Supplemental ultraviolet-B induced changes in essential oil composition and total phenolics of Acorus calamus L. (sweet flag)

Kumari, Rima; Agrawal, Shashi Bhushan; Singh, Sarita; Dubey, Nawal Kishore

doi:10.1016/j.ecoenv.2009.02.006

Cited by 66 publications

(30 citation statements)

References 34 publications

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“…One protection mechanism is the altered synthesis of antioxidant substances like essential oils, carotenoids, phenolics, as well as other secondary metabolites. Effects of PAR and UV-B radiation on herbs and other plant species were already reported by some authors (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). UV-B can also essentially influence the growth of herbs (15).…”

Section: Introductionmentioning

confidence: 77%

Effects of PAR and UV‐B Radiation on Herbal Yield, Bioactive Compounds and Their Antioxidant Capacity of Some Medicinal Plants Under Controlled Environmental Conditions

Manukyan

2012

Photochem & Photobiology

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Photosynthetically active radiation (PAR) and Ultraviolet B (UV-B) radiation are among the main environmental factors acting on herbal yield and biosynthesis of bioactive compounds in medicinal plants. The objective of this study was to evaluate the influence of biologically effective UV-B light (280-315 nm) and PAR (400-700 nm) on herbal yield, content and composition, as well as antioxidant capacity of essential oils and polyphenols of lemon catmint (Nepeta cataria L. f. citriodora), lemon balm (Melissa officinalis L.) and sage (Salvia officinalis L.) under controlled greenhouse cultivation. Intensive UV-B radiation (2.5 kJ m(-2) d(-1) ) influenced positively the herbal yield. The essential oil content and composition of studied herbs were mainly affected by PAR and UV-B radiation. In general, additional low-dose UV-B radiation (1 kJ m(-2) d(-1) ) was most effective for biosynthesis of polyphenols in herbs. Analysis of major polyphenolic compounds provided differences in sensitivity of main polyphenols to PAR and UV-B radiation. Essential oils and polyphenol-rich extracts of radiated herbs showed essential differences in antioxidant capacity by the ABTS system. Information from this study can be useful for herbal biomass and secondary metabolite production with superior quality under controlled environment conditions.

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Section: Introductionmentioning

confidence: 77%

Effects of PAR and UV‐B Radiation on Herbal Yield, Bioactive Compounds and Their Antioxidant Capacity of Some Medicinal Plants Under Controlled Environmental Conditions

Manukyan

2012

Photochem & Photobiology

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“…A further benefit of UVB light exposure is an increase in the concentration of essential oils in herbs (Kumari et al. ; Hikosaka et al. ).…”

Section: Overview Of Plant Photoreceptors and Photomorphogenesismentioning

confidence: 99%

“…UVB light exposure has been linked to increased oil and volatile contents in a range of herb species including sweet flag ( Acorus calamus L.; Kumari et al. ), japanese mint ( Metha arvensis L var. piperascens; Hikosaka et al.…”

Section: Secondary Metabolites: Pigmentation Flavor and Aromamentioning

confidence: 99%

Photobiology in protected horticulture

Davis

Burns

2016

Food and Energy Security

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The introduction of high power LED lighting systems for horticulture has stimulated substantial interest from both the research community and the protected horticulture industry. LED lighting systems have the potential to reduce electrical energy consumption compared to conventional high pressure sodium lights and their energy efficiency continues to improve. In addition to the potential of LEDs to reduce carbon footprints and reduce running costs, LED lighting also provides considerable opportunities to exploit the wealth of photobiological knowledge to produce horticultural benefits. The narrow emission spectra of LEDs allows lighting systems to be tightly designed to stimulate specific plant photoreceptors, allowing plants to be manipulated to produce desirable characteristics. Lighting systems can be designed to maximize growth, control morphology, and optimize flavor and pigmentation. This review outlines how the light spectrum influences photosynthesis and how plant photoreceptors sense light and control growth. The review then discusses the ways in which this knowledge is being implemented in commercial horticulture to improve factors such as yield, flavor, color, plant growth, and flowering as well as pest and pathogen management and control. Research in this area is moving rapidly as the LED systems improve and increase in efficiency and as the range of novel horticultural applications expands.

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“…They play an important role in chemoprevention of various diseases [26]. Phenolics and volatile oils in medicinal plants have been identified as the two most important products of secondary metabolites, showing a broad range of applications in pharmaceutical fields including antioxidants, antiplatelets, anti-inflammatory, anti-tumour, anti-viral activities [27][28][29][30]. Natural phenolic compounds display a potential role as chemo-preventive agents.…”

Section: Introductionmentioning

confidence: 99%

Supplemental UV‐B induced changes in leaf morphology, physiology and secondary metabolites of an Indian aromatic plantCymbopogon citratus(D.C.) Staph under natural field conditions

Kumari

Agrawal

2010

International Journal of Environmental Studies

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Cymbopogon citratus (D.C.) Staph, an aromatic perennial herb, is known to have great potential as a medicinal plant. In our study, we investigated in realistic field conditions the effect of supplemental ultraviolet-B (sUV-B) at two levels (+1.8 and +3.6 kJ m −2 d −1 above ambient) on various growth, physiological and biochemical characteristics of C. citratus. A higher dose of sUV-B produced a 17.6% reduction in biomass while at a lower dose the characteristics remained unaffected. The sUV-B imparted its negative effects to chlorophyll contents while an increment was noticed for carotenoids and phenolic compounds. No significant change in the rate of photosynthesis was noticed. The SEM observation revealed dense waxy deposition on the adaxial surface of exposed leaves at a lower dose of sUV-B to increase epidermal transmittance. This study clearly indicated the beneficial effect of sUV-B on volatile oils production in C. citratus plants grown under a low dose of sUV-B.

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Supplemental ultraviolet-B induced changes in essential oil composition and total phenolics of Acorus calamus L. (sweet flag)

Cited by 66 publications

References 34 publications

Effects of PAR and UV‐B Radiation on Herbal Yield, Bioactive Compounds and Their Antioxidant Capacity of Some Medicinal Plants Under Controlled Environmental Conditions

Effects of PAR and UV‐B Radiation on Herbal Yield, Bioactive Compounds and Their Antioxidant Capacity of Some Medicinal Plants Under Controlled Environmental Conditions

Photobiology in protected horticulture

Supplemental UV‐B induced changes in leaf morphology, physiology and secondary metabolites of an Indian aromatic plantCymbopogon citratus(D.C.) Staph under natural field conditions

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