Journal of Food, Agriculture and Environment

Vol 8, Issue 1,2010
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Diversity of antioxidant properties and phenolic content of date palm (Phoenix dactylifera L.) fruits as affected by cultivar and location


Saleh Al-Turki, Mohamed A. Shahba *, Cecil Stushnoff

Recieved Date: 2009-09-03, Accepted Date: 2009-12-10


Fruits of the date palm are very commonly consumed in many parts of the world and are a vital component of the diet. Date fruits were found to be a good source of antioxidant components. The antioxidant properties of date fruits vary depending on their content of phenolic components, vitamin C and flavonoids. Fruits of ten cultivars from USA and fruits of five cultivars from Saudi Arabia were collected in 2006 and 2007 to characterize and compare total phenolics content and antioxidant activities among them and to study the difference between ABTS and DPPH methods in measuring antioxidant activity in addition to the effect of growth location on antioxidant activity and phenolics content. Fruits of cultivars collected from Saudi Arabia had higher dry matter content than those collected from USA. In most of the tested cultivars, total phenolics contents were significantly higher during the second year of the study. Ranking of tested cultivars for total phenolics content indicated that SA4 (Gur) cultivar had the highest total phenolics content (507.0 mg GAE/100 g FW) during the second year of the study followed by US3 (Deglet Noor) cultivar which had a total phenolics content of 488.0 mg GAE/100 g FW during the same year. The lowest content was found in US9 (225.0 mg GAE/100 g FW) followed by US8 (Khalasa) (241.9 mg GAE/100 g FW) and US1 (258.4 mg GAE/100 g FW). US3 cultivar had higher antioxidant activity during the second year as compared to the first year of the study while SA5 (Khunizi) had higher antioxidant activity during the first year of the study. Over all cultivars, the second year samples had higher antioxidant activity than those of the first year as measured by either ABTS or DPPH. In general, US3, SA5 and SA4 had the highest antioxidant activity over all cultivars while US8, US9 (Medjool) and US2 (Barhee) had the lowest antioxidant activity over all cultivars. Although ABTS analysis indicated a higher antioxidant activity as related to the total phenolics contents in most cultivars, concordance correlation analysis indicated that DPPH analysis had higher reproducibility. Over all cultivars tested from both years, the antioxidant activity as related to total phenolics content was higher in samples collected from Saudi Arabia which indicate the higher efficiency of their phenolics content in free-radical-scavenging activity. In conclusion, the fruits of different date palm cultivars have different physical and chemical characteristics including dry matter content, total phenolics content and antioxidant activity. Total phenolics assay may be good indicator to evaluate antioxidant properties in date fruit.


Date palm cultivars, date fruits, ABTS, DPPH, antioxidant, total phenolics

Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 1
Category: Agriculture
Pages: 253-260

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :