Document Detail


Preferred age for assessment of qualitative and quantitative characteristics of the essential oil of tea tree (Melaleuca alternifolia) seedlings prior to plantation establishment.
MedLine Citation:
PMID:  12848493     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
An analytical method for determining the quality and hence the chemical variety status of tea tree transplants is described. The key to the procedure was found to be the leaf age of the test material. Investigation at very early development stages was seen to give misleading results due to the sequential onset of different monoterpenoid biogenetic pathways. For example, in the first few leaves, the high concentration of terpinolene in the terpinen-4-ol variety suggests that the terpinolene variety is under investigation. However, 1,8-cineole percent concentrations in plantation tree leaf were approximately 1.6 times lower than those measured for seedlings prior to transplant. Consequently, the use of a plantation cineole indicator is proposed for estimating plantation cineole from seedling leaf analyses. Although recent investigations enable the chemotype status to be predicted with some certainty, it is now proposed that analysis of leaf set 10 at the age of 6 weeks (seedling age approximately 17 weeks) provides an unambiguous analysis and correlates seedling quality with mature plantation quality. In addition, the oil yield of mature tea tree leaf was found, by steam distillation, to be approximately 5 times higher than that of seedling leaf.
Authors:
Michael F Russell; Ian Southwell
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  51     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2003-07-09     Completed Date:  2003-09-09     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4254-7     Citation Subset:  IM    
Affiliation:
Wollongbar Agricultural Institute, Wollongbar, NSW 2477, Australia.
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MeSH Terms
Descriptor/Qualifier:
Cyclohexanols / analysis
Melaleuca / chemistry,  growth & development*
Monoterpenes*
Plant Leaves / chemistry
Seedling / chemistry,  growth & development*
Tea Tree Oil / analysis*
Terpenes / analysis
Chemical
Reg. No./Substance:
0/Cyclohexanols; 0/Monoterpenes; 0/Terpenes; 470-82-6/cineole; 562-74-3/terpinenol-4; 68647-73-4/Tea Tree Oil

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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