoculated with arbuscular mycorrhizal fungi under different levels of lead

Lermen

Morelli

Gazim

et al. 2015

Industrial Crops and Products

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“…According to the authors, the smaller spacing promoted smaller area per plant, resulting in higher plant height, with a consequent increase in biomass, thus reflecting higher production of essential oil. According to Lemos et al (2013), the presence of mulch in the growing area increases the thermal and water stability of the soil, favoring also the growth in height of the plants, resulting in an increase of the leaf area.…”

Section: Resultsmentioning

confidence: 99%

Growing of tropical black sage and chemical composition of the essential oil

et al. 2017

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A B S T R A C TThe objective of this study was to evaluate the influence of spacing and mulch on biomass production, chemical composition and production of essential oil of tropical black sage. A randomized block design was used in a 2×2 factorial scheme: two spacings (1.6 × 0.5 m and 1.0 × 0.5 m), with and without mulch, using five replications. In the end, the combination of spacing and presence and absence of mulch did not influence the height and diameter of the stem. However, it has influenced fresh matter: 8765.00 kg ha-1 (1.0 × 0.5 m, with mulch) and 6112.50 kg ha-1 (1.6 × 0.5 m, without mulch). The spacing 1.0 x 0.5 m was what provided higher dry matter (3052.14 kg ha-1). For the production of essential oil, the combination of spacing of 1.0 × 0.5 m, with mulch provided greater production (484.50 kg ha-1). Twenty-seven compounds were detected, of which 23 were identified, most of which were sesquiterpenes and monoterpenes. The α-pinene and the β-caryophyllene showed higher abundances in all samples, regardless of the treatment. The contents of α-humulene was sufficient to meet the requirements of the pharmaceutical industry. Thus, the alteration in soil spacing and mulch influences the production of essential oil and biomass, but it does not influence the relatives amount of the α-humulene and of the β-caryophyllene. Keywords:Varronia curassavica Jacq., α-humulene, β-caryophyllene, mulch, spacing. R E S U M OO objetivo deste estudo foi avaliar a influência do espaçamento e da cobertura morta sobre a produção da biomassa, composição química e produção do óleo essencial de erva-baleeira. Utilizou-se o delineamento de blocos casualizados, em esquema fatorial 2×2: dois espaçamentos (1.6 × 0.5 m e 1.0 × 0.5 m), com e sem cobertura morta, sendo utilizadas cinco repetições. Ao final, a combinação entre espaçamento e presença e ausência de cobertura não influenciaram na altura e diâmetro do caule. No entanto, influenciou na matéria fresca: 8765.00 kg ha-1 (1.0 × 0.5 m, com cobertura) e 6112.50 kg ha-1 (1.6 × 0.5 m, sem cobertura). O espaçamento 1.0 × 0.5 m foi o que proporcionou maior matéria seca (3052.14 kg ha-1). Para a produção de óleo essencial, a combinação do espaçamento de 1.0 × 0.5 m, com cobertura proporcionou maior produção (484.50 kg ha-1). Foram detectados 27 compostos dos quais 23 foram identificados, sendo a maior parte sesquiterpenos e monoterpenos. O α-pineno e o β-cariofileno apresentaram maiores abundâncias em todas as amostras, independente do tratamento. Em todos os tratamentos, o teor de α-humuleno foi suficiente para atender às exigências da indústria farmacêutica. Assim a alteração no espaçamento e na cobertura do solo influencia na produção do óleo essencial, e da biomassa, porém não influencia nos teores do α-humuleno e do β-cariofileno. Palavras-chave:Varronia curassavica Jacq., α-humuleno, β-cariofileno, cobertura vegetal, espaçamento.

