NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.32 [2003] >
IJMS Vol.32(4) [December 2003] >


Title:  Chemical defense in ascidians Eudistoma viride and Didemnum psammathodes in Tuticorin, southeast coast of India: Bacterial epibiosis and fouling deterrent activity
Authors: Ramasamy, M. Santhana
Murugan, A.
Keywords: Antifouling
ascidian
biofilm
Didemnum psammathodes
epibacteria
Eudistoma viride
Issue Date: Dec-2003
Publisher: CSIR
Abstract: The culturable epibacterial abundance in the ascidians Eudistoma viride and Didemnum psammathodes was studied and correlated with their antifouling activity. The epibacterial abundance varied significantly between E. viride and D. psammathodes. The antibacterial assay of the crude extracts of the ascidians showed inhibitory activity against all the 20 biofilm bacteria. However, E. viride showed prominent antibacterial activity than that of D. psammathodes with an average inhibition zone of 29.1 mm. The comparison between epibacterial abundance and the antifouling activity showed an interesting significant negative correlation [-0.910 (P<0.001)]. Though the ascidians showed activity against all biofilm bacteria, the presence of epibacteria still on its surface could be attributed to their selective inhibition against certain bacteria due to chemical defense mechanism or the ascidians may exhibit a surface property suitable for particular epibacteria which may be symbiotic and contribute to the reduced abundance of other bacterial epibionts.
Page(s): 337-339
ISSN: 0379-5136
Source:IJMS Vol.32(4) [December 2003]

Files in This Item:

File Description SizeFormat
IJMS 32(4) 337-339.pdf36.34 kBAdobe PDFView/Open
 Current Page Visits: 718 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 510623 since 06-Feb-2009  Last updated on 11-Apr-2014Webmaster: nopr@niscair.res.in