Comparative Studies on the Phytochemicals, Nutrients and Antinutrients Content of Cassava Varieties

Authors : Omolara OLUWANİYİ, John OLADİPO

Pages : 661-674

Doi:10.18596/jotcsa.306496

View : 7 | Download : 10

Publication Date : 2017-06-16

Article Type : Research Paper

Abstract :The aim of this research was to investigate and compare the nutritional, antinutritional, and phytochemical composition of two varieties insert ignore into journalissuearticles values(TME 9 insert ignore into journalissuearticles values(olekan–aga); and TME 7 insert ignore into journalissuearticles values(oko–iyawo); ); of Manihot esculenta insert ignore into journalissuearticles values(cassava); tubers at different ages insert ignore into journalissuearticles values(6 months and 12months);. The result of proximate analyses showed that 12-month-old samples of both varieties had higher moisture contents insert ignore into journalissuearticles values(44.3±0.24, 44.7±0.47); compared to the 6-month-old samples insert ignore into journalissuearticles values(34.8±0.62, 37.5±0.71);. A 12-month-old sample of TME 7 had the lowest ash and protein contents of 1.33±0.24 and 2.28±0.21 respectively with highest carbohydrate contents of 90.38±0.7 among the four samples analyzed. The result of mineral analysis revealed that the predominant mineral is Ca insert ignore into journalissuearticles values( 1,209.5 , 1,273.3 , 1,276.8 and 1,178.5 mg/kg); for the 6-month-old TME 9, 12-month-old TME 9, 6-month-old TME 7 and 12-month-old TME 7 respectively);, followed by Na, Fe, and Mg in that order. Quantitative phytochemical analysis showed that the 12-month-old samples have the largest quantity of alkaloids and saponins insert ignore into journalissuearticles values(16.03±1.70, 21.44±0.56 mg/100 g and 4.41±0.31, 3.54±0.25 mg/100 g respectively); for both varieties compared with 11.69±0.43, 12.49±0.53 mg/100 g and 2.39±0.23, 1.84±0.12 mg/100 g recorded for the 6-month-old samples of both varieties. Flavonoids and tannin contents are lower in the 12-month-old samples insert ignore into journalissuearticles values(2.1±0.64, 2.07±0.34 mg/100 g and 0.14±0.03 and 0.13±0.04 mg/100 g); compared with the 6-month-old samples with 3.5±0.57, 3.73±0.19 mg/100 g and 0.22±0.05, 0.21±0.02 mg/100 g respectively. Antinutrient contents - oxalates, cyanogenic glycosides and phytates are high for both species at 12 months while the 6-month-old samples recorded the lowest content. The results suggest that the 6-month-old samples are more desirable in terms of higher nutrient contents insert ignore into journalissuearticles values(especially carbohydrate and energy); as well as lower antinutrient contents.
Keywords : Phytochemicals, nutrients, antinutrients, cassava, varieties