Search results

1

Seasonal changes of violaxanthin cycle pigment de-epoxidation in wintergreen and evergreen plants

100%

Dymova O., Golovko T.

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2012

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vol. 59

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issue 1

143-144

EN

We studied carotenoids composition and the activities of the xanthophylls pigments in evergreen conifers (Abies sibirica, Juniperus communis, Picea obovata) and dwarf-shrub (Vaccinium vitis-idaea), and in wintergreen herbaceous plants (Ajuga reptans, Pyrola rotundifolia) growing near Syktyvkar (61°67/ N 50°77/ E). The carotenoid pool consisted mainly of following xanthophylls: lutein (70%), neoxanthin (7-10%) and a xanthophylls cycle component - violaxanthin (3-15%). Zeaxanthin and antheraxanthin were found in conifer samples collected in December-March while in other species - during all year. A direct connection between xanthophyll pigment de-epoxidation level and light energy thermal dissipation was shown only for boreal conifer species. It is proposed that zeaxanthin plays a central role in the dissipation of excess excitation energy (nonphotochemical quenching) in the antenna of photosystem II (PSII). We conclude that the increase in the extent of de-epoxidation is beneficial for the retention of PSII activity for conifers in early spring and for herbs in summer.

2

Biosynthesis of α- and β-ionone, prominent scent compounds, in flowers of Osmanthus fragrans

100%

Baldermann S., Kato M., Fleischmann P., Watanabe N.

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2012

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vol. 59

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issue 1

79-81

EN

Carotenoid derived volatiles are important fragrance compounds, which contribute to the scents of flowers from diverse taxa. A famous example is represented by the flowers of Osmanthus fragrans where apocarotenoids account for more than 20% of all volatiles. In the recent years, bio-degradation of carotenoids has been shown to be an important route for apocarotenoids formation. Here, we report on the contribution the O. fragrans carotenoid cleavage dioxygenase 1 to the synthesis of the two predominant C13-apocarotenoids, α- and β-ionone, derived from α-and β-carotene, respectively.

3

Variations in xanthophyll composition in etiolated seedlings of Arabidopsis thaliana correlate with protochlorophyllide accumulation

100%

Myśliwa-Kurdziel B., Jemioła-Rzemińska M., Turek E., Strzałka K., Malec P.

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2012

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vol. 59

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issue 1

57-60

EN

Protochlorophyllide (Pchlide) accumulation and xantophyll composition were studied in 5-day old etiolated seedlings of three ecotypes of Arabidopsis thaliana: Columbia (Col-0), Landsberg erecta (Ler) and Wassiliewska (Ws). The total Pchlide level as measured by fluorescence spectroscopy varied significantly between ecotypes. A rapid HPLC method revealed quantitative differences in carotenoid composition. It was found that in the Ler ecotype any enhanced accumulation of Pchlide correlates with an increased level of lutein, suggesting the role of enzymes involved in lutein synthesis in cross-regulation between chlorophyll and carotenoid biosynthetic pathways. The function of the dark-accumulated carotenoid pool in seedling de-etiolation is discussed.

4

Northern berries as a source of carotenoids

100%

Lashmanova K. A., Kuzivanova O. A., Dymova O. V.

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2012

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vol. 59

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issue 1

133-134

EN

Carotenoids are bioactive substances in human diet. The aim of the study was to determine β-carotene and xanthophylls in four berries species. An HPLC gradient elution system were used for separation and quantification of the carotenoids. The highest total carotenoid content among the berries studied was found in cloudberry (2840 μg/100g dw), followed by blueberry (2140 μg/100 g). All berries had lutein but it was a predominant carotenoid in blueberry. The highest β-carotene levels were found in cloudberry (83% of total Car content). Cranberry and cowberry were the poorest sources of carotenoids. Our data will be included in the regional database of resources with the increased nutritional value.

5

The role of balanced supplementation in diet of age-related macular degeneration patients

100%

Kusz vel Sobczuk I., Święch A.

