Diphenolases from two cultivars of cherry laurel (Laurocerasus officinalis Roem.) fruits at an early stage of maturation

Çolak, Ahmėt; Özen, Arzu; Dinçer, Barbaros; Güner, Saadettin; Ayaz, Faik Ahmet

doi:10.1016/j.foodchem.2004.06.004

Cited by 36 publications

(36 citation statements)

References 30 publications

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“…Similar to our study, optimum pH for PPO enzyme has been reported to range from 5.5 to 7.5 for persimmon 42 and Jonagored apple 40 against 4-methyl catechol, catechol and DOPA. Similar pH behavior has also been reported for other fruits of the family Rosaceae 38,41,42 . Similarly, pH optimum for PPO enzyme was reported as 7.0 for Amasya apple 43 .…”

Section: Resultssupporting

confidence: 85%

“…Similarly, pH optimum for PPO enzyme was reported as 7.0 for Amasya apple 43 . The pH optimum for a PPO enzyme is clearly highly dependent on the enzyme sources and the nature of the substrate 41 . The optimum temperature of the crude enzyme was measured over an initial time period and determined at different temperatures ranging from 0 C to 80 C. The results indicated that the crude PPO activity against the substrates ranged from 20 C to 40 C (Table 4).…”

Section: Resultsmentioning

confidence: 99%

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Polyphenol oxidase activity and antioxidant properties of Yomra apple (Malus communisL.) from Turkey

Can

Dinçer²,

Şahin

et al. 2013

Journal of Enzyme Inhibition and Medicinal Chemistry

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In this study, firstly, antioxidant and polyphenol oxidase (PPO) properties of Yomra apple were investigated. Seventeen phenolic constituents were measured by reverse phasehigh-performance liquid chromatography (RP-HPLC). Total phenolic compounds (TPCs), ferric reducing antioxidant power (FRAP) and 2, 2-diphenyl-1-picrylhydrazyl radical (DPPH) scavenging activities were performed to measure antioxidant capacity. Some kinetic parameters (K m , V max ), and inhibition behaviors against five different substrates were measured in the crude extract. Catechin and chlorogenic acid were found as the major components in the methanolic extract, while ferulic acid, caffeic acid, p-hydroxybenzoic acid, quercetin and p-coumaric acid were small quantities. K m values ranged from 0.70 to 10.10 mM in the substrates, and also 3-(4-hydroxyphenyl) propanoic acid (HPPA) and L-DOPA showed the highest affinity. The inhibition constant of K i were ranged from 0.05 to 14.90 mM against sodium metabisulphite, ascorbic acid, sodium azide and benzoic acid, while ascorbic acid and sodium metabisulphite were the best inhibitors.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Polyphenol oxidase activity and antioxidant properties of Yomra apple (Malus communisL.) from Turkey

Can

Dinçer²,

Şahin

et al. 2013

Journal of Enzyme Inhibition and Medicinal Chemistry

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“…(Cherry laurel) is grown as a native fruit in the coasts of the Black Sea region of Turkey and locally called "Taflan" or "Karayemiş" [13] . It was found that L. officinalis fruit is a rich source of antioxidant substances such as phenolics (chlorogenic acid, phenolic acids, anthocyanins, vanillic acid) and ascorbic acid [14][15][16][17][18][19][20] . Some studies indicated that L. officinalis fruit has radical scavenging action against superoxide and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals [15,19,21] .…”

Section: Introductionmentioning

confidence: 99%

Sıçanlarda Dimetoatla Oluşturulan Hepatotoksisite Üzerine Taflan (Laurocerasus officinalis Roem.) Meyvesinin Koruyucu Etkisi

