| The Content Variation of Natural Product Induced by Different Factor(s) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Species Name: Melaleuca quinquenervia | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Factor Name: Chemotype Comparison | [1] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Experiment Detail |
Plant material: Leaves of M. quinquenervia were collected from January to October during the ten year period (1992-2001) on mainly East part of Madagascar island and in particular on Toamasina, Mananjary, Manakara, Farafangana, Vangaindrano, Moramanga, and Ambatondrazaka locations. Olfactory chemotype selection: During the years 1992-1995, since the price for (E)-nerolidol and viridiflorol chemotypes was very strong, leaf collection was done on trees chosen after olfactory selection by a chief harvester who compared the olfactory threshold of crumple leaves with our clearly identified oil samples. After 1996, collection was done at random and no particular attention in leaf harvesting was taken.
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| Factor Function |
Niaouli essential oils from Madagascar were classified into three chemotypes using Principal Component Analysis (PCA): a cineole chemotype (49-62%), a viridiflorol chemotype (21-36%) and an (E)-nerolidol chemotype (56-95%). The 1,8-cineole chemotype is widespread, representing 92% of the samples investigated if the leaf collection is done at random.
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| Factor | Part | Location | NP Content | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Chemotype (Cineole type)
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Leaves | Madagascar |
NP Content: 0.23 %
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Chemotype (Viridiflorol type)
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Leaves | Madagascar |
NP Content: 0.73 %
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Chemotype (E-nerolidol type)
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Leaves | Madagascar |
NP Content: 0.35 %
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| References | ||||||||||||||||||||||||
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| 1 | Main Industrial Niaouli (Melaleuca quinquenervia) Oil Chemotype Productions from Madagascar | |||||||||||||||||||||||