[en] The roles played by root volatile organic compounds (VOC) remain essentially unknown. This study aims at identifying VOC contained by H. distichon roots at selected growth developmental stages. As an original contribution, these were positioned on growth models calibrated for barley plants cultivated in our growth conditions. By SPME-GC/MS, a total of 110 compounds were detected and 70% of them were tentatively identified based on their mass spectra and retention time. Alcohols, aldehydes, ketones and organic acid esters accounted for 55,5% of the total number of detected VOC. Multivariate analysis revealed qualitative and quantitative changes in such profiles according to the developmental stage. In general, the VOC content was the highest when young roots just emerged from the coleorhiza.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS