Skip to main content
Log in

Coumarin compounds in cassava diets: 2 health implications of scopoletin in gari

  • Published:
Plant Foods for Human Nutrition Aims and scope Submit manuscript

Abstract

Scopoletin has been isolated and identified in gari, a cassava food consumed in Nigeria (West Africa). Its levels in gari and cassava flour is not altered by post processing treatments such as sundrying, refrigeration and storage. Scopoletin has also been identified as an active principle in the traditional herbal infusion of the fruit ofTetrapleura tetraptera TAUB used in the ethnopharmacology of West Africa. It is a potent hypotensive and non-specific spasmolytic agent. These pharmacological effects of Scopoletin are probably the underlying factors in the slowly developing tropical neuropathy characterised by optic atrophy, nerve deafness and ataxia endemic among populations subsisting on cassava diets such as gari. Hitherto, these toxicities were attributed to cyanogenic glucosides (cyanide) present in cassava.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Nartey F (1966) Aflatoxins ofAspergillus flavus grown on cassava. Physiol Plant 19: 818–822

    Google Scholar 

  2. Purchio A (1972) Search for AFB1 and similar fluorescent compounds in Brazillian Cassava flour. Rev Microbiol 3(3): 121–125

    Google Scholar 

  3. Nagarjan V, Tulpule PG, Bhat RV (1973) Aflatoxin-like factors in Tapioca (Manihot utillissima). Environ Physiol Biochem 3(1): 13–18

    Google Scholar 

  4. Rickard JE (1981) Study of the production of xylem occlusions and Scopoletin in cassava roots in response to injury. R Microsc Sco Proc 16: 249

    Google Scholar 

  5. Uritani I, Data ES, Tanaka Y (1982) In: Bioresources investigation on production, storage, processing and vegetation of root crops in the tropics. Uritani I, and Reye ED (ed), Nagoya University Co-op; Nagoya, pp. 32

    Google Scholar 

  6. Flores DM, Garcia VV, Uritani I (1983) The relationship between methods of making cassava flour and coumarin formation during drying. J Jpn Soc Food Sci Tech 30(3): 175–177

    Google Scholar 

  7. Obidoa O, Lekwuwa O (1985) Research Notes

  8. Rickard JE (1985) Physiological deterioration of cassava roots. J Sci Food Agric 36: 167–176

    Google Scholar 

  9. Sakai T, Nakagawa Y, Uritani I, Data ES (1986) Occurence of various kinds of metabolites in physiological and microbially damaged cassava (Manihot esculenta Crantz). Agric Biol Chem 50:(11) 2905–2907

    Google Scholar 

  10. Tanaka Y, Data ES, Lape VG, Villegas CD, Gorgonio M, Hirosed S, Uritani I (1984) Effect of pruning treatment on physiological deterioration in cassava roots. Agric Biol Chem 48(3): 739–743

    Google Scholar 

  11. Obidoa I, Obasi S (1989) Laboratory investigations on fluorescent compounds in Nigerian staple diets. Unpublished data

  12. Uritani I, Data ES, Villegas RJ, Flores RJ Hirose S (1983) Relationship between secondary metabolism changes in cassava roots tissue and physiological deterioration. Agric Biol Chem 47(7): 1591–1598

    Google Scholar 

  13. Garcia VV, Lapitan OB, Flores DM, Uritani I (1984) Changes in coumarin and phenol content and peroxidase activity as affected by drying methods for cassava root slices and their relation to food quality. Trop. Root Crops: Post harvest physiology and processing 7: 299–309

    Google Scholar 

  14. Wheatley CC (1982) Studies on cassava root post-harvest physiological deterioration. Ph.D Thesis, University of London, 246 pp

  15. Rickard JE, Coursey DG (1981) Cassava storage. Part I: storage of fresh cassava roots. Trop Sci, 23: 1–32

    Google Scholar 

  16. Obasi SC (1990) In comparative effects of scopoletin and AFB on Bovine R.B.C. and hepatic mitochondrial respiration. Ph.D Thesis, University of Nigeria, Nsukka.

