Morpho-physical and Nutritional Characterization of Seeds and Tubers of Sphenostylis stenocarpa (hochst ex a. Rich.) Harms



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morphophysical-and-nutritional-characterization-of-seeds-and-tubers-ofsphenostylis-stenocarpa-hochst-ex-a-rich-harms



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Der Chemica Sinica, 2017, 8(2):261-268
ISSN : 0976-8505
CODEN (USA): CSHIA5
Pelagia Research Library
261
Morpho-physical and Nutritional Characterization of Seeds and Tubers of 
Sphenostylis stenocarpa (hochst ex a. Rich.) Harms
Wilfried Zanmenou* and Pierre Dossou- ovo
Food Chemistry Unit, Research Laboratory for the Treatment and Conservation of Fishery Products, Faculty of Sciences and 
Techniques, Abomey-Calavi University, Republic of Benin
ABSTRACT
Comparative study of the morpho-physical characteristics of two varieties of seeds of Sphenostylis stenocarpa and the 
evaluation of the nutritional potential of seeds and tubers revealed significant differences in seed density and color. 
Black seeds are less bulky and denser (1.5 g/mm
3
) than brown seeds (1.2 g/mm
3
). Seeds are richer in protein (23% 
and 27%) and fat (2%) than tubers (8-10 and 0.8-0.5%) while the last-mentioned are richer in starch (85%). Splitting 
of the fibers shows that the seeds are rich in soluble fibers at a high molecular weight while the tubers are rich in 
insoluble fibers. Sequential splitting of proteins reveals that salino-soluble and glutelin are the predominant protein 
groups of seeds and tubers of Sphenostylis stenocarpa. In regard to the salino-soluble, globulins are in the majority 
in seeds (38-41%) contrary to tubers (3%), and the last-mentioned are richer in albumins (44-56%) than seeds (1, 
2-8%). Glutelin G2 and G3 are more concentrated in seeds (30-37%) than tubers (12%). Prolamins are present only 
in trace form in both organs..

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