CHANGES IN ANTIOXIDATIVE ENZYMES OF A CYANOBACTERIUM GROWN UNDER HEAVY METAL STRESS

被引：2

作者：

Chaneva, G. ^{[1
]}

Petrova, D. ^{[1
]}

Uzunova, A. ^{[1
]}

机构：

[1] Sofia Univ St Kl Ohridski, Dept Plant Physiol, Sofia 1164, Bulgaria

来源：

BIOTECHNOLOGY & BIOTECHNOLOGICAL EQUIPMENT | 2009年 / 23卷

关键词：

catalase; glutathione peroxidase; pigments; Plectonema;

D O I：

10.1080/13102818.2009.10818485

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The effect of Cu and Cd ions on the cyanobacterium Plectonema boryanum Gom. was studied. Growth rate of algal biomass was strongly inhibited by cadmium - it was 50 % reduced at 200 mu M CdCl2, while copper added into the nutrition medium caused just about 20% reduce of growth. Chlorophyll a content decreased at the same extent after Cu and Cd treatment - it was 35% lower than the control variants. Carotenoids were almost unaffected after Cu exposure but Cd led to a slight decrease of 15% as compared to control. The activities of antioxidative enzymes catalase (CAT) and glutathione peroxidase (GPER) were strongly increased following the increase of Cu concentration - they reached 100% and 180% above the control, respectively. Cd provoked 58% decrease of CAT activity and a slight enhancement of GPER at concentration 200 mu M CdCl2. Glutathione reductase (GR) activity was not detected in algal cells of the all experimental variants

引用

页码：554 / 556

页数：3

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