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Phytochemical Composition and Antioxidant Activity of Trichoderma reesei Degraded Date (Phoenix dactylifera L.) Pits

[ Vol. 16 , Issue. 4 ]

Author(s):

Salem R. Alyileili, Ahmed S. Hussein, Wissam Ibrahim* and Khaled A. El-Tarabily*   Pages 528 - 536 ( 9 )

Abstract:


Background: Date palm (Phoenix dactylifera L.) is a dominant fruit crop in most of the Ara-bian countries. Date pits, as a major byproduct which remained after consumption of date flesh proved to be valuable source of energy.

Methods: Solid State Degradation (SSD) system was used for the preparation of degraded date pits. Date pits degraded with Trichoderma reesei were evaluated for their proximate, chemical composition and antioxidant activity.

Results: The crude fiber content of degraded date pits was found to be 20.8 %, ash (2.09%), crude fat (7.2%), protein (5.56%), and total carbohydrate (87.2%). Neutral detergent fiber (NDF) and acid deter-gent fiber (ADF) was found to be 74.6% and 45.7%, respectively. Monosaccharide composition of fiber showed that the degradation with T. reesei significantly (P<0.05) enhanced the glucose and mannose content of cellulose, hemicellulose and lignin. Pectin, total carbohydrate and mannan oligosaccharide content were also increased in degraded date pits in which galactose and mannose were the major neu-tral sugars. Among the studied minerals, potassium, calcium, magnesium, sulphur and phosphorus were predominant. The phenolic and flavonoid contents of degraded date pits significantly (P<0.05) increased to 14.230 g Gallic equivalent/100g DW and 11.68 g Rutin equivalent /100g DW. Degraded date pits also showed significant antioxidant activity as evidenced by the results of 2,2-diphenyl-1-picrylhydrazyl(DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline 6 sulphonicacid) (ABTS) and Ferric Re-ducing Antioxidant Power (FRAP) assays

Conclusion: Biological degradation with T. reeseisignificantly (P<0.05) improved the nutritional effect of date pits and thereby its potential usage in food industry was greatly improved

Keywords:

Proximate composition, fungi-degraded date pits, monosaccharides, Trichoderma reesei, antioxidant activity.

Affiliation:

College of Food and Agriculture, Department of Aridland Agriculture, United Arab Emirates University, P. O. Box 15551, Al-Ain, College of Food and Agriculture, Department of Aridland Agriculture, United Arab Emirates University, P. O. Box 15551, Al-Ain, College of Food and Agriculture, Department of Nutrition and Health, United Arab Emirates University, P. O. Box 15551, Al-Ain, College of Science, Department of Biology, United Arab Emirates University, P. O. Box 15551, Al-Ain



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