Light intensity on growth, leaf micromorphology and essential oil production of Ocimum gratissimum

Fernandes, Valéria Ferreira; Almeida, Laís Bentes de; Feijó, Emily V.R. da S.; Silva, Delmira da C.; Oliveira, Rosilene Aparecida de; Mielke, Marcelo Schramm; Costa, Larissa Corrêa do Bomfim

doi:10.1590/s0102-695x2013005000041

Cited by 52 publications

(43 citation statements)

References 18 publications

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“…Hibbard cultured in a greenhouse [35]. Ocimum gratissimum L. cultured in a herbarium showed a linear increase in shoot biomass production with increased light intensities, and a simultaneous reduction in plant height with intensities higher than 10 µmol m −2 s −1 [36]. The shoot proliferation rate also increased for Castanea sativa Mill.…”

Section: Light Intensitymentioning

confidence: 97%

“…Our research did not show the effect of light intensity on the number of leaves on gerbera shoots, but light intensity affected some leaf parameters. Leaves show high phenotypic plasticity as a result of changes in light intensity [36,47]. During plant development, leaves perform critical and sensitive roles and acclimatize to various stresses as a response to environmental conditions, and these changes are easier to observe than those in stems or roots [48,49].…”

Section: Light Intensitymentioning

confidence: 99%

“…Moreover, plants have different light intensity requirements under artificial lighting than under natural light [51]. High-intensity light in greenhouse cultivations can increase the number of leaves, but an excessively high intensity reduces their number and their area [36,52]. A larger leaf area increases the photosynthetic surface and improves light absorption by the plant at low light intensities [53].…”

Section: Light Intensitymentioning

confidence: 99%

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Different LED Light Intensities and 6-Benzyladenine Concentrations in Relation to Shoot Development, Leaf Architecture, and Photosynthetic Pigments of Gerbera jamesonii Bolus In Vitro

Cioć

Kalisz

Żupnik³

et al. 2019

Agronomy

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A mixture of red and blue light-emitting diodes (LEDs; at a ratio of 7:3, respectively) were used to analyze the effects of different photosynthetic photon flux densities (PPFDs) (40, 80, and 120 µmol m−2 s−1 hereafter known as LED 40, 80, and 120, respectively) on the micropropagation of Gerbera jamesonii Bolus shoots. The experiment also examined the effect of 6-benzyladenine (BA) in 1, 2.5, and 5 µM concentrations in the media. Biometrical observations and analyses of leaf morphometry and photosynthetic pigment content were conducted. Shoot multiplication increased with an increasing BA concentration. A PPFD of 80 µmol m−2 s−1 and 5 µM BA is suggested as efficient for shoot propagation and economically viable. LED 120 increased the leaf blade area and its width, and circularity and elongation ratios. The intensity of light did not affect the fresh weight, which increased at higher BA concentrations (2.5 and 5 μM). The dry weight content decreased with increasing cytokinin concentration; the greatest content was observed on media with 1 µM BA under PPFD 120 µmol m−2 s−1. LED 80 increased the photosynthetic pigments content in the leaves in comparison to the standard intensity of LED 40. Increased BA concentration raises the content of chlorophyll a.

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Section: Light Intensitymentioning

confidence: 97%

Section: Light Intensitymentioning

confidence: 99%

Section: Light Intensitymentioning

confidence: 99%

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Different LED Light Intensities and 6-Benzyladenine Concentrations in Relation to Shoot Development, Leaf Architecture, and Photosynthetic Pigments of Gerbera jamesonii Bolus In Vitro

Cioć

Kalisz

Żupnik³

et al. 2019

Agronomy

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“…Accumulation of essential oils in plants can be mediated, in part, by light intensity and quality, as seen in basil (Chang et al, 2008;Fernandes et al, 2013;Hammock, 2018), by air quality (Blande et al, 2014), and natural variation across species (Rehman et al, 2016). For example, Hammock (2018) reports that at B:R LED ratios in supplemental lighting of 40:60 results in higher limonene and linalool compared with basil grown under HPS lighting.…”

