TAILIEUCHUNG - Antagonistic potential of marine Actinobacteria against fish and shellfish pathogens

A total of 94 marine actinobacterial isolates were found to be associated with 4 sponges: Callyspongia diffusa, Mycale mytilorum, Tedania anhelans, and Dysidea fragilis. Among the cultures 7 strains showed antagonism against fish and shellfish sh pathogens. | S. DHARMARAJ Turk J Biol 35 (2011) 303-311 © TÜBİTAK doi: Antagonistic potential of marine Actinobacteria against fish and shellfish pathogens Selvakumar DHARMARAJ Department of Aquatic Biology and Fisheries, University of Kerala, Kariavattom campus, Trivandrum 695 581, Kerala - INDIA Received: Abstract: A total of 94 marine actinobacterial isolates were found to be associated with 4 sponges: Callyspongia diffusa, Mycale mytilorum, Tedania anhelans, and Dysidea fragilis. Among the cultures 7 strains showed antagonism against fish and shellfish pathogens. Analysis of morphological, physiological, biochemical, and protein profile characteristics suggested that the actinobacterial strains belonged to the genus Streptomyces. The initial screening of the isolates by the spot inoculation method exhibited antibacterial activity against Aeromonas hydrophila. In vitro screening of the submerged culture extracts showed positive inhibition against the fish and shellfish pathogens Aeromonas hydrophila, Serratia sp., and Vibrio spp. The screening of bioactive compounds by UV spectrum confirmed the production of polyene substances, which resulted in absorbance peaks ranging from 225 to 245 nm. In TLC analysis the Rf values ranged from to . The results indicate that the Streptomyces strains isolated from marine sponges produce potential bioactive compounds against fish and shellfish pathogens. Key words: Marine sponges, Actinobacteria, Streptomyces, bioactive compounds, fish and shellfish pathogens Introduction Marine microorganisms are of considerable interest as a new and promising source of biologically active compounds (1). They produce a variety of metabolites, some of which can be used for drug development (2). Marine Actinobacteria is a very important group of bacteria that has considerable value as a prolific producer of antibiotics and other therapeutic compounds. Actinobacteria produce over half of the bioactive compounds in .

• Sinh học
• Marine sponges
• Bioactive compounds
• Fish and shellfish pathogens
• Casein starch peptone yeast extract
• Analysis of morphological
• Journal of Science and Technology
• Microorganisms asscociated with three marine sponges
• Mien trung sea of Viet Nam
• Sponge associated microorganism
• Especially in NT sponge
• Alginate lyase
• Seaweed polysaccharides
• Brown seaweed polysaccharide degrading activities
• Isolation of marine bacteria
• Identify the potential strains
• Cytotoxic activity
• Marine fungi
• Anticancer compounds
• Pharmaceutical values
• Human cancer cell lines
• Cervical cancer
• Report medicine
• traditional medicine
• scientific reports
• oxidation
• Crystal structure
• bacteria
• Punica grantum
• Different morphological traits
• Morphological traits of pomegranate
• Morphological characterization
• Analysis of Variance
• Fruit characteristics
• Germplasm morphological culm branching
• Genetic analysis
• Barnyard millet
• Germplasm collected
• Uttarakhand hills
• Morphological traits
• Genetic divergence
• Relationship analysis
• Okra (Abelmoschus esculentus L Moench )
• Inbred lines
• Genetic diversity
• Cluster analysis
• Maize (Zea mays L )
• Basis of morphological traits
• Genetic variation
• Agro morphological traits
• Multivariate analysis
• Principal component analysis
• Canonical vector analysis
• Morphological and quality traits
• Various forage sorghum genotypes
• Genotypes (Sorghum bicolor L Moench)
• Variation in morphological
• Biochemical characters
• Mahalanobis D2 statistics
• Genetic diversity analysis
• Okra genotypes
• Morphological markers
• Ornamental tomato breeding
• Principle component analysis
• Morphological variation among 24 tomato
• Ornamental breeding in Vietnam
• Gossypium hirsutum L
• Cotton germplasm
• Agro morphological characterization
• Character association analysis
• Genetic resources
• Mulberry genetic resources
• Agro morphological markers
• Trait association analysis
• Agromorphological charaters
• Agro morphological characters in wheat
• Agro morphological characters
• Wheat genotypes for yield
• Yield components
• Morphological and biochemical evaluation
• Selected almond
• High morphological diversity
• Almond genotypes
• Pointwise Prediction for Robust
• Adaptable Japanese Morphological Analysis
• Graham Neubig
• báo cáo khoa học
• báo cáo ngôn ngữ
• ngôn ngữ tự nhiên
• Unsupervised Lexicon Based
• Resolution of Unknown Words
• Full Morphological Analysis
• xử lý ngôn ngữ tự nhiên
• Morphological Analysis of a Large Spontaneous Speech
• Corpus in Japanese
• Kiyotaka Uchimoto
• mô hình ngôn ngữ
• Use of Mutual Information
• Character Clusters
• Dictionary less Morphological Analysis of Japanese
• Machine Aided Error Correction Environment
• Korean Morphological Analysis
• Part of Speech Tagging
• Memory Based Morphological Analysis
• Long Papers
• Workshops
• COMPUTER METHODS
• MORPHOLOGICAL ANALYSIS
• Roy J
• Byrd
• Judith L
• Klavans
• model language
• process natural language
• Semitic Morphological Analysis
• Generation Using Finite State Transducers
• Feature Structures
• A Morphological Analysis Based Method
• Spelling Correction
• KNOWLEDGE ENGINEERING
• Aarno Lehtola
• Analysis of Unknown Words
• Morphological Decomposition
• Alan W Black Joke
• Cereal annual crop
• Oat (Avena sativa L
• Forage yield
• Genetic analysis for forage yield
• Morphological traits of seed in oat
• Trichoderma isolates
• Tobacco growing regions
• Godavari district
• Based on sequence analysis
• Region of RDNA and morphological variations