Metabolites and bioactivities of Rhizophoraceae mangroves

This review examines the chemical compositions and bioactivities of mangrove plants belonging to the Rhizophoraceae family.The Rhizophoraceae family of true mangrove plants is the most common and is also widely distributed species.It consists of 24 species across four genera.Of the 24 species,12 species remain unexamined for their phytochemical constituents.There have been 268 metabolites reported from 16 species.The key phytochemical constituents identified across the family are the diterpenoids and triterpenoids.The major diterpenoids include pimaranes,beyeranes,kaurenes,dolabranes and labdanes whereas the significant triterpenoids are lupanes,dammaranes and oleananes.Disulphides,dolabranes and labdanes are considered to be the chemotaxonomic markers of the genera Bruguiera,Ceriops and Rhizophora respectively.

Two new tremulane sesquiterpenes from a mangrove endophytic fungus,Coriolopsis sp.J5

Two new tremulane sesquiterpenes coriolopsin A（1） and coriolopsin B（2）,together with two known ones conocenol C（3） and ceriponol E（4）,were isolated from the fermentation extract of endophytic fungus Coriolopsis sp.J5 from Ceriops tagal.The structures and absolute configuration of compounds 1 and 2 were determined based on HR-ESI-MS and spectroscopic data（IR,UV,1D,2D NMR and X-ray crystallographic analysis）.

Exploration of mangrove‑associated actinobacteria from South Andaman Islands,India

In this study,a total of 1125 actinobacteria were isolated from the selected mangrove species:Avicennia marina,Rhizopora mucronata and Ceriops tagal from three study stations viz.,Minnie Bay,Carbyn’s Cove and Burmanallah.Among these three stations,the highest number of actinobacteria was recorded in Carbyn’s Cove(64.97%),followed by(25.51%)at Burmanallah and the minimum of(9.51%)was recorded in Minnie Bay.Maximum number of actinobacteria was recorded from Ceriops tagal(40.44%)than the other selected mangrove species Avicennia marina(34.13%)and Rhizopora mucronata(25.42%).Among the 1,125 mangrove-associated actinobacteria,103 morphologically different isolates from the Minnie Bay station was selected for the further characterization studies.In antibacterial assay,30.11%of the isolates revealed inhibitory activ-ity against all tested clinical pathogens and 65%isolates displayed inhibitory activity against minimum of 04 tested clinical pathogens.Growth survival studies of the actinobacterial isolates also accomplished to withstand in varied NaCl and pH levels.Of 103 isolates,all were found to synthesize gelatinase enzyme,73 isolates demonstrated amylolytic activity,38 isolates exhibited proteolytic and 63 isolates displayed urease activity.Interestingly,56 isolates exhibited excellent DNase activity and 71 isolates revealed positive for l-asparaginase production.To our recognition,11 isolates exhibited constructive results in the production of 06 extracellular enzymes of industrial importance.Of 103 isolates,48 isolates were confirmed by molecular level identification.Based on the phylogenetic analysis,the isolates were categorized under the genera:Strep-tomyces,Nocardiopsis,Salinispora and Actinomadura.