Frontiers of Agricultural Science and Engineering
>> 2015,
Volume 2,
Issue 4
doi:
10.15302/J-FASE-2015078
RESEARCH ARTICLE
Antibacterial properties of extracts of
1. College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225000, China.2. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225000, China
Accepted: 2015-12-28
Available online: 2016-01-19
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Abstract
Canadian goldenrod ( ) is one of the most destructive invasive weeds in South-eastern China. To evaluate its potential application as dietary supplement in red swamp crayfish ( ), the antibacterial properties of aqueous and ethanol extracts of this plant against three major pathogenic bacteria in crayfish aquaculture were examined. Inhibition zone tests and determination of minimum inhibitory concentration revealed that the extracts had lower antibacterial activity than extracts from two traditional medicinal plants that possess antibacterial properties, garlic ( ) and cortex phellodendri ( ). However, they did exhibit greater antibacterial effects than extracts from another widely used medicinal plant, , and an aquatic weed, . Aqueous extracts of Canadian goldenrod gave greater inhibition than the ethanol extracts. Crayfish fed a diet with 2% these aqueous extracts exhibited significantly higher enzyme activity of alkaline phosphatase, catalase and phenoloxidase ( <0.05). Based on the results of this study, we conclude that aqueous extracts of Canadian goldenrod are highly promising for the development of new dietary supplement for use in crayfish aquaculture.
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