Document Detail


Physiological and biochemical responses of Synechococcus sp. PCC7942 to Irgarol 1051 and diuron.
MedLine Citation:
PMID:  22789406     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Cyanobacteria are prokaryotic algae found in oceans and freshwaters worldwide. These organisms are important primary producers in aquatic ecosystems because they can provide essential food for grazers and herbivores. In this study, the physiological and biochemical responses of the freshwater cyanobacterium Synechococcus sp. PCC7942 to two organic booster biocides Irgarol 1051 and diuron were compared and evaluated using 96h growth tests in a batch-culture system. The 96h median effective concentrations (EC(50)) were 0.019 and 0.097μmolL(-1) for Irgarol 1051 and diuron, respectively, which indicate that Irgarol 1051 is about 5 times more toxic than diuron to cyanobacteria. Moreover, remarkable physiological and biochemical responses occurred in the Irgarol 1051 and diuron treatments. Irgarol 1051 and diuron stimulated cyanobacterial growth, increased the soluble protein content, and enhanced the catalase (CAT) activity at low concentrations, but inhibited them at high concentrations. However, the malondialdehyde (MDA) and polysaccharide content of the cyanobacteria were only significantly affected by Irgarol 1051. These observations suggest that Irgarol 1051 and diuron are toxic to Synechococcus sp. PCC7942, and their use should be restricted in maritime industries.
Authors:
Xiangyuan Deng; Kun Gao; Junlong Sun
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-26
Journal Detail:
Title:  Aquatic toxicology (Amsterdam, Netherlands)     Volume:  122-123C     ISSN:  1879-1514     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-7-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8500246     Medline TA:  Aquat Toxicol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  113-119     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
Affiliation:
School of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212018, China.
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