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Terrestrial plants: a potent source for isolation of eco-friendly antifouling compounds

DRS at CSIR-National Institute of Oceanography

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Title Terrestrial plants: a potent source for isolation of eco-friendly antifouling compounds
 
Creator Sawant, S.S.
Wagh, A.B.
 
Subject aquatic plnats
fouling organisms
biological poisons
fouling control
bioassays
growth regulators
nutrients (mineral)
isolating mechanisms
Acacia pennata
Barringtonia acutangula
 
Description All over the world efforts are oriented towardes isolation of eco-friently antifouling toxins from marine plants and organisms. Consequently number of compounds having antifouling properties have been identified from marine plants and organisms by number of workers in the past. However, little attention is paid towards terrestrial plants. In light of this some selected plants have been screened for antifouling activity. These plants are Acacia pennata and Barringtonia acutangula. These plants are being used by fishermen for narcotising and thus catching fish for their consumption purpose. With the extract of these plants, antifouling assays were conducted in the laboratory against four fouling diatoms, barnacle larvae and adult mussels. The estimated Ec sub(50) values for diatoms ranged between 8.9-125 mu g/ml, whereas, for barnacles larvae and musssels the Ec sub(50) values ranged between 78.8-35.8 mu g/ml and 5.9-27.3 mu g/ml respectively. Attempts were also made to assess the Ec sub(100) of the crude extracts on the nutrient uptake by the diatoms. It has been observed that the diatom cells in the growth medium containing Ec sub(100) were unable to utilise the nutrients such as silicate and nitrate from the surrounding medium which resulted in the inhibition of growth. One compound each of A. pennata and B. acutangula was isolated by following Preparative Thin Layer Chromatography technique. Partial characterization of these active principals indicated the presence of various functional groups. These groups include alphatic, amide, vinyl, methyl, hydroxyl, ketone, aromatic, ether etc. The isolated compounds were bioassayed usin N. subinflata and barnacle larvae. The Ec sub(50) values of the compound from A. pennata for the diatoms and barnacle larvae were 16.5 and 10.2 mu g/ml respectively. The Ec sub(50) values of the isolated compounds from B. acutangula for the diatom and barnacle larvae were 9.8 and 7.8 mu g/ml respectively
 
Date 2009-01-12T09:27:01Z
2009-01-12T09:27:01Z
1997
 
Type Conference Article
 
Identifier Proc. of US-Pacific Rim Workshop on Emerging Nonmetallic Materials for the Marine Environment, 3.37-3.52p.
http://drs.nio.org/drs/handle/2264/2074
 
Language en
 
Rights Copyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher US Office of Naval Research