Four new cycloartane triterpenoids from the leaves of Dysoxylum binectariferum

Abstract Cassipourea congoensis (syn. Cassipourea malosana) is used in African countries as a skin-lightening agent. Two previously unreported cycloartane triterpenoids, 26-hydroxy-3-keto-24-methylenecycloartan-30-oic acid 1 and 24-methylenecycloartan-3β,26,30-triol 2 along with the known mahuannin B 3, 7-methoxymahuannin B 4, 7-methoxygeranin A 5, methyl-3-(4-hydroxy-3-methoxyphenyl)-2E-propenoate, glycerol-1-alkanoate, (E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-enal 6 , (-)-syringaresinol 7, and stigmast-5-en-3-O-β-D-glucoside, were isolated from the roots of C. congoensis. The crude extract and compounds 1 and 5 were found to inhibit the production of melanin at 10 µM with low cytotoxicity validating the ethnomedicinal use of this plant.

Download Full-text

Dysoxylum binectariferum Hook. f.

Indian Medicinal Plants ◽

10.1007/978-0-387-70638-2_541 ◽

2007 ◽

pp. 1-1

Author(s):

C.P. Khare

Keyword(s):

Dysoxylum Binectariferum

Download Full-text

Two New Cycloartane Triterpenoids fromKleinhovia hospita

Helvetica Chimica Acta ◽

10.1002/hlca.201300331 ◽

2014 ◽

Vol 97 (6) ◽

pp. 887-894 ◽

Cited By ~ 10

Author(s):

Jian-Xia Mo ◽

Yang Bai ◽

Bo Liu ◽

Chang-Xin Zhou ◽

Li Zou ◽

...

Keyword(s):

Cycloartane Triterpenoids

Download Full-text

Cycloartane triterpenoids from Guarea macrophylla

Phytochemistry ◽

10.1016/s0031-9422(02)00123-1 ◽

2002 ◽

Vol 60 (4) ◽

pp. 329-332 ◽

Cited By ~ 13

Author(s):

João Henrique G. Lago ◽

Nı́dia F. Roque

Keyword(s):

Cycloartane Triterpenoids

Download Full-text

Effect of rodents on seed fate of five hornbill-dispersed tree species in a tropical forest in north-east India

Journal of Tropical Ecology ◽

10.1017/s0266467409990083 ◽

2009 ◽

Vol 25 (5) ◽

pp. 507-514 ◽

Cited By ~ 18

Author(s):

Nandini Velho ◽

Aparajita Datta ◽

Kavita Isvaran

Keyword(s):

Tropical Forest ◽

Tree Species ◽

Camera Traps ◽

Seed Fate ◽

Seed Survival ◽

North East India ◽

North East ◽

Wide Range ◽

Dysoxylum Binectariferum ◽

Seed Fates

Abstract:Hornbills are important dispersers of a wide range of tree species. Many of these species bear fruits with large, lipid-rich seeds that could attract terrestrial rodents. Rodents have multiple effects on seed fates, many of which remain poorly understood in the Palaeotropics. The role of terrestrial rodents was investigated by tracking seed fate of five hornbill-dispersed tree species in a tropical forest in north-east India. Seeds were marked inside and outside of exclosures below 6–12 parent fruiting trees (undispersed seed rain) and six hornbill nest trees (a post-dispersal site). Rodent visitors and seed removal were monitored using camera traps. Our findings suggest that several rodent species, especially two species of porcupine were major on-site seed predators. Scatter-hoarding was rare (1.4%). Seeds at hornbill nest trees had lower survival compared with parent fruiting trees, indicating that clumped dispersal by hornbills may not necessarily improve seed survival. Seed survival in the presence and absence of rodents varied with tree species. Some species (e.g. Polyalthia simiarum) showed no difference, others (e.g. Dysoxylum binectariferum) experienced up to a 64% decrease in survival in the presence of rodents. The differing magnitude of seed predation by rodents can have significant consequences at the seed establishment stage.

Download Full-text