Abstract
Volatile compounds released from callus and nucellar embryo tissues of ‘Valencia late’ and ‘Washington Navel’ sweet oranges (Citrus sinensis, L. Osbeck) were collected/concentrated by head space solid phase micro extraction and analysed by gas chromatography-mass spectrometry. Friable, white embryogenic cultures released a number of volatile compounds, including some essential oils. Different samples of the same embryogenic culture showed variability, possibly related to the presence of tissues undergoing differentiation. Analyses of the somatic embryos permitted the identification of several components, including limonene and methyl anthranilate. Considering the simplicity and the very small sample required (0.3 g of fresh tissue) head space solid phase micro extraction is suitable for studies and comparisons of volatile metabolites released from in vitro Citrus tissue cultures suggesting its potential in Citrus biochemical, genetic and breeding research.
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