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“…Red Torch for increasing concentrations of auxin, culminating in a rate of 9.82 shoots/explant at 90 days of growth in a culture medium containing 3.0 mg L -1 BAP and the addition of 1.0 mg L -1 NAA. The fact there was an increase in the number of shoots for increases in the concentration of auxin, shows the importance of establishing the proper ratio of auxin to cytokinin that appears to be beneficial to shoot production in the explant (LEMOS, 2010). …”

Section: Resultsmentioning

confidence: 99%

“…Variations in the composition of growth regulators have been widely tested due to species and type of explant responding differently to the conditions of in vitro cultivation (LEMOS, 2010). Marulanda-Ángel et al (2011) tested six combinations of 6-benzylaminopurine (BAP) in the in vitro cultivation of Heliconia bihai (L.) cv.…”

Section: Introductionmentioning

confidence: 99%

Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimento

Rodrigues

Santos

Carvalho

2016

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Considering the growing economic importance of tropical flowers and the advantages of techniques applied to the in vitro cultivation of these plants, it is necessary to carry out studies to evaluate growth in species such as Heliconia latispatha. The aim of this study therefore, was to evaluate in vitro shoot induction for different concentrations of BAP and NAA and as a function of the photoperiod. Explants from zygotic embryos were inoculated in MS medium containing different concentrations of BAP (0.0, 0.5, 1.0, 1.5, 2.0 or 2.5 mg L -1 ), with the cultures kept in a growth room at a temperature of 24.0 ± 2.0° C, under a photoperiod of 12 and 16 hours of light and a light intensity of 30 μmol m -2 s -1 . At 21, 28, 35, 42 and 49 days after inoculation, the number of shoots per explant was evaluated. The treatment at the BAP concentration that gave the best multiplication rate (2.5 mg L -1 ) was set, and was tested in a further trial with different concentrations of NAA (0.0, 0.2, 0.4, 0 6, 0.8 or 1.0 mg L -1 ) under the same conditions as the previous experiment. The experimental designs were completely randomised, with five replications, and analysed in a 6 x 2 factorial. The data were submitted to analysis of variance and regression. No significant differences were seen in relation to the photoperiod or its interaction with the cytokinin and auxin under test. Multiplication was greater in the presence of 2.5 mg L -1 BAP, which gave a rate of 1.25 shoots/explant at 49 days of in vitro culture. The association of this BAP dosage with 1.0 mg L -1 NAA was even more efficient, producing 1.83 shoots per explant at 30 days of growth. The use of BAP together with NAA is beneficial to the induction of shoots in H. latispatha. Keywords: Heliconiaceae, 6-benzylaminopurine, naphthaleneacetic acid, tissue culture. RESUMO Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimentoConsiderando a crescente importância econômica das flores tropicais e as vantagens das técnicas aplicadas ao cultivo in vitro para estas plantas, torna-se necessária a realização de estudos que avaliem a propagação de espécies como a Heliconia latispatha. Diante do exposto, o objetivo do trabalho foi avaliar a indução de brotações in vitro em função de diferentes concentrações de BAP e ANA em função de fotoperíodos. Os explantes, oriundos de embriões zigóticos, foram inoculados em meio MS contendo diferentes concentrações de BAP (0,0; 0,5; 1,0; 1,5; 2,0 ou 2,5 mg L -1 ), mantendo-se as culturas em sala de crescimento com temperatura de 24,0 ± 2,0 ºC sob fotoperíodo de 12 e 16 horas de luz e intensidade luminosa de 30 μmol m -2 s -1 . Aos 21, 28, 35, 42 e 49 dias após a inoculação, foi avaliado o número de brotos obtidos por explante. O tratamento com a concentração de BAP que proporcionou melhor taxa de multiplicação (2,5 mg L -1 ) foi fixado e, em outro ensaio foi testado com diferentes concentrações de ANA (0,0; 0,2; 0,4; 0,6; 0,8 ou 1,0 mg L -1 ) nas mesmas condições do experimento ...

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Controle de plantas invasoras em cultivo orgânico e convencional de capim-limão (Cymbopogon citratus (DC) Stapf.)

Cited by 7 publications

References 16 publications

Essential oil content and chemical composition of Cymbopogon citratus inoculated with arbuscular mycorrhizal fungi under different levels of lead

Essential oil content and chemical composition of Cymbopogon citratus inoculated with arbuscular mycorrhizal fungi under different levels of lead

Growing of tropical black sage and chemical composition of the essential oil

Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimento

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