Section: Discussionmentioning

confidence: 99%

“…It is thus possible to promote these signaling pathways through targeted supplemental lighting with specific spectra such as with ultraviolet or B light. While some research has been conducted on the growth (Fraszczak et al, 2014) and essential oil accumulation (Chang et al, 2008;Fernandes et al, 2013;Hammock, 2018) for basil, there is currently little to no literature comprehensively quantifying the effects of LED light quality compared with HPS lighting for both the growth and physiological responses in gas exchange and P n as support for aroma and flavor accumulation. Furthermore, even less literature exists on light quality effects for any combination of these parameters for either parsley or dill.…”

mentioning

confidence: 99%

Effects of Supplemental Light Source on Basil, Dill, and Parsley Growth, Morphology, Aroma, and Flavor

Litvin¹,

Currey²,

Wilson³

2020

J. Amer. Soc. Hort. Sci.

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Broad-spectrum high-pressure sodium (HPS) lamps are the standard for greenhouse supplemental lighting. However, narrow-spectra light-emitting diodes (LEDs) offer potential benefits for enhancing growth, photosynthesis (Pn), and secondary metabolites in culinary herbs. Our objective was to quantify the effect of supplemental light source and spectra on growth, gas exchange, aroma, and flavor of culinary herbs. Basil (Ocimum basilicum ‘Nufar’), dill (Anethum graveolens ‘Fernleaf’), and parsley (Petroselinum crispum ‘Giant of Italy’) were transplanted into hydroponic systems in a glass-glazed greenhouse. Plants were provided with a supplemental photosynthetic photon flux (PPF) density of 100 μmol·m−2·s–1 from an HPS lamp or LEDs with a low blue (B) to red (R) light ratio of 7:93 [low blue (LB)] or high B:R at 30:70 [high blue (HB)]. Compared with plants grown under HPS lamps, basil grown under LB and HB LED lighting was shorter, while only HB-grown parsley was shorter; height of dill was unaffected by light source. Basil and parsley shoot fresh weight was lower for HB-treated plants compared with HPS, though dill was unaffected by supplemental light source. Shoot dry mass of basil, dill, and parsley was unaffected by light source. Both LED treatments increased Pn for basil and parsley compared with HPS-grown plants. Stomatal conductance (gS) was higher under LB and HB for basil compared with HPS in the morning and evening, but only HB-treated parsley was higher than HPS lighting in morning. Basil grown under LB, and parsley under both LEDs had lower chlorophyll fluorescence than those under HPS by the evening, but all three species had more chlorophyll b under LB light than HPS. Essential oil and phenolic accumulation were influenced by supplemental light treatment and responses varied among species. Lighting from LEDs resulted in a 2-fold increase in orientin and myristicin for basil and dill, respectively, while HB increased dillapiole concentration by 89% compared with HPS-grown dill. Notably, quercetin concentration was 2.8 times higher in dill grown under HB compared with HPS. Myrcene increased in all three species under either one (basil HB; dill LB) or both (parsley) LED lights compared with HPS. The increased content of aromatic and flavor compounds demonstrates the potential of supplemental lighting systems using specific wavelengths to add value; but the use of supplemental lighting requires an understanding of the additional stress on the photosynthetic mechanisms and the subsequent effect on biomass accumulation.

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Strategies for Optimization of the Production of Rosmarinic Acid in Salvia officinalis L. and Salvia dolomitica Codd Biomass with Several Biotechnological Approaches

Savona

Barberini

Bassolino³

et al. 2017

Salvia Biotechnology

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Light intensity on growth, leaf micromorphology and essential oil production of Ocimum gratissimum

Cited by 52 publications

References 18 publications

Different LED Light Intensities and 6-Benzyladenine Concentrations in Relation to Shoot Development, Leaf Architecture, and Photosynthetic Pigments of Gerbera jamesonii Bolus In Vitro

Different LED Light Intensities and 6-Benzyladenine Concentrations in Relation to Shoot Development, Leaf Architecture, and Photosynthetic Pigments of Gerbera jamesonii Bolus In Vitro

Effects of Supplemental Light Source on Basil, Dill, and Parsley Growth, Morphology, Aroma, and Flavor

Strategies for Optimization of the Production of Rosmarinic Acid in Salvia officinalis L. and Salvia dolomitica Codd Biomass with Several Biotechnological Approaches

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