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Cyanobacterial diversity from seven mangrove environments of Kerala, India

100%

Ram A. T. , Shamina M.

World News of Natural Sciences

2017

tom 9

91-97

A survey on the cyanobacterial biodiversity of 7 mangrove environments viz. Vallikunnu, Kadalundi, Kallayi, Mangalavanam, Kumbalam, Kumarakom and Mekkara mangroves of Kerala was undertaken during 2014-2016. In total, 31 species of cyanobacteria coming under 10 genera and 4 families were recorded in all mangrove environments. Maximum species (13 species) of cyanobacteria were recorded from Kadalundi, whereas the minimum was recorded from Mangalavanam (2 species). The genus Oscillatoria was observed with maximum distribution (13 species), followed by Nostoc (5 species) and Lyngbya (3 species). The genus Aphanocapsa, Microcoleus and Scytonema (2 species each) and Chroococcus, Aphanothece, Merismopedia, and Phormidium (1 species each) shows equal distribution. As many as three species, namely Oscillatoria salina, Oscillatoria ornata and Oscillatoria vizagapatensis were common in all mangrove environments except Mangalavanam and Mekkara.

Chromatographic identification of two biologically important triterpenoids from the chloroform extract of Rhizophora mucronata

88%

Hridya V. K. , Godson P. S. , Chandrasekar N.

Acta Chromatographica

2012

tom Vol. 24, no. 1

123--129

Mangroves are the source of several bioactive secondary metabolites and have proven activity against human, animal and plant pathogens. Rhizophora mucronata is a mangrove species belonging to the family Rhizophoraceae. Betulin and lupeol are two naturally occurring pentacyclic triterpenoids having excellent biological properties. Chloroform extract of R. mucronata, collected from Pitchavaram, Muthupett and Manakudy regions of Tamilnadu, was chromatographed on silica gel 60F254 plates with nhexane and ethyl acetate (80:20) (v/v) as the mobile phase. Derivatizations were done using anisaldehyde and sulfuric acid reagents. The triterpenoids such as betulin and lupeol were identified through HPTLC method. This is the first report for the thin layer chromatographic (TLC) identification of triterpenoids such as betulin and lupeol from R. mucronata, which will be the most valuable information to identify the antimalarial and antiviral activities.