Physico-chemical and antinutritional attributes of gamma irradiated Vigna unguiculata (L.) Walp. subsp. unguiculata seeds
2012
Tresina, P. S. | Mohan, V. R.
Effect of gamma irradiation on Vigna unguiculata subsp. unguiculata seeds (black coloured seed coat) at various doses (2, 5, 10, 15 and 25 kGy) on the physico-chemical characteristics, proximate composition, vitamins (niacin and ascorbic acid) and antinutritional factors were investigated. No significant changes were observed in the physico-chemical characteristics of irradiated seeds. Gamma irradiation resulted in a significant increase of crude protein at all doses, while the crude lipid, crude fibre and ash content showed a dose dependent decrease. Raw seeds were rich in vitamins (niacin and ascorbic acid); when the seeds were irradiated, significantdecreases were reported. Irradiation processing significantly reduces the levels of L-DOPA, phytic acid, hydrogen cyanide, trypsin inhibitor activity, oligosaccharides and phytohaemagglutinating activity. Total free phenolics, tannins and in vitro protein digestibility showed significant dose dependent increase. As irradiation is a physical and cold process, it may be ideal and emerge as an important technique to improve the nutritionalquality of legume seeds and its products.
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