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Effect of alcohol extracts of demospongiae on growth of periphytic diatoms

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Title Effect of alcohol extracts of demospongiae on growth of periphytic diatoms
 
Creator Wilsanand, V
Wagh, A B
Bapuji, M
 
Description 274-279
Antifouling potentialities of alcohol extracts of demospongiae, collected of
east coast of India,
against four dominant marine fouling diatoms are reported. Of the 20
combinations worked out (5 sponges × 4 diatoms) 16 interactions showed activity
accounting to about 80%. Plakortis simplex, Azorica pfeifferae and Decitopsis
sp. showed 100% growth inhibition against all the 4 fouling diatoms (Navicula
sbinflata, Navicula crucicula, Nitzschia sp., Amphora sp.) tested, imp
lying the presence of potent antifouling compounds whilst, other extracts
showed species specificity in their action. However, the same cells exhibited
normal growth , when transferred to extract free media, pointing towards non toxic
way of action . The EC50 values varied with extracts and test
organisms used and ranged from 14 mg/ml (A. pfeifferae vs N. Crucicula)
to 583 μg/ml (Dercitopsis sp. vs
Amphora sp.). The active extracts totally arrested the silicate uptake on
diatoms, treated with EC100 values, in relation to control. The degree
of silicate uptake impairment varied with extracts and test organisms used. The
results imply the possible potentialities of these extracts in controlling the
microfoulers.
 
Date 2014-01-13T06:07:34Z
2014-01-13T06:07:34Z
1999-09
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25545
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.28(3) [September 1999]