Les glycosides flavoniques marqueurs de quelques cultivars algériens du palmier dattier Phoenix dactylifera L.

Ouafi, Saïda; Riveil, Nicole

doi:10.4000/books.irdeditions.10751

Cited by 5 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Flavan-3-ols were also part of the phenolic composition of the leaves, the main ones being (+)-catechin and (−)-epicatechin. More complex forms of flavans (proanthocyanidins), as detected in the present study, were also reported by Ouafi et al (1988). Phenolic profiles of date seeds have not previously been reported though there are several reports on the HPLC phenolic profile of date fruits (Al-Farsi et al, 2005;Mansouri et al, 2005;Hong et al, 2006).…”

Section: High Performance Liquid Chromatographic (Hplc) Analysis Of Psupporting

confidence: 85%

“…They were chiefly flavonol heterosides. These two aglycons (quercetin and isorhamnetin) were previously detected by acid hydrolysis in the leaves of some date palm cultivars (Ouafi et al, 1988). Flavan-3-ols were also part of the phenolic composition of the leaves, the main ones being (+)-catechin and (−)-epicatechin.…”

Section: High Performance Liquid Chromatographic (Hplc) Analysis Of Pmentioning

confidence: 75%

See 1 more Smart Citation

Phenolic content, antioxidant and anti-inflammatory activities of seeds and leaves of date palm (Phoenix dactylifera L.)

John¹,

Shahidi²

2019

JFB

View full text Add to dashboard Cite

The total phenolic content of date palm (Phoenix dactylifera L.) seeds (samples 1 and 2) and leaves were determined and for the first time their antioxidant activity in a food system investigated. The anti-inflammatory activity and potency of samples in the inhibition of radical-induced DNA scission and human low-density lipoprotein (LDL) cholesterol oxidation was also evaluated. The total soluble phenolic content of the date palm leaves was 106.96 mg gallic acid equivalents (GAE)/g sample and ranged from 68.73 to 82.62 mg GAE/g of date seeds. Extracts showed good radical scavenging activity in the different in vitro tests conducted in this work and were found to be effective in inhibiting the oxidation of cooked ground meat. Soluble phenolic extract from date seeds of sample 1 was most effective in inhibiting DNA strand scission by 74.15%, while soluble phenolics from palm leaves showed the highest inhibition of LDL cholesterol oxidation (87.82%). Both samples significantly inhibited mRNA level of COX-2 at concentrations as low as 5 μg/mL, with the most potent inhibitory effect being for date palm leaf extracts at 50 μg/mL. A number of phenolic compounds including proanthocyanidin dimers, catechin, epicatechin, 5-O-caffeoylshikimic acid isomers, ferulic acid, rutin and isorhamnetin hexoside, among others, were detected in date palm seeds and leaves.

show abstract

Section: High Performance Liquid Chromatographic (Hplc) Analysis Of Psupporting

confidence: 85%

Section: High Performance Liquid Chromatographic (Hplc) Analysis Of Pmentioning

confidence: 75%

Phenolic content, antioxidant and anti-inflammatory activities of seeds and leaves of date palm (Phoenix dactylifera L.)

John¹,

Shahidi²

2019

JFB

View full text Add to dashboard Cite

show abstract

“…One of the often-used strategies to determine the degree of diversity and variation in PD is the use of morphological parameters (quantitative and qualitative traits). It has therefore been widely believed that characteristics linked to either the vegetative or the fruit parameters are helpful for date palm characterization (Shabana and Mawlod, 1983;Bouabidi et al, 1996;Elhoumaizi et al, 2002). Several teams have described the morphological characterizations (quantitative and qualitative) of the PD in Saudi Arabia (Jaradat and Zaid, 2004;Al-Khalifah et al, 2012, Khankahdani andBagheri, 2019) and also molecular characterization using AFLP, ISSR, RAPD markers (Sabir et al, 2014;Abdulla and Gamal, 2010;Aljuhani, 2016).…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

