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Title: Antagonistic effect of bacteria associated with ascidians from Thoothukudi coast
Authors: Mary, M. Raja Priyanka
Sugumar, G.
Kumar, M. Palani
Chrisolite, B.
Meenakshi, V. K.
Keywords: Ascidian;Antagonistic bacteria;Human pathogen;Shrimp pathogen;Methanol extract
Issue Date: Sep-2016
Publisher: NISCAIR-CSIR, India
Abstract: The antagonistic properties of marine ascidians and the bacteria associated with them were investigated. Ascidians were collected from submerged structures along the coast of Thoothukudi and four species of solitary ascidians and four colonial ascidians were identified. A total of 590 bacterial isolates from the ascidians were characterized up to generic level. All the bacterial isolates were tested for antagonistic property against indicator bacteria and 71 isolates were recognized as potentially antagonistic, however, only 9 of them could effectively inhibit test organisms that included six human and one shrimp pathogenic bacteria. The inhibitory activity of the crude extracts of extracellular products (ECP) of selected antagonistic bacteria was weak against test organisms, but the ethyl acetate crude extracts of both cells and cell free supernatants of antagonistic bacteria showed strong inhibitory activity. Extracts from DS13, DP41 and P19 showed a high degree of inhibition. Methanol crude extract of Eudistoma viride showed good inhibitory activity against Vibrio cholerae and V. harveyi.
Page(s): 1208-1217
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.45(09) [September 2016]

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