C-27 Apocarotenoids in the Flowers of Boronia megastigma (Nees)
Year: 2003
Type: article
Abstract: Five C-27 apocarotenoids were detected in acetone extracts of the flowers of Boronia megastigma (Nees) using HPLC with UV−vis photodiode array and MS detection. Comparison of methylated and unmethylated extracts aided identification when considered with the UV−vis and MS data. The five apocarotenoids identified here were hydroxy-apo-10‘-carotenoic acid ( 1 ), methyl hydroxy-apo-10‘-carotenoate ( 2 ), apo-10‘-carotenoic acid ( 3 ), apo-10‘-carotenal ( 4 ), and methyl apo-10‘-carotenoate ( 5 ). The data obtained was not sufficient to allow the specific isomeric forms to be unequivocally identified. The results further support speculation that the C-13 norisoprenoids found in boronia are derived from C-40 carotenoids. Possible parent molecules of β-ionone, an important component of boronia extract, were identified. An understanding of C-13 norisoprenoid biosynthesis may assist in the selection and postharvest processing of boronia flowers for flavor and fragrance applications. Keywords: Boronia megastigma (Nees); brown boronia; essential oils; carotenoids; apocarotenoids; β-carotene; β-ionone; C-13 norisoprenoids; biosynthesis; 3-hydroxy-β-apo-10‘-carotenoic acid; methyl 3-hydroxy-β-apo-10‘-carotenoate; β-apo-10‘-carotenoic acid; β-apo-10‘-carotenal; methyl β-apo-10‘-carotenoate
DOI: 10.1021/jf026007c
Institution: University of Tasmania
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2003663216