    Google Scholar 

  17. Taniguchi T, Data ES (1982) In: Uritani I, Reyes ED (ed), Bio-Resources investigation on production. Storage, processing and vegetation of root crops in the tropics (1981 — Interim report) Nagaoya University co-operation. Nagoya pp. 22–31

    Google Scholar 

  18. Lockwood RB (1969) Poisonous food for millions. Pacific Discovery 22(3): 28–31

    Google Scholar 

  19. Dorozynski A (1978) Cassava may lead to mental retardation Nature 272: 121

    Google Scholar 

  20. Herbert VC (1988) In modern nutrition in health and disease, 7th Edition. ME Shils, UR Young (eds), Lea and Febiger, 471

  21. Way JL (1984) Cyanide intoxication and its mechanism of antogonism. Ann Rev Pharmacol Toxicol 24: 451–481

    Google Scholar 

  22. Money GL (1958) Endemic neuropathies in the Epe district of southern Nigeria. West Afr Med J. 7: 58–62

    Google Scholar 

  23. Osuntokun BO, Durowoju JE, McFarlene H, Wilson J (1968) Plasma amino acids in the Nigerian nutritional ataxic neuropathy. Br Med J 3: 47–649

    Google Scholar 

  24. Ononogbu IC, Emole I (1978) The effects of gari on rat plasma cholesterol. Artherosclerosis 31: 101–104

    Google Scholar 

  25. Coursey DG, Haynes PN (1970), World crops July/Aug. 261–265

  26. Onyeneke EC (1984) Effects of gari diet on plasma phospholipids. Nutrition Reports International 29(4): 775–781

    Google Scholar 

  27. Chilaka FC, Anosike EO, Obidoa O (1985) Effects of high and prolonged gari diets on some microsomal enzyme activities of rat liver, Plant Fd Hum Nutr 35(2): 159–164

    Google Scholar 

  28. Obidoa O, Ngodo VOS (1984) Effect of prolonged consumption of gari (cassava,Manihot Utillisima) on rat hepatic energy metabolism. Plant Fd Hum Nutr 34: 159–168

    Google Scholar 

  29. Ezeala DO, Okoro N (1986) Processing techniques and hydrocyanic acid content of Casava-based human food stuff in Nigeria. J Fd Biochem 10(2): 125–132

    Google Scholar 

  30. Adesina SK, Ojewole JA, Marquis VO (1981) Afric J Med Plants 4: 27, cited in ref. 33 Cardiovascular and neuromuscular actions of Scopoletin from the fruit ofTetrapleura tetraptera. Plant Med. 49: 99–102

    Google Scholar 

  31. Dalziel JM (1985) In: The useful plants of West Tropical Africa. London Crown Agents for Overseas Governments and administation cited in ref. 33 Cardiovascular and neuromuscular actions of Scopoletin from the fruit ofTetrapleura tetraptera. Plant Med 49: 99–102

    Google Scholar 

  32. Elewude JI (1978) Communication cited in ref. 33

    Google Scholar 

  33. Ojewole JAO, Adesina SK (1983a) Cardiovascular and neuromuscular actions of Scopoletin from the fruit ofTetrapleura tetraptera. Plant Med. 49: 99–102

    Google Scholar 

  34. Ojewole JAO, Adesina SK (1981) Cited in ref 35.

    Google Scholar 

  35. Ojewole JAO, Adesina SK (1983b) Mechanism of the Hypotensive effect of Scopoletin isolated from the fruit ofTetrapleura tetraptera. Plant Med 49: 46–50

    Google Scholar 

  36. Obasi SC, Obidoa O (1989) Coumarin compounds in cassava, yam, cocoyam and maize: 1. Preliminary studies on blood coagulation and binding to erythrocyte, and hemoglobin. In: Book of abstracts of the 14th annual conference of the Biochemical Society of Nigeria pp. 11

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Obidoa, O., Obasi, S.C. Coumarin compounds in cassava diets: 2 health implications of scopoletin in gari. Plant Food Hum Nutr 41, 283–289 (1991). https://doi.org/10.1007/BF02196398

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02196398

Key words

Navigation