(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170


Pages: 295-298
I. J. Opara, M. E Onubia, E. O. Onunze, C. O. Oko-Udu and I. Aondoyima

keywords: Citrullus lanatus, phytochemical, proximate, seed, extract


In this study the seeds of Citrullus lanatus were analyzed for their phytochemical compositions. The phytochemical screening result indicates that the seeds contain alkaloids, flavonoids, tannins, glycosides, steroids, terpenoids and saponins. The quantitative analysis for total alkaloids, saponins and flavonoids contents showed that Citrullus lanatus contains 35.613% alkaloids, 4.216% flavonoids and 1.820% saponins. The proximate composition results showed that the mean nutritional content of the Citrullus lanatus seeds contain (4.20±0.01) moisture (2.70±0.02) ash, (7.20±0.01) crude fibre, (32.08±0.03) crude protein, (30.30±0.01) crude lipid, and (23.52±0.04) carbohydrates contents. The proximate analysis also shows that the seeds of Citrullus lanatus havehigh fibre, proteins and lipids contents. The ash content also indicates that the seeds of Citrullus lanatus contain some minerals. Thus, Citrullus lanatus seeds can be used as food supplements.


Adelani A, Tabitha A, AjibaLilian C, Dahunsi SO & Oluyori AP 2015. Antibacterial activity of watermelon (Citrullus lanatus) seed against selected microorganisms. Afr. J. Biotechnol., 14(14): 1224-1229. Ahmed O & Mohammad Ali., 2014. Qualitative and Quantitative Analysis of Phytochemicals of Loranthus bengwensi leaf. Int. R. J. Pharm. Sci., 05(01): 1-3. Ahmed RN, Jumah SS, Arekemase MO, Agbabiaka TO, Adam AI & Adejoro DO 2017. Serial exhaustive extraction: Influence of solvent polarity on antibacterial activity of extracts of leaves of Tithonia diversifolia. Nig. J. Pure & Appl. Sci., 30 (1): 1-10. AOAC 2000. Association of Official Analytical Chemists; Official method of analysis. 15thEdn, Washington DC, p. 212. Aremu MO, Olaofe O & Akintayo ET 2006. A comparative study on the chemical and amino acid composition of some Nigerian underutilized legume flours. Pak. J. Nutr., 5: 34 – 38. Betty T, Jacob KA, Faustina D & Elsa IO 2016. Watermelon seeds as food: Nutrient composition, phytochemicals and antioxidant activity. Int. J. Food Sci. Nutr., 5(2), 139-144. Damilola AO, Glory OC, Garba JD, Chintua EI, Kerian CN, Martin UO & Flourence AA 2015. Evaluation of chemical compositions of Citrulluslanatus seed & Cocos nucifera stem bark. Afr. J. Food Sci., 6(3): 75-83. Harborne JB 1973. Phytochemical Methods. 3rd edn. Chapman and Hall Ltd., London, pp. 135-203. Krishnaiah D, Devi T, Bono A & Sarbatly R 2009. Studies on phytochemical constituents of six Malaysian medicinal plants. J. Med. Plants Res., 3(2): 67-72. Loukou AL, Gnakri D, Dje Y, Kippre AV, Malice M, Baudoin JP & Zoro B 2007. Macronutrient composition of three cucurbit species cultivated for seed consumption in Cote D’lvoire. Afr. J. Biotech., 6(5): 529-533. Mabalaha MB, Mitei YC & Yoboah SO 2007. A Comparative study of the properties of selected melon seeds oils as potential candidates for development into commercial edible vegetable oil. J. Am. Oil Chem. Soc., 84: 31-34. Njoku PC & Akumefula MI 2007. Phytochemical and nutrient evaluation of spondias mombin leaves. Pak. J. Nutr., 6: 613-615. Obadoni BO & Ochuko PO 2001. Phytochemical studies and comparative efficacy of the crude extracts of some homeostatic plants in Edo and Delta States of Nigeria. Global J. Pure & Appl. Sci., 8: 203-208. Ochwang’I DO, Kimwele CN, Oduma JA, Gathumbi PK & Kiama SG 2016. Phytochemical screening of medicinal plants of the Kakamega Country, Kenya commonly used against Cancer. Med Aromat Plants, 5: 277. Okwu D 2004. Phytochemicals and vitamin content of indigenous species of south-eastern Nigeria. J. Sustain. Agric. Environ., 6(1): 30-37. Okwu DE & Josiah C 2006. Evaluation of the chemical composition of two Nigerian medicinal plants. Afr. J. Biotech., 5 (4): 357-361. Olaofe O, Okiribiti BY & Aremu MO 2008. Chemical evaluation of the nutritive value of smooth luffa (Luffa cylindrica) seed’s kernel. Elec. J. Env. Agricult. Food Chem., 7(10): 3444 – 3452. Otutu OL, Seidu KT, Muibi BO, Oladokun F & Oyalowo MR 2015. Potential food value of watermelon (Citrullus lanatus) seed constituents. IJST., 3(7): 1-10. Oyeleke GO, Olagunju EO. & Ojo A 2012. Functional and physicochemical properties of watermelon (Citrullus lanatus) seed and seed-oil. IOSR-JAC., 2(2): 29-31. Pradeepa M, Kalidas V & Geetha N 2016. Qualitative and quantitative phytochemical analysis and bactericidal activity of pelargonium graveolens l’her. Int J App Pharm., 8 (3): 7-11 Rita N., Baruah KK, Sarma S, Bhuyan R., Roy DC & Mithu D2015. Phytochemical Screening of Different Plants of North-Eastern Region of India.J Biosci Bioeng., 2:9-11 Rohit KB 2015. Preliminary test of phytochemical screening of crude ethanolic and aqueous extract of Moringa pterygosperma Gaertn. J. Pharmacogn Phytochem., 4(1): 07-09 Sahira B & Catherine L 2015 General techniques involved in phytochemical analysis. IJARCS., 2(4): 25-32. Salem ME, Atega A, Afifa O & Fouzy A 2016. Qualitative and quantities analysis of phytochemicals of various extract for Ephedraaltissima from Libya. J. Med. Plants Stud., 4(3): 119-121. Sofowara A 1990. “Phytochemical screening of nigerian medicinal plants”. Parts III, Lioyeria., 41: 234-246. Soheil ZM, Bey HG, Chim KC, Tara S & Habsah AK 2013. Biological activities and phytochemicals of Swietenia macrophylla King. Molecules., 18: 10465-10483. Stray F 1998. The natural guide to medicinal herbs and plants. Tiger Books International, London, pp. 12-16. Tawheed A & Monika T 2014. A comparative study on proximate composition, phytochemical screening, antioxidant and antimicrobial activities of Linum usitatisimum L. (flaxseeds). Int. J. Curr. Microbiol. App. Sci., 3(4): 465-481. Trease GE & Evans WC 1989. “Pharmacognosy” 11th edn, Baillere Tindoll, London, pp. 45-50. Usunobun U, Okolie NP, Anyanwu OG & Adegbegi AJ 2014.Phytochemical screening and proximate composition of Annona muricata leaves. EJBPSP., 2 (1): 18-28. Yanty NA, Lai OM, Osman KL & Ghazali HM 2008. Physicochemical properties of cucumis Melo Var. Inodorus (Honeydew melon) seed and seed oil. J. Food Lipids., 15(1): 42-55.