Diplazium sammatii: Athyraceae (‘Nyama Idim’): Age-related nutritional and antinutritional analysis


Tender and mature leaflets and leaves of Diplazium sammatii (‘Nyama idim’), were separately investigated for their nutritional and antinutritional properties. Results showed little difference in proximate nutritional contents between tender and mature leaves, except for crude fat, which was present in levels 1.5 times higher in younger than in older leaves. Crude fiber levels were low. Zinc (Zn) and copper (Cu) were higher in younger leaves (6.8 and 3.5 mg/100 g dry matter, respectively, compared to 4.5 and 2.5 mg/100 g dry matter, respectively in older leaves). Older leaves contained higher levels of iron (Fe): 6.7 mg/100g dry matter, in comparison to 4.3 mg/100 g dry matter, in young leaves. Oxalate levels were slightly higher in younger than older leaves. However, the reverse was true for tannin content. Both antinutritional compounds were present in levels which should be safe.

Key words: Antinutrients, D. sammatii, Leaf maturity, Minerals, Proximate composition


The Authors of this Article are:
M.E. BASSEY(1), E.U.I. ETUK(2), M.M. IBE(2) and B.A. NDON(3)
1- Department of Botany, Horticulture and Microbiology;
2- Department of Chemistry and Biochemistry;
3- Department of Agriculture, University of Uyo, Uyo – AKS Nigeria

Prof. Margaret Bassey

Professor Margaret E. Bassey is a Professor of Bio-Systematics in the Department of Botany and Ecological Studies, University of Uyo. She obtained her B.Sc from the University of Benin, M.Sc from the University of lbadan and Ph. D from the University of Port Harcourt.

She was trained by Seasoned Taxonomists like the Late Prof L..S. Gill and Dr Joyce Lowe. She did extensive biosystematic investigations of ferns of the family Adiantaceae for her Ph.D under Professor B. L. Nyananyo and Professor B. Okoli and she has maintained her interest in ferns since then.

The University of Uyo Herbarium which she oversees has a good collection of ferns of Akwa lbom State from all the 31 Local Government Areas.

She is author of the book, About Seed Plants and has many articles in national and international journals, many of which can be accessed on this knowledgebase.

She enjoys identifying unknown plants and is happily married to Pastor Emmanuel Bassey of the The R.C.C.G and together, they have been blessed with 4 wonderful children.

Visit www.margaretbassey.com.ng to access all her open access publications.

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