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Effect of aluminum on growth and nitrate reductase activities of maize seedlings

Liu Baoguo, Sukalovic V H-T

Department of Agronomy,Southwest Agricultural University.Chongqing 400716

Abstract

The presence of Al inhibited the growth of maize roots, decreased the pH of nutrient solution and in vitro activities of NADH-and NAD(P) H-nitrate reductases were reduced in the leaves of VA35 and to a lesser degree in SC704, whhile the activities in roots of both genotypes were increased, with an exception of the specific activity in the root of VA35. Higher activity of nitrate reductase in root and the ability to maintain higher NR activity in Al-tolerant genotype SC704 under Al stress indicate that nitrate reductase may be involved in the mechanism of detoxification by plant tissue. NAD(P) H-NR may play a more important role in nitrate assimilation under Al stress.

Key words: Alumimum;Maize;Growth;Nitrate reductase

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Citing This Article：

Liu Baoguo, Sukalovic V H-T. Effect of aluminum on growth and nitrate reductase activities of maize seedlings. Acta Physiol Sin 1998; 50 (4): (in Chinese with English abstract).