Molehiya (Corchorus olitorius L.) Bitkisinde Antioksidan Aktivitenin Belirlenmesi

Öz

Molehiya (Corchorus olitorius L.) bazı Akdeniz ülkeleri, Afrika ve Asya ülkelerinde yetiştirilen tek yıllık, otsu bir sebze türüdür. Kuzey Kıbrıs Türk Cumhuriyetinde yaz döneminde yaygın olarak yetiştirilmekte, taze veya kuru yaprakları pişirilerek tüketilmektedir. Araştırmalar, molehiya bitkisinin karotenoid, C vitamini, E vitamini, mineral maddeler, folik asit, a-linolenik asit içeriği bakımından zengin, besleyici değeri yüksek bir tür olduğunu bildirmektedir. Sebzelerde bulunan antioksidan maddelerin, serbest oksijen radikallerinin zararlarına karşı koruduğu ve insan sağlığı bakımından yararlı olduğu belirtilmektedir. Sunulan çalışmada, molehiya bitkisinin yaprak örneklerinde 2,2-diphenyl-l-picrylhydrazyl (DPPH) yöntemi ile antioksidan aktivite belirlenmiştir. Elde edilen sonuçlar molehiyada % inhibisyon olarak hesaplanan antioksidan aktivitenin ortalama %32.64±5.36 olduğunu ortaya koymuştur.

Anahtar Kelimeler

• Corchorus olitorius
• molehiya
• antioksidan aktivite

Determination of Antioxidant Activity in Molokhia (Corchorus olitorius L.)

Öz

Molokhia (Corchorus olitorius L.) is an annual leaty vegetable growing in some Mediterranean, African and Asian countries. It is grown extensively in Turkish Republic of Northern Cyprus and consumed widely by cooking its fresh or dried leaves. Studies revealed that molokhia is rich in carotenoids, vitamins C and E, minerals, folic acid, a-linolenic acid and therefore has high nutritional value. Antioxidants in vegetables are reported to protect against free radical damage and has potential health promoting properties. In the present study, DPPH (2,2-diphenyl-l-picrylhydrazyl) method was used to analyses antioxidant activity in molokhia leaf samples. The results obtained revealed mean antioxidant activity in molokhia as 32.64±5.36% calculated as % inhibition.

Anahtar Kelimeler

• Corchorus olitorius
• molokhia
• antioxidant activity

Kaynakça

1. Ademiluyi, A.O., Oboh, G., Aragbaiye, F.P., Oyeleye, S.I., Ogunsuyi, O.B., 2015. Antioxidant properties and in vitro a-amylase and a-glucosidase inhibitory properties of phenolics constituents from different varieties of Corchorus spp. Journal of Taibah University Medical Sciences. doi:10.1016/j.jtumed.2014.11.005.
2. Azuma, K., Nakayama, M., Koshioka, M., Ippoushi, K., Yamaguchi, Y., Kohata, K., Yamauchi, Y., Ito, H., Higashio, H., 1999. Phenolic antioxidants from the leaves of Corchorus olitorius L. J. Agric. Food Chem. 47:3963-3966.
3. Batran, R., Al-Bayaty, F., Abdulla, M.A., Al-Obaidi, Hajrezaei, M., Hassandarvish, P., Fouad, M., Golbabapour, S., Talaee, S., 2013. Gastroprotective effects of Corchorus olitorius leaf extract against ethanol-induced gastric mucosal hemorrhagic lesions in rats. J. of Gastroenterology and Hepatology 28(8):1321-1329.
4. Demo, A., Petrakis, C., Kefalas, P., Boskou, D., 1998. Nutrient antioxidants in some herbs and Mediterranean plant leaves. Food Research International 31:351-354.
5. Grubben, G.J.H., 2004. Plant resources of tropical Africa. In: Vegetables. Wageningen, Netherlands: Backhuys, pp:217-221.
6. Kaur, C., Kapoor H.C., 2001. Antioxidants in fruits and vegetables -the millennium’s health. International Journal of Food Science & Technology 36(7):703-725.
7. Oboh, G., Ademiluyia, A.O., Akinyemia, A.J., Henleb, T., Saliua, J.A., Schwarzenbol, U., 2012. inhibitory effect of polyphenol-rich extracts of jute leaf (Corchorus olitorius) on key enzyme linked to type 2 diabetes (a-amylase and a-glucosidase) and hypertension (angiotensin I converting) in vitro. Journal of Functional Foods 4(2):450-458.
8. Öztürk, N., Savaroğlu, F., 2011. Antioxidant activities in Molokhia (Corchorus olitorius). Survival and Sustainability Environmental Earth Sciences, 535-543.

9. USDA, 2015. United States Department of Agriculture Agricultural Research Service National Nutrient Database for Standard Reference Release http://ndb.nal.usda.gov/ndb/foods/show/3016?fg=&man=&lfacet=&count=&max=35&sort=&qlookup=&offset=140&format=full&new=&measureby=
10. Wang, L., Yamasaki, M., Katsube, T., Sun, X., Yamasaki, Y., Shiwaku, K., 2011. Ant obesity effect of polyphenolic compounds from molokheiya (Corchorus olitorius L.) leaves in LDL receptor-deficient mice. European Journal of Nutrition 50:127-133.
11. Yan, Y.Y., Wanga Y.W., Chena, S.L., Zhuanga, S.R., Wanga, C.K., 2013. Anti-inflammatory effects of phenolic crude extracts from five fractions of Corchorus olitorius L. Food Chemistry, 138(2-3):1008-1014.
12. Zeghichi-Hamri, S., Kallithraka, S., Simopoulos, A.P., Rokba, Z.A., Chibane, M., 2006. Chicorium spinosum and Corchorus olitorius as source of antioxidants, fatty acids and minerals. In: Functional Foods for chronic diseases. D&A Inc pp:84-104.