OphthaTherapy

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2021

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vol. 8

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issue 1

19-25

EN

Aim: The aim of the article was to discuss the role of balanced supplementation in diet of age-related macular degeneration patients. Methods: This review was carried out using comprehensive and systematic literature reports on the role of supplementation of vitamin D, vitamin C, vitamin E, vitamin B6, vitamin B12, zinc, lutein, zeaxanthin, omega-3 acid and folic acid in the prevention of AMD. Results: Vitamins, minerals and carotenoids are essential for the proper retinal function over an inflammation and immune response modulation. Conclusions: Vitamins, minerals and carotenoids discussed in the article have anti-inflammatory and antioxidative properties in the management of AMD progression. Accordingly, it is relevant to assure the appropriate level of these nutrients in a diet of AMD patients.

PL

Cel: Celem pracy było omówienie roli zbilansowanej suplementacji w diecie chorych ze zwyrodnieniem plamki związanym z wiekiem (AMD, age-related macular degeneration). Metody: Dokonano przeglądu piśmiennictwa z ostatnich lat dotyczącego roli witamin: D, C, E, B6, B12, cynku, luteiny, zeaksantyny, kwasu omega-3 oraz kwasu foliowego w prewencji AMD. Wyniki: Witaminy, składniki mineralne i karotenoidy są niezbędne do prawidłowego funkcjonowania siatkówki, ponieważ modulują odpowiedź zapalną i immunologiczną. Wnioski: Omówione w pracy witaminy, minerały oraz karotenoidy mają właściwości przeciwzapalne oraz przeciwutleniające, dzięki czemu zmniejszają ryzyko progresji AMD. W związku z powyższym należy zapewnić właściwe stężenie tych substancji w diecie pacjentów z AMD.

6

Studies on stability of emulsions containing carotenoids

100%

Igielska-Kalwat J.

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2018

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vol. 65

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issue 3

455-463

EN

Emulsions are commonly used to improve aesthetics but they may also be applied to deliver active ingredients. Recently, a group of pigments known as carotenoids has been added to emulsions as an active compound mainly due to their antioxidant properties. The stability of these formulations is a critical parameter for both, pharmaceutical and cosmetics industry. Therefore, in this study two analytical methods, multiple light scattering and laser diffraction, were tested to determine the stability of various emulsions containing carotenoids (β-carotene, lycopene, astaxanthin). Even small changes in stability of emulsions were determined very early. The results of both methods proved that the type of carotenoid used did not influence the emulsions' stability. The stability of emulsions depends mainly on the preparation methods and on the type of emulsifier applied.

7

Qualitative analysis of carotenoids in particular parts of body of males and females of Euphausia suprerb a Dana (Crustacea)

100%

Czerpak R., Jackowska H., Mical A., Czerpak R., Jackowska H., Mical A.

Polish Polar Research

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1980

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vol. 1

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issue 2-3

8

Antioxidant capacity of crude extracts containing carotenoids from the berries of various cultivars of Sea buckthorn (Hippophae rhamnoides L.)

88%

Kruczek M., Świderski A., Mech-Nowak A., Król K.

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2012

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vol. 59

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issue 1

135-137

EN

Comparative analysis of antioxidant capacity was performed using FRAP and DPPH methods on extracts containing carotenoids acquired from fruits of Sea buckthorn. The examination included nine varieties of Sea buckthorn growing in the comparative cultivation. Conducted analysis allowed to compare the antioxidant capacity with carotenoids content measured with spectrophotometric and HPLC methods. Three of the examined cultivars indicating high antioxidant activity in both, FRAP and DPPH methods, also revealed highest ('Aromatnaya') and high ('Botanicheskaya', 'Arumnyj') total carotenoids content in HPLC analysis.

9

Photoprotection by carotenoids of plantago media photosynthetic apparatus in natural conditions

88%

Golovko T., Dymova O., Zakhozhiy I., Dalke I., Tabalenkova G.

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2012

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vol. 59

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issue 1

145-147

EN

The study of daily changes in photosynthetic rate, of energy used in photochemical and non-photochemical processes, and of carotenoid composition aimed at evaluating the role of xanthophyll cycle (XC) in protection of hoary plantain plants (Plantago media) in nature. The leaves of sun plants differed from shade plants in terms of CO2 exchange rate and photosynthetic pigments content. The total pool XC pigments and the conversion state increased from morning to midday in sun plants. An increase in zeaxanthin content occurred concomitantly with the violaxanthin decrease. About 80% violaxanthin was involved in conversion. The maximum of zeaxanthin in XC pigments pool was 60%. The conversion state of XC was twice as lower in shade plants than that in sun plants. The photosynthesis of sun leaves was depressed strongly at midday, but changes of maximum quantum yield of PS2 (Fv/Fm) were not apparent at that time. The coefficient qN (non-photochemical quenching) in the sun leaves changed strongly, from 0.3 to 0.9 as irradiance increased. The direct relation between heat dissipation and the conversion state of XC in plantain leaves was revealed. Thus, plantain leaves were found to be resistant to excess solar radiation due to activation of qN mechanisms associated with the XC de-epoxidation.

