EFFECTS OF ALUMINIUM TOXICITY ON SOME BIOCHEMICAL COMPONENTS OF RICE (ORYZA SATIVA L.)

Abstract

An experiment was conducted to investigate the effect of aluminium (Al)
toxicity on reducing and total sugar, proline, total amino acid and protein in rice
seedlings grown in solution culture and phenolic compounds, chlorophyll and
carotenoids in rice plants grown in sand culture. Exposure of rice seedlings to
different concentrations of aluminium (10 - 150 μM) led to a stimulation of
reducing and total sugar in the root and the shoot. Similarly, Al stress increased
proline and total amino acid contents in different parts of rice seedlings.
Aluminium toxicity caused a significant increase in phenolic compounds in rice
plants. On the other hand, aluminium stress resulted in a reduction of
chlorophyll-a, chlorophyll-b and carotenoid contents in the leaves of rice plants.