CHANGES IN NITROGEN-METABOLISM ENZYME-ACTIVITIES OF VICIA-FABA IN RESPONSE TO ALUMINUM AND CADMIUM

被引：4

作者：

SHALABY, AM ^{[1
]}

ALWAKEEL, SAM ^{[1
]}

机构：

[1] CAIRO UNIV,FAC SCI,DEPT BOT,GIZA 12613,EGYPT

来源：

BIOLOGIA PLANTARUM | 1995年 / 37卷 / 01期

关键词：

FABA BEAN; GLUTAMATE-OXALOACETATE TRANSAMINASE; GLUTAMATE-PYRUVATE TRANSAMINASE; HEAVY METALS; NITRATE REDUCTASE; NODULES;

D O I：

10.1007/BF02913004

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Nodules of faba bean (Vicia faba L. cv. Giza 3) plants grown in pots containing clay-loam soil for 90 d have an active nitrate reductase (NR), while the leaves did not show detectable activity. Spraying the plant with increasing concentrations of Al3+ or Cd2+ (0 - 1000muM) significantly inhibited the nodules NR activity, the decline being more pronounced in Cd2+ treatment. The specific activity of glutamate-oxaloacetate transaminase (GOT) and glutamate-pyruvate transaminase (GPT) were more prominent in the 60- than in 90-d-old plants; GOT was always higher than GPT. Furthermore, GOT was more sensitive to Al3+ and Cd2+ treatments and its activity was significantly decreased when the metal concentration increased. Also, Cd2+ proved to be more effective than Al3+ in suppressing the GOT activity in the nodules, with less significant effect observed in the leaves. In contrast, GPT was hardly affected by the various metal treatments, particularly in the leaves.

引用

页码：101 / 106

页数：6

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