Chemical Composition, Antioxidant and Antibacterial Activity of Tunisian Date Palm Seed
A 2019 investigation compared seeds from 11 date palm cultivars in Gabès and Deglet Nour from Kébili, Tunisia. Researchers measured seed composition, phenolic compounds, antioxidant activity and antibacterial effects.The results revealed substantial differences among cultivars. Khadhouri ranked highly for total phenolics, while laboratory antibacterial activity depended on the extract and tested organism.
What the study did and found
Researchers compared 12 cultivars, measuring protein, fat, sugars, fibre, minerals, phenolics, flavonoids and anthocyanins. They also evaluated DPPH radical-scavenging activity and antibacterial effects of prepared seed extracts. Total phenolic content ranged from 5.13 g GAE/100 g dry weight in Lemsi to 9.53 g GAE/100 g in Khadhouri.
The numerical table identified Korkobi as having the highest DPPH inhibition at 55.47%, followed by Khadhouri at 54.58%. The abstract, however, attributed the maximum to Khadhouri. Methanol extracts generally showed the greatest antibacterial activity, but none of the tested extracts inhibited Enterococcus faecalis. Principal component analysis separated the cultivars into four groups.
Why it is cited
The paper documents variation in date seed chemistry across named Tunisian cultivars, rather than treating all date seeds as equivalent. Its comparison of composition with antioxidant and antibacterial assays supports further investigation of seeds as agricultural by-products and potential sources of useful compounds.
The work also illustrates why cultivar identity and extraction conditions matter when comparing laboratory findings. Its multivariate analysis offers an additional view of how measured characteristics differed among the seed samples.
The findings concern analysed seed samples and laboratory assays. DPPH activity and bacterial inhibition zones do not establish therapeutic benefits, safe human doses or clinical effectiveness. The inconsistency between the numerical table and abstract also limits certainty about which cultivar had the highest antioxidant result.Potential food or industrial applications would require further evidence on processing, stability, product performance and safety. Results from different solvents and experimental methods should not be treated as interchangeable. |
The topic today
Date palm seeds remain relevant to research on agricultural by-product use, fibre-rich ingredients, oils and plant-derived compounds. The 2019 comparison provides a baseline for evaluating cultivar-specific differences, but it does not identify one cultivar as best for every purpose.
Future application-specific studies can investigate extraction efficiency, reproducibility and practical processing conditions. The reported laboratory bioactivity should remain distinct from claims about effects in humans.