EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS

Surface compounds were obtained by a methylene chloride extraction of fresh aerial parts of Pseudognaphalium robustum. The methylene chloride extract was fractionated by CC and the fractions were analyzed by GC-MS. Since flavonoids and terpenes are present only in small amounts in the epicuticular e...

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Autores principales:	URZÚA,ALEJANDRO, MENDOZA,LEONORA
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	Pseudognaphalium robustum Asteraceae Methylene chloride extract Epicuticular components GC-MS Saturated fatty acid esters Unsaturated fatty acid esters Epicuticular triglycerides monoglycerides Chemosystematic
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100018
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spelling	oai:scielo:S0717-970720080001000182008-07-03EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONSURZÚA,ALEJANDROMENDOZA,LEONORA Pseudognaphalium robustum Asteraceae Methylene chloride extract Epicuticular components GC-MS Saturated fatty acid esters Unsaturated fatty acid esters Epicuticular triglycerides monoglycerides Chemosystematic Surface compounds were obtained by a methylene chloride extraction of fresh aerial parts of Pseudognaphalium robustum. The methylene chloride extract was fractionated by CC and the fractions were analyzed by GC-MS. Since flavonoids and terpenes are present only in small amounts in the epicuticular exúdate of P. robustum, 80% of the surface compounds actually correspond to a complex mixture of saturated fatty acid esters, unsaturated fatty acid esters, alcohols, aldehydes, fatty acids, alkenes, triglycerides and monoglycerides. A minor hydrocarbon fraction of n-alkanes from C23 to C37 was also identified. On the contrary, in P. vira vira, P. cheiranthifolium, and P. heterotrichium, the epicuticular extracts contain from 70% to 80% of a mixture of diterpenoids and n-alkanes. These results show a remarkable distance between P. robustum and other species of the genus, which share the same ecosystem, when the whole pool of epicuticular compounds is taken into account. Also, these considerable differences in chemical composition are in agreement with authors that consider Pseudognaphalium as a heterogeneous taxonomic groupinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.1 20082008-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100018en10.4067/S0717-97072008000100018
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Pseudognaphalium robustum Asteraceae Methylene chloride extract Epicuticular components GC-MS Saturated fatty acid esters Unsaturated fatty acid esters Epicuticular triglycerides monoglycerides Chemosystematic
spellingShingle	Pseudognaphalium robustum Asteraceae Methylene chloride extract Epicuticular components GC-MS Saturated fatty acid esters Unsaturated fatty acid esters Epicuticular triglycerides monoglycerides Chemosystematic URZÚA,ALEJANDRO MENDOZA,LEONORA EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS
description	Surface compounds were obtained by a methylene chloride extraction of fresh aerial parts of Pseudognaphalium robustum. The methylene chloride extract was fractionated by CC and the fractions were analyzed by GC-MS. Since flavonoids and terpenes are present only in small amounts in the epicuticular exúdate of P. robustum, 80% of the surface compounds actually correspond to a complex mixture of saturated fatty acid esters, unsaturated fatty acid esters, alcohols, aldehydes, fatty acids, alkenes, triglycerides and monoglycerides. A minor hydrocarbon fraction of n-alkanes from C23 to C37 was also identified. On the contrary, in P. vira vira, P. cheiranthifolium, and P. heterotrichium, the epicuticular extracts contain from 70% to 80% of a mixture of diterpenoids and n-alkanes. These results show a remarkable distance between P. robustum and other species of the genus, which share the same ecosystem, when the whole pool of epicuticular compounds is taken into account. Also, these considerable differences in chemical composition are in agreement with authors that consider Pseudognaphalium as a heterogeneous taxonomic group
author	URZÚA,ALEJANDRO MENDOZA,LEONORA
author_facet	URZÚA,ALEJANDRO MENDOZA,LEONORA
author_sort	URZÚA,ALEJANDRO
title	EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS
title_short	EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS
title_full	EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS
title_fullStr	EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS
title_full_unstemmed	EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS
title_sort	epicuticular components from pseudognaphalium robustum (asteraceae): chemosystematic considerations
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100018
work_keys_str_mv	AT urzuaalejandro epicuticularcomponentsfrompseudognaphaliumrobustumasteraceaechemosystematicconsiderations AT mendozaleonora epicuticularcomponentsfrompseudognaphaliumrobustumasteraceaechemosystematicconsiderations
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EPICUTICULAR COMPONENTS FROM PSEUDOGNAPHALIUM ROBUSTUM (ASTERACEAE): CHEMOSYSTEMATIC CONSIDERATIONS

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