ABSTRACT Date Palm (Phoenix dactylifera) is one of the important fruit enriched with an impressive list of essential nutrients and a wide range of phenolic compounds with high antibacterial compounds. In order to provide further detailed information on phenolic compounds and antibacterial activities of Date Palm (Phoenix dactylifera), the current study was devoted to investigate and compare three different highly consumable varieties of date palm (Phoenix dactylifera) cultivars, namely Ajwa, Khalas Alkharj, and Al-Qasim for their broad spectrum antibacterial effect and phenolic compounds. The antibacterial properties of their methanolic extracts were evaluated against Streptococcus pnuemoniae, Bacillus subtilis, Klebsiella pneumonia, Staphylococcus aureus, Escherichia coli. All of the three cultivars displayed a broad spectrum of inhibitory effect against these pathogenic bacteria. Moverover, the LC- Linear Ion Quadrupole Mass Spectrometric Analysis (LC-MS and LC-MS/MS Tandem Mass Spectrometry) analysis revealed the presence of 3,30-di-O-methyl ellagic acid, 7-Methoxyquercetin-O-hexose isomers, caffeic acid, ferulic acid, isomers of quercentin-rutinoside, kaempferol methylether, p hydroxybenzoic acid, phytol, punicalagin and quercetin-3-O-glucoside (isoquercitrin) were in Ajwa, 3,30-di-O-methyl ellagic acid isomers, 3,30-di-O-methyl ellagic acid, caffeic acid derivative, cafeic acid, caffeoyl glucose, caffeoylshikimic acid, ferulic acid, guaiacyl(8–5)ferulic acid hexoside isomer, isorhamnetin-3-Ohexoside, oxooctadecanoic acid, punicalagin and quercetin derivativein Al-Qasim extracts while 2(3,4-Dihydroxyphenyl)-7-hydroxy-5-benzene propanoic acid isomer, 2(3,4-Dihydroxyphenyl)-7-hydroxy-5-benzene propanoic acid, decanoic acid derivative, diosmetin, kaempferol-3-rutinoside, linolenic acid, oxooctadecanoic acid conjugate and punicalagin in the extract of Khalas date. The findings of the current study may increase our knowledge about the importance of dates in diet and can be utilized as natural antimicrobial agents in the foods industry.

中文翻译：

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沙特阿拉伯本地枣椰树（Phoenix dactylifera）品种的酚类分析和抗菌潜力

摘要 枣椰树（Phoenix dactylifera）是一种重要的水果，富含一系列令人印象深刻的必需营养素和多种酚类化合物，并具有高抗菌化合物。为了提供有关枣椰树 (Phoenix dactylifera) 酚类化合物和抗菌活性的进一步详细信息，本研究致力于调查和比较三种不同的高消费枣椰树品种，即 Ajwa、Khalas Alkharj、和 Al-Qasim 具有广谱抗菌作用和酚类化合物。评估了它们的甲醇提取物对肺炎链球菌、枯草芽孢杆菌、肺炎克雷伯菌、金黄色葡萄球菌、大肠杆菌的抗菌特性。所有三个栽培品种都显示出对这些病原菌的广谱抑制作用。此外，LC-线性离子四极杆质谱分析（LC-MS 和 LC-MS/MS 串联质谱）分析显示存在 3,30-二-O-甲基鞣花酸、7-甲氧基槲皮素-O-己糖异构体、咖啡酸、阿魏酸、槲皮素-芸香苷的异构体、山奈酚甲醚、对羟基苯甲酸、植醇、安石榴苷和槲皮素-3-O-葡萄糖苷（异槲皮苷）均在Ajwa中，3,30-二-O-甲基鞣花酸是, 3,30-二-O-甲基鞣花酸、咖啡酸衍生物、咖啡酸、咖啡酰葡萄糖、咖啡酰莽草酸、阿魏酸、愈创木酸(8-5)阿魏酸己糖苷异构体、异鼠李素-3-Ohexoside、氧代十八烷酸、安石榴苷Al-Qasim 提取物中的槲皮素衍生物，而 2(3, 4-二羟基苯基)-7-羟基-5-苯丙酸异构体、2(3,4-二羟基苯基)-7-羟基-5-苯丙酸、癸酸衍生物、地香豆素、山奈酚-3-芸香苷、亚麻酸、卡拉斯枣提取物中的氧代十八烷酸共轭物和安石榴苷。当前研究的结果可能会增加我们对枣子在饮食中的重要性的认识，并可用作食品工业中的天然抗菌剂。