Characterisation and variation of antioxidant micronutrients in lettuce (<i>Lactuca sativa</i> folium)

Nicolle, Catherine; Carnat, A.; Fraisse, Didier; Lamaison, Jean‐Louis; Rock, Edmond; Hervé, Michel; Amouroux, Pierre; Rémésy, Christian

doi:10.1002/jsfa.1916

Cited by 175 publications

(174 citation statements)

References 36 publications

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“…4). According to Nicolle et al (2004), 5-CQA and DCTA constituted up to 0.61% DW and 1.12% DW of L. sativa aerial parts, respectively. Contribution of DCTA alone to the total antioxidant power (measured as DPPH scavenging activity) of hydroalcoholic extracts from different cultivars of lettuce reached nearly 70%.…”

Section: Resultsmentioning

confidence: 99%

Caffeic acid derivatives from a hairy root culture of Lactuca virosa

et al. 2011

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In a search for biologically active phenolics, a hydroalcoholic extract from the hairy roots of Lactuca virosa was fractionated by chromatographical methods. The procedure led to the isolation of a substantial amount of 3,5-dicaffeoylquinic acid (3,5-DCQA)-a potent free radical scavenger. An analytical RP-HPLC separation of the hydroalcoholic extract from the hairy roots allowed identification of further hydroxycinnamates: caftaric acid (CTA), chlorogenic acid (5-CQA) and cichoric acid (DCTA), as well as small amounts of unbound phenolic acids. A time course of growth and caffeic acid derivatives accumulation in the hairy root culture was also investigated. The highest contents of the compounds in the examined roots were detected at the logarithmic phase of growth. The average content of 3,5-DCQA in the roots (ca. 2.5% DW) was at least one order of magnitude higher than that found in roots of Lactuca species and callus culture of L. virosa.

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Section: Resultsmentioning

confidence: 99%

Caffeic acid derivatives from a hairy root culture of Lactuca virosa

et al. 2011

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“…Variable amounts of CA have also been found in other members of the Asteraceae: Taraxacum officinale (Ckhikvishvili and Kharebava 2001), Leontodon autumnalis (Grass et al 2006), Lactuca sativa (Nicolle et al 2004), and in Ocimum basilicum (Lamiaceae; Scagel 2009, 2010). Making direct comparisons between our results and the CA amounts reported in the literature for these plants is difficult because it is not always clear how the calculations have been done, some of the results are expressed on a fresh weight basis, and concentrations were often obtained without taking into account the difference in the responses of the HPLC detector toward CA and the standards used for quantification.…”

Section: Discussionmentioning

confidence: 99%

The economic potential of beach-cast seagrass – Cymodocea nodosa: a promising renewable source of chicoric acid

Grignon‐Dubois

Rezzonico

2013

Botanica Marina

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Detrital and fresh specimens of the seagrass Cymodocea nodosa (Cymodoceaceae) from the Atlantic Ocean and Mediterranean Sea were screened for their phenolic content. For the first time, the major polyphenol was identified as chicoric acid (CA) by means of nuclear magnetic resonance, ultraviolet spectra, liquid chromatography/mass spectrometry, and comparison with standards. The CA content of the crude extracts was determined by quantitative high-performance liquid chromatography. The values found in the leaves ranged from 8.13 to 27.44 mg g -1 dw. The concentration was smaller in the rhizomes, with 0.31-3.70 mg g -1 dw. The phenolic profile was found to be similar whatever the geographical location in the Atlantic Ocean or the Mediterranean Sea. Considering the demonstrated therapeutic applications of CA, its high value on the nutraceutical market, and its rare occurrence in the plant kingdom, the high content found in C. nodosa detrital leaves makes this abundant biomass of interest for dietary and pharmaceutical applications.

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“…Lettuce is a rich source of vitamins A and E, minerals, polyphenols and other bioactive compounds such as carotenoids (NICOLLE et al, 2004a(NICOLLE et al, , 2004b. Carotenoids have pro-vitamin A (HASKELL, 2013) and antioxidant activities, acting on intercellular communication and the immune system, presenting a significant role in preventing various diseases related to oxidative stress such as cancer and cardiovascular diseases, and in lowering cholesterol (HUANG, 1980;CARVALHO et al, 2006;LLORACH et al, 2008;MAIANI et al, 2009;ROCHA;REED, 2014).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Characteristics of Purple Lettuce Harvested at Different Ages

et al. 2016

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-Lettuce is one of the most produced and consumed leafy vegetables in Brazil. It is harvested when the plant reaches full vegetative growth and the leaves are still tender and there are no signs of bolting. The plant is unsuitable for commercialization after this period, thus, a food that is rich in vitamins, minerals and bioactive compounds such as carotenoid is lost. Therefore, the objective of this work was to assess the purple lettuce quality based on physical-chemical characteristics, in three different ages. The experiment was conducted in an urban community garden in Sete Lagoas MG, Brazil. A completely randomized experimental design was used with three replications. The treatments consisted of three development stages (20, 30 and 40 days after transplanting -DAT). The treatment with 40 DAT presented total carotenoids concentration and soluble solids content significantly higher, lower pH, and darker lettuce, with lower values of the parameter b* (increase in yellow color), and higher values of the parameter a* (increase in red color), compared to the first two treatments. The titratable acidity was statistically equal for the three evaluation periods. Considering the high concentration of carotenoids found at 40 DAT, the harvest can take place at this age.Keywords: Development stages. Lactuca sativa. Harvest time. CARACTERÍSTICAS FÍSICO-QUÍMICAS DE ALFACE ROXA COLHIDAS EM DIFERENTES IDADESRESUMO -A alface é uma das hortaliças folhosas mais produzidas e consumidas no Brasil. A colheita ocorre no período em que a planta atinge o crescimento vegetativo máximo, as folhas ainda estão tenras e sem indícios de pendoamento. Após este período, a planta é considerada inadequada para a comercialização, perdendo-se um alimento rico em vitaminas, sais minerais e composto bioativos, como os carotenóides. Desta forma, este trabalho teve o objetivo de avaliar a qualidade com base em mudanças físico-químicas em uma cultivar de alface roxa durante três idades diferentes. O trabalho foi desenvolvido em uma horta comunitária urbana no município de Sete Lagoas -MG. O delineamento experimental foi inteiramente ao acaso com três repetições sendo os tratamentos os três estádios de desenvolvimento (20, 30 e 40 dias após transplantio -DAT). Aos 40 DAT, a concentração de carotenóides totais e o teor de sólidos solúveis totais foram significativamente superiores, o pH foi menor; e a alface se tornou mais escura, apresentando menores valores do parâmetro b* (incremento da cor amarela) e maiores valores do parâmetro a* (incremento da coloração vermelha), diferindo significativamente das duas primeiras colheitas. A acidez titulável foi igual estatisticamente nas três épocas de avaliação. Considerando o alto conteúdo de carotenóides observado aos 40 DAT, pode-se considerar a colheita nesta idade.Palavras-chave: Estádios de desenvolvimento. Lactuca sativa. Ponto de colheita.

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Characterisation and variation of antioxidant micronutrients in lettuce (Lactuca sativa folium)

Cited by 175 publications

References 36 publications

Caffeic acid derivatives from a hairy root culture of Lactuca virosa

Caffeic acid derivatives from a hairy root culture of Lactuca virosa

The economic potential of beach-cast seagrass – Cymodocea nodosa: a promising renewable source of chicoric acid

Physicochemical Characteristics of Purple Lettuce Harvested at Different Ages

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