Abstract
ABSTRACT The effect of excess nickel (as NiSO4) on starch mobilization of rice (Oryza sativa L.) grains or dehulled rice grains during germination was investigated. Excess NiSO4 had no effect on starch content and α-amylase activity in endosperm of germinating rice grains or germinating dehulled rice grains. Evidence is provided to show that the hull is a barrier against influx of Ni2+ to endosperm; endosperm per se is less effective in Ni2+ uptake; and α-amylase extracted from the endosperm of germinating rice grains is highly resistant to excess Ni2+.
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