Eken¹,

Endirlik²,

Baldemir³

et al. 2017

Kafkas Univ Vet Fak Derg

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Citation of This ArticleEken A, Ünlü Endirlik B, Bakır E, Baldemir A, Yay AH, Cantürk F: Effect of Laurocerasus officinalis Roem. (Cherry laurel) fruit on dimethoate induced hepatotoxicity in rats. Kafkas Univ Vet Fak Derg, 23 (5): 779-787, 2017779-787, . DOI: 10.9775/kvfd.2017 Abstract Dimethoate is one of the most important organophosphate insecticides and may cause oxidative stress leading to production of free radicals and alterations in antioxidants. The aim of this study was to investigate the protective effects of Laurocerasus officinalis Roem. fruit extract containing antioxidant compounds on dimethoate-induced hepatotoxicity in rats. The rats were divided into six groups as follows: Control group; dimethoate-treated group; L. officinalis-treated group; the group of pre-treatment with L. officinalis prior to dimethoate; the group of pre-treatment with vitamin C before dimethoate; the group of post-treatment with L. officinalis after dimethoate. Aspartate transaminase (AST), alanine transaminase (ALT), and total bilirubin (TBil) as liver function tests and the oxidative stress parameters such as total oxidant status (TOS), total antioxidant status (TAS), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and malondialdehyde (MDA) were measured. The DNA damage was determined with comet assay. The results indicated that dimethoate caused a significant increase in AST, ALT, TOS, MDA, DNA damage and an important decrease in TAS, SOD, CAT, GPx as compared to control group. However, administration of L. officinalis or vitamin C to dimethoate-exposed rats restored these biochemical and oxidative stress parameters to nearly normal levels. In conclusion, toxic effects of dimethoate on rat liver are mainly attributed to hepatic function enzymes, oxidative stress and DNA damage, while these effects were largely ameliorated by L. officinalis fruit extract. Keywords: Laurocerasus officinalis Roem, Cherry Laurel, Dimethoate, Hepatotoxicity, Rat Sıçanlarda Dimetoatla Oluşturulan Hepatotoksisite Üzerine Taflan (Laurocerasus officinalis Roem.) Meyvesinin Koruyucu Etkisi ÖzetDimetoat en önemli organofosfatlı insektisitlerden biridir, serbest radikallerin üretimine ve antioksidanlarda değişimlere yol açarak oksidatif strese neden olur. Çalışmanın amacı, ratlarda antioksidan bileşikler içeren Laurocerasus officinalis Roem. meyve ekstresinin dimetoat kaynaklı karaciğer toksisitesindeki koruyucu etkilerini incelemektir. Ratlar aşağıdaki gibi altı gruba ayrıldı: Kontrol grubu; dimetoate ile muamele edilen grup; L. officinalis ile muamele edilen grup; dimetoat öncesi L. officinalis verilen grup; dimetoat öncesi vitamin C verilen grup; dimetoat sonrası L. officinalis ile muamele edilen grup. Karaciğer fonksiyon testleri olarak aspartat transaminaz (AST), alanin transaminaz (ALT) ve toplam bilirubin (TBil) ile toplam oksidan durum (TOS), toplam antioksidan durum (TAS), süperoksit dismutaz (SOD), katalaz (CAT), glutatyon peroksidaz (GPx) ve malondialdehit (MDA) gibi oksidatif stres parametreleri ölçüldü. DNA...

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“…The fruit is about 8mm in diameter and contains one large seed. Water distilled from the leaves is used as an almond flavoring and perfumery (Baytop, 1984, Ayaz et al, 1997Kolayli et al, 2003;Ercisli, 2004;Colak et al, 2005;Liyana-Pathirana et al, 2006;Celik et al, 2011;Beyhan, 2010;Islam et al, 2010;Anonymous, 2014). In Turkey, many researchers have done on cherry laurel on the content of chemicals, antioxidants, quality attributes, selection and long term pollen storage of non-sprayed genotypes (Kolayli et al, 2003;Beyhan, 2010;Islam et al, 2010;Sulusoglu, 2011, Celik et al, 2011Yıldız et al, 2014;Sulusoglu, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of cutting time and IBA application on rooting of edible cherry laurel (Prunus laurocerasus cv. 'Kiraz') cuttings

Çelik¹,

İslam²,

Kalkışım³

2015

Anadolu J. Agr. Sci.

