Showing papers on "Excoecaria agallocha published in 2006"

Analysing ethnobotanical and fishery-related importance of mangroves of the East-Godavari Delta (Andhra Pradesh, India) for conservation and management purposes

Abstract: Mangrove forests, though essentially common and wide-spread, are highly threatened. Local societies along with their knowledge about the mangrove also are endangered, while they are still underrepresented as scientific research topics. With the present study we document local utilization patterns, and perception of ecosystem change. We illustrate how information generated by ethnobiological research can be used to strengthen the management of the ecosystem. This study was conducted in the Godavari mangrove forest located in the East-Godavari District of the state Andhra Pradesh in India, where mangroves have been degrading due to over-exploitation, extensive development of aquaculture, and pollution from rural and urbanized areas (Kakinada). One hundred interviews were carried out among the fisherfolk population present in two mangrove zones in the study area, a wildlife sanctuary with strong conservation status and an adjacent zone. Results from the interviews indicated that Avicennia marina (Forsk.) Vierh., a dominant species in the Godavari mangroves, is used most frequently as firewood and for construction. Multiple products of the mangrove included the bark of Ceriops decandra (Griff.) Ding Hou to dye the fishing nets and improve their durability, the bark of Aegiceras corniculatum (L.) Blanco to poison and catch fish, and the leaves of Avicennia spp. and Excoecaria agallocha L. as fodder for cattle. No medicinal uses of true mangrove species were reported, but there were a few traditional uses for mangrove associates. Utilization patterns varied in the two zones that we investigated, most likely due to differences in their ecology and legal status. The findings are discussed in relation with the demographic and socio-economic traits of the fisherfolk communities of the Godavari mangroves and indicate a clear dependency of their livelihood on the mangrove forest. Reported changes in the Godavari mangrove cover also differed in the two zones, with significantly less perceptions of a decrease in the protected area, as compared to the adjacent non-protected area. A posteriori comparisons between sequential satellite imagery (retrospective till 1977) and respondents that were at least 15 years back then, revealed a mangrove decrease which was however perceived to different extents depending on the area with which the fishermen were familiar. While local needs had not been incorporated in the existing policy, we created a framework on how data on ethnobotanical traditions, fishery-related activities and local people's perceptions of change can be incorporated into management strategies.

Pentacyclic Triterpenoids from Leaves of Excoecaria agallocha

Abstract: A new oleanane-type triterpenoid (1) and five known pentacyclic triterpenoids (2—6) were isolated from the leaves of Excoecaria agallocha. Their structures were elucidated by spectroscopic analyses. The new compound was characterized as 3β-[(2E,4E)-5-oxo-decadienoyloxy]-olean-12-ene (1). Compounds 1—6 were found inactive in vitro against several human cancer cell lines.

Further New Secoatisane Diterpenoids from the Chinese Mangrove Excoecaria agallocha L.

Abstract: Four new 3,4-seco-ent-atisane diterpenoids, agallochaols G–J (1–4), were isolated from the stems and leaves of the Chinese mangrove Excoecaria agallocha L Their structures were established on the basis of detailed spectroscopic analysis, chemical evidence, and by comparison with the literature data of related compounds

Mangrove extracts prevent the blood coagulate

Abstract: tions of extracts used (100, 500, and 1000 µg mL -1 ) and also with the levels of sulphate present in the samples. The anticoagulant activity was high in Avicennia marina and Aegiceras corniculatum compared to Excoecaria agallocha and Rhizophora spp.

Chemical Constituents of Mangrove Plant Excoecaria agallocha L.

Abstract: Nine compounds were isolated from the EtOAc extract of the leaves of Excoecaria agallocha L.by gel and silica gel column chromatography.On the basis of spectral data,they were identified as kayadiol(1),8(14),15-isopimaradiene-7α,18-diol(2),5,11-epoxy-9-hydroxy-7-megastigmen-3-one(3),annuionone E(4),28,30-dihydroxy-lup-20(29)-ene-3-one(5),messagenic acid G(6),3β,24dihydroxy-12-oleanen-28-oic acid(7),syringaresinol(8),and ethyl gallate(9).All the compounds were isolated from the plant for the first time.

Bioactivity of the methanol extract of Excoecaria agallocha Linn.(Euphorbiaceae)

Abstract: The methanol extract and residual methanol fraction of Excoecaria agallocha L. (Euphorbiaceae) stem bark was investigated in this study by wheat rootlet and shoot growth inhibition, and antimicrobial bioassay. The methanol extract and residual methanol fraction showed high inhibitory effect on both the wheat rootlet (82-89%) and shoot growth (85-90%) compared to control. The methanol extract showed a better and dose related inhibition on both the rootlet and shoot growth compared to residual methanol fraction. The value of methanol extract for rootlet and shoot were and , and of residual methanol fraction for rootlet and shoot were and . The methanol extract and residual methanol fraction did not show any antibacterial activity against the tested microorganisms of clinical isolates Escherichia coli, Staphylococcus aureous, Pseudomonas aeruginosa, Proteus vulgaris and Bacillus subtilis. The plant has the potential to be a source of novel cytotoxic compound(s).

Structure Elucidation of Taraxerone Isolated from Mangrove Excoecaria Agallocha

Abstract: Chemical screening method was used to isolate taraxerone from mangrove Excoecaria agallocha.The structure of taraxerone isolated was determined by NMR and EI-MS methods.The bio-activities of the compound were also evaluated and reported.

Pentacyclic Triterpenoids from Leaves of Excoecaria agallocha.

Abstract: A new oleanane-type triterpenoid (1) and five known pentacyclic triterpenoids (2—6) were isolated from the leaves of Excoecaria agallocha. Their structures were elucidated by spectroscopic analyses. The new compound was characterized as 3β-[(2E,4E)-5-oxo-decadienoyloxy]-olean-12-ene (1). Compounds 1—6 were found inactive in vitro against several human cancer cell lines.