ANTI-NUTRITIONAL CONSTITUENT OF COLOCASIA ESCULENTA ...

MtW MtP EW EP MakW MakP
Figure A3-3: Phytochemical screening for alkaloids in the unprocessed tubers
Key
MtW - Mtubatuba White
EP - Esikhawini Purple
MtP - Mtubatuba Purple
MakW - Makatini White
EW - Esikhawini White
MakP - Makatini Purple
The a1kaloid concentrations in the processed and unprocessed Colocasia esculenta tubers
are shown in Table A3-4c. Total alkaloid concentration for Amadumbe corms ranged
between 0.14 and 0.22 mg/g. Decrease in the alkaloid content during processing was
reflected as ranging up to 79 per cent.
The saponin content, ranging from 0.119 to 0.145 mg/g in Amadumbe tubers, is given in
Table A3-4c. Saponin reduction during processing was found to range between 10 and 64
per cent.
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