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Cherry laurel known as "karayemiş", "laz cherry" or "taflan", is a popular evergreen racemes fruit in Turkey and some other Caucasus countries. In this study, cherry laurel variety 'Kiraz' was propagated with hardwood, semi-hardwood and softwood cuttings with half leaf and effect of IBA application on rooting ability was determined. Cuttings with different lignification phase were collected from October, December, February (hardwood cuttings), May (softwood cuttings) and June (semi-hardwood cuttings) between 15th to 20th days and subjected to 0, 50, 100, 500 and 1000 ppm Indolebutryicacid (IBA). Cuttings were planted in bottom heated trays with perlite and over misting under greenhouse conditions. The percentages of rooting (100%), rootling (100%) and mortality (100%) were the highest at July's semi-hardwood cuttings while rooting degree was the highest at December hardwood cuttings (7.72). 100 ppm IBA concentration gave the highest ratios of rooting (96.44%), first grade rootling (90.22%) and mortality rate (84.89%). These results suggest that cherry laurel varieties could be easily propagated easily by July's semi hardwood cuttings subjected to 100 ppm IBA in perlite has bottom heating under greenhouse conditions with misting.Çelik alma zamanı ve IBA uygulamasının karayemiş (Prunus laurocerasus cv. 'Kiraz') çeliklerinin köklenmesi üzerine etkileri Anahtar Sözcükler: Cherry laurel Cutting time IBA Rooting ÖZET "Laz kirazı" veya "taflan" olarak da adlandırılan karayemiş, son yıllarda Türkiye ve bazı Kafkas ülkelerinde popüler olmaya başlayan herdemyeşil bir meyvedir. Bu çalışmada Prunus laurocerasus türüne ait Kiraz karayemiş çeşidinden farklı zamanlarda alınmış olan yeşil, yarı-odunsu ve odunsu yapraklı çeliklerin köklenmesi üzerine farklı dozlardaki IBA uygulamalarının etkisi araştırılmıştır. Ekim, Aralık, Şubat ve Temmuz aylarının ilk yarısında ve farklı odunlaşma aşamalarında alınan çelikler 5 farklı dozda (0, 50, 100, 500 ve 100 ppm) IBA uygulanmıştır. Çelikler sera şartlarında alttan ısıtmalı tavalardaki perlit içerisinde ve mistleme altında köklendirilmiştir. Temmuz ayında alınan yarı odunsu çelikler köklenme, fidan randımanı ve yaşama oranı bakımından %100'lük başarı göstermiştir. Köklenme derecesi ise Aralık ayında alınan çeliklerde 7.72 ile en yüksek olmuştur. 100 ppm IBA dozu gerek köklenme (%96.44), gerek fidan randımanı (%90.22) gerekse yaşama oranı bakımından en yüksek değerleri vermiştir. Bu çalışmanın sonuçlarına göre karayemişler, Temmuz ayında alınan yapraklı yarı odunsu çeliklere 100 ppm gibi düşük IBA dozu uygulanarak seradaki perlit ortamında ve mistleme altında kolaylıkla çoğaltılabilir.

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Diphenolases from two cultivars of cherry laurel (Laurocerasus officinalis Roem.) fruits at an early stage of maturation

Cited by 36 publications

References 30 publications

Polyphenol oxidase activity and antioxidant properties of Yomra apple (Malus communisL.) from Turkey

Polyphenol oxidase activity and antioxidant properties of Yomra apple (Malus communisL.) from Turkey

Sıçanlarda Dimetoatla Oluşturulan Hepatotoksisite Üzerine Taflan (Laurocerasus officinalis Roem.) Meyvesinin Koruyucu Etkisi

Effect of cutting time and IBA application on rooting of edible cherry laurel (Prunus laurocerasus cv. 'Kiraz') cuttings

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