Characterization of palm date varieties (Phoenix dactylifera L.) growing in Saudi Arabia: Phenotypic diversity estimated by fruit and seed traits

ALRASHIDI

JAMAL

ALAM

et al. 2023

Not Bot Horti Agrobo

View full text Add to dashboard Cite

In order to determine the variation and the degree of diversity among the most well-known Saudi date palm (Phoenix dactylifera L.), this study applied various widely detectible fruit and seed features. The properties of the fruit and seeds were described using ten phenotypic traits. Eighteen date palm varieties from six production sites were used in this study (Ḥaʼil, Al-Madina, Al-Hassa, Al-Qassim, Kharaj, Najran). The data was analysed by Pearson r correlation. The principal components analysis (PCA) and UPGMA clustering were used to analyse the data set. According to PCA, the results showed significant variation among the analysed varieties. Our data shows that seed ratio varies among all varieties. The mean seed weight ratio varies between 4 and 13%. Varieties ‘Raziz’, ‘Lubab’ and ‘Wasily’ demonstrate higher seed ratio (over 10%). Whereas, Fankha depicts a 5 and 4% fresh and dry seed ratio. The statistical analysis indicates that the seed ratio in all 18 varieties is comparable in fresh and dry fruits. The result suggests variation among the numerous features due to dissimilarities and heterogeneity. However, the obtained results also propose the clustering and grouping of closely related features, e.g., weights of fresh and dry fruits. Eventually, it is suggested to conduct additional research on Saudi date palms utilizing more phenotypic traits in order to have a better understanding of the pack of morphological descriptors.

show abstract

“…The definition of flavone content of the species seemed to us interesting to acquire, since the "small molecules" are recognized both as genetic markers and as molecules of relationship. Initially, a flavone type cultivar was proposed, essentially based on the profile flavones/flavonols and opened the way to the taxonomy and infra specific genetic [4][5][6][7]. In this work, we present results on the physiology of polyphenols in response to infection by the Fusarium in order to find a possible relationship between metabolism of the parasite and that of date palm cultivars studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fusariosis on the Metabolism of Phenolics Compounds of Date Palm Leaflets, Resistant and Sensitive to the Disease

Ouafi¹,

Bounaga²

2012

JFSE

View full text Add to dashboard Cite

Because of socioeconomic importance of date palm in North Africa, the scientific community has always followed the progression of parasitic disease that affects it. The study was performed on population of thirty palm trees belonging to three cultivars of the oases of southwest Algeria TOUAT Gourara. The analytical protocol consists of a hot hydrochloric acid hydrolysis of 1 g of leaf material dried and ground. Structural analysis of compounds present in extracts was conducted by chromatographic and spectrophotometric techniques. Through the analysis of all HPLC profiles of phenolic acids, we have established three chemotypes: resistant with the highest heights, sensitive, with the lowest height, finally low sensitivity or tolerant with intermediate heights. The increased synthesis of C-glycoflavones, within diseased palms, can be seen as the first sign of plant response to fungal attack, or even as a defense mechanism so these flavonoids correspond to "pre-inhibitines". It has not been found qualitative differences between different cultivars studied. The merits of our work show a negative correlation between flavonoid content and the level of lignification in the date palm, suggests that the process of lignification is more rapid in resistant cultivars. We can say that there is a constitutive resistance.

show abstract

Les glycosides flavoniques marqueurs de quelques cultivars algériens du palmier dattier Phoenix dactylifera L.

Cited by 5 publications

References 1 publication

Phenolic content, antioxidant and anti-inflammatory activities of seeds and leaves of date palm (Phoenix dactylifera L.)

Phenolic content, antioxidant and anti-inflammatory activities of seeds and leaves of date palm (Phoenix dactylifera L.)

Characterization of palm date varieties (Phoenix dactylifera L.) growing in Saudi Arabia: Phenotypic diversity estimated by fruit and seed traits

Effect of Fusariosis on the Metabolism of Phenolics Compounds of Date Palm Leaflets, Resistant and Sensitive to the Disease

Contact Info

Product

Resources

About