Chemistry of five lichens of Sri Lanka and sequestration of lichen compounds by lycaenid butterfly talicada nyseus
| dc.contributor.author | Kathirgamanathar, Selvaluxmy | |
| dc.date.accessioned | 2024-10-01T07:13:26Z | |
| dc.date.available | 2024-10-01T07:13:26Z | |
| dc.date.issued | 2004 | |
| dc.description.abstract | The thesis is in two parts. Part I deals with the chemistry of five lichens: Pyxine consocians, Usnea sp., Heterodermia leucomelos, Lepraria atrotomentosa and Leproloma sipmanianum from Sri Lanka. Pyxine consocians, Usnea sp., Heterodermia leucomelos are common macrolichens from the montane zone while Lepraria atrotomentosa (new species) and Leproloma sipmanianum (new record) are two leprariod lichens. It describes the isolation and identification of a large number of compounds from five lichens and also discusses the results of the mosquito larvicidal assay against the second instar larvae of Aedes aegypti. Of the 16 or so natural products isolated from the extracts and sometimes the powder of the lichens, three were new compounds. The compounds, namely cabraleadiol monoacetate 55, 4-O-methylcryptochlorophaeic acid 45 and lichexanthone 57 (from Pyxine consocians), methyl ether of stictic acid 61 (from Usnea sp.) and 3, 6-dimethyl-2-hydroxy-4-methoxybenzoic acid 64 (from Heterodermia leucomelos and Leproloma sipmanianum) showed moderate activity against the second instar larvae of Aedes aegypti. Part II of the thesis deals with the sequestration of the compounds isolated from the lichen Leproloma sipmanianum by a lycaenid butterfly Talicada nyseus and also describes the investigations regarding the stage of entry of lichen compounds into the life cycle of the butterfly and also iis life history studies on Bryophyllum calycinum (host plant) and B. laciniata (a related species). | |
| dc.identifier.uri | https://ir.lib.pdn.ac.lk/handle/20.500.14444/1353 | |
| dc.language.iso | en_US | |
| dc.publisher | University of Peradeniya | |
| dc.subject | Plant sciences | |
| dc.subject | Lichens | |
| dc.subject | Lycaenic butterfly | |
| dc.subject | Lichen compounds | |
| dc.title | Chemistry of five lichens of Sri Lanka and sequestration of lichen compounds by lycaenid butterfly talicada nyseus | |
| dc.type | Thesis |