Evaluation of the antibacterial activity of leaf and twig extracts of stout camphor tree, Cinnamomum kanehirae, and the effects on immunity and disease resistance of white shrimp, Litopenaeus vannamei
| Autor: | Chun-Hung Liu, Sheng-Chi Cheng, Ruo-Yun Yeh, Shu-Chiu Shei, Sung-Yan Huang, Ya-Li Shiu, Jiunn-Cheng Lin |
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| Rok vydání: | 2008 |
| Předmět: |
Veterinary medicine
Litopenaeus Aquatic Science law.invention Twig Camphor chemistry.chemical_compound Penaeidae Phagocytosis law Botany Environmental Chemistry Animals Essential oil Vibrio alginolyticus Cinnamomum Respiratory Burst biology Plant Stems Monophenol Monooxygenase Plant Extracts fungi General Medicine biology.organism_classification Immunity Innate Shrimp Anti-Bacterial Agents Plant Leaves chemistry Prawn |
| Zdroj: | Fishshellfish immunology. 27(1) |
| ISSN: | 1095-9947 |
| Popis: | Effects of essential oils and hot-water extracts isolated from leaf and twig of stout camphor tree, Cinnamomum kanehirae on antibacterial activity to pathogen of fish, abalone, marine fish and freshwater prawn, and the white shrimp, Litopenaeus vannamei immunity and disease resistance to Vibrio alginolyticus were carried out in this study. A better antibacterial activity against nine selected pathogen bacteria was recorded in twig essential oil, and the selected pathogens of both Gram-positive bacteria and Gram-negative bacteria were sensitive to the leaf and twig essential oils in the present study. No antibacterial activity was recorded in the hot-water extracts of leaf and twig. In challenge trial, a significant decrease of sensitivity to V. alginolyticus (1 x 10(6) cfu shrimp(-1)) was found in that of shrimp received hot-water extract from twig at the levels of 2 microg g shrimp(-1) compared to control. In addition, the how-water extract of twig in vitro showed greater enhanced effects on phenoloxidase activity, respiratory burst and phagocytosis of white shrimp compared to the hot-water extract of leaf. It is considered that the extracts of stout camphor tree could be a candidate to replace the chemo-therapeutants through the inhibitory effects against the growth of pathogens, and enhanced effects on shrimp immunity and disease resistance. |
| Databáze: | OpenAIRE |
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