Citral and linalool content has been correlated to DNA content in Lippia alba (Mill.) N.E. Brown (Verbenaceae)

When grown under identical environmental conditions, wide variations in the principal essential oil constituents among Lippia alba accessions were observed. The genetic basis of the variations in chemotypes is discussed. •37 accessions of Lippia alba were kept under controlled conditions.•Wide varia...

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Published in:Industrial crops and products 2014-08, Vol.59, p.14-19
Main Authors: Viccini, Lyderson Facio, Silveira, Romena Sanglard, do Vale, Aline Amália, de Campos, José Marcello Salabert, Reis, Aryane Campos, de Oliveira Santos, Marcelo, Campos, Victoria Rabelo, Carpanez, Arthur Girardi, Grazul, Richard Michael
Format: Article
Language:English
Subjects:
Chemotype
DNA content
Essential oil composition
Genetic variation
Lippia alba
Verbenaceae
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Summary:When grown under identical environmental conditions, wide variations in the principal essential oil constituents among Lippia alba accessions were observed. The genetic basis of the variations in chemotypes is discussed. •37 accessions of Lippia alba were kept under controlled conditions.•Wide variations in the principal essential oil components were observed.•Linalool production was associated to an specific ploidy level.•A genetic base for the chemical variation is proposed. The possible association between the variations in the production of secondary metabolites and genetic traits within medicinal species is important to understand the basic aspects of such difference and to open new possibilities of their use and manipulation. We have obtained and cloned 37 accessions of Lippia alba from various regions in Brazil and analyzed their hydrodistillates. The samples were cloned from cuttings, grown under identical greenhouse conditions and collected simultaneously to eliminate as many variables as possible. The foliage was subjected to steam distillation and subsequently analyzed by GC/MS. The DNA content of the accessions was also estimated. In addition to some morphological variations, the principal essential oil components varied significantly among the samples. Some contained principally citral (geranial and neral), while others had a high linalool content. The genetic basis for these wide variations in chemotypes is discussed.
ISSN:0926-6690
1872-633X
DOI:10.1016/j.indcrop.2014.04.028