10

Carotenoid composition of Caloplaca reqalis (Vain.) Zahlbr. (Lichenes) and of penguin faeces at King George Island (Antarctica)

88%

Filho L. X., Kołakowska A., Vincente C., Filho L. X., Kołakowska A., Vincente C.

Polish Polar Research

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1986

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vol. 7

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issue 3

11

Carotenoid composition and in vitro pharmacological activity of rose hips

75%

Horváth G., Molnár P., Radó-Turcsi E., Deli J., Kawase M., Satoh K., Tanaka T., Tani S., Sakagami H., Gyémánt N., Molnár J.

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2012

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vol. 59

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issue 1

129-132

EN

The aim of the present study was to compare carotenoid extracts of Rose hips (Rosa canina L.) with regard to their phytochemical profiles and their in vitro anti-Helicobacter pylori (H. pylori), cytotoxic, multidrug resistance (MDR) reversal and radical scavenging activity. Carotenoid composition was investigated in the different fractionation of rose hips, using extraction methods. Six main carotenoids - epimers of neochrome, lutein, zeaxanthin, rubixanthin, lycopene, β,β-carotene - were identified from Rose hips by their chromatographic behavior and UV-visible spectra, which is in accordance with other studies on carotenoids in this plant material. The active principles in the carotenoid extract might differ, depending upon the extraction procedures.

12

Effect of UV-B radiations on the pigments of two Antarctic lichens of Schirmacher Oasis, East Antarctica

75%

Gautam S., Singh J., Pant A. B.

Polish Polar Research

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2011

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issue 3

13

Studies on the carotenoids of the Embryophyta. VII. Representatives of the families Gramineae and Caryophyllaceae from King George Island (South Shetland Islands)

75%

Czeczuga B., Gutkowski R., Czerpak R., Czeczuga B., Gutkowski R., Czerpak R.

Polish Polar Research

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1984

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vol. 5

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issue 1-2

14

Superlative carotenoids

63%

Sliwka H.-R., Partali V.

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2012

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vol. 59

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issue 1

17-20

EN

A selection of carotenoids beyond normal appearance or properties has been presented at the 16th International Symposium on Carotenoids. Some of the exceptional compounds shown at the conference cannot be reproduced in this proceeding since they have not yet been published. In addition, editorial space limitation does not allow illustrating all of the previously mentioned carotenoids.

Refine search results

Seasonal changes of violaxanthin cycle pigment de-epoxidation in wintergreen and evergreen plants

Biosynthesis of α- and β-ionone, prominent scent compounds, in flowers of Osmanthus fragrans

Variations in xanthophyll composition in etiolated seedlings of Arabidopsis thaliana correlate with protochlorophyllide accumulation

Northern berries as a source of carotenoids

The role of balanced supplementation in diet of age-related macular degeneration patients

Studies on stability of emulsions containing carotenoids

Qualitative analysis of carotenoids in particular parts of body of males and females of Euphausia suprerb a Dana (Crustacea)

Antioxidant capacity of crude extracts containing carotenoids from the berries of various cultivars of Sea buckthorn (Hippophae rhamnoides L.)

Photoprotection by carotenoids of plantago media photosynthetic apparatus in natural conditions

Carotenoid composition of Caloplaca reqalis (Vain.) Zahlbr. (Lichenes) and of penguin faeces at King George Island (Antarctica)

Carotenoid composition and in vitro pharmacological activity of rose hips

Effect of UV-B radiations on the pigments of two Antarctic lichens of Schirmacher Oasis, East Antarctica

Studies on the carotenoids of the Embryophyta. VII. Representatives of the families Gramineae and Caryophyllaceae from King George Island (South Shetland Islands)

Superlative carotenoids