| Title: | Induction of stress volatiles and changes in essential oil content and composition upon microwave exposure in the aromatic plant Ocimum basilicum |
| Author(s): | Lung I; Soran ML; Opris O; Trusca MRC; Niinemets U; Copolovici L; |
| Address: | "National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Street, Cluj-Napoca 400293, Romania. National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Street, Cluj-Napoca 400293, Romania. Electronic address: loredana.soran@itim-cj.ro. Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 1 Kreutzwaldi Street, Tartu 51014, Estonia. Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 1 Kreutzwaldi Street, Tartu 51014, Estonia; Institute of Technical and Natural Sciences Research-Development of 'Aurel Vlaicu' University, 2 Elena Dragoi Street, Arad 310330, Romania" |
| DOI: | 10.1016/j.scitotenv.2016.06.147 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Exposure to sustained low intensity microwaves can constitute a stress for the plants, but its effects on plant secondary chemistry are poorly known. We studied the influence of GSM and WLAN-frequency microwaves on emissions of volatile organic compounds and content of essential oil in the aromatic plant Ocimum basilicum L. hypothesizing that microwave exposure leads to enhanced emissions of stress volatiles and overall greater investment in secondary compounds. Compared to the control plants, microwave irradiation led to decreased emissions of beta-pinene, alpha-phellandrene, bornyl acetate, beta-myrcene, alpha-caryophyllene and benzaldehyde, but increased emissions of eucalyptol, estragole, caryophyllene oxide, and alpha-bergamotene. The highest increase in emission, 21 times greater compared to control, was observed for caryophyllene oxide. The irradiation resulted in increases in the essential oil content, except for the content of phytol which decreased by 41% in the case of GSM-frequency, and 82% in the case of WLAN-frequency microwave irradiation. The strongest increase in response to WLAN irradiation, >17 times greater, was observed for hexadecane and octane contents. Comparisons of volatile compositions by multivariate analyses demonstrated a clear separation of different irradiance treatments, and according to the changes in the volatile emissions, the WLAN-frequency irradiation represented a more severe stress than the GSM-frequency irradiation. Overall, these results demonstrating important modifications in the emission rates, essential oil content and composition indicate that microwave irradiation influences the quality of herbage of this economically important spice plant" |
| Keywords: | "Cell Phone Local Area Networks Microwaves/*adverse effects/classification Ocimum basilicum/chemistry/*radiation effects Oils, Volatile/*metabolism/radiation effects Volatile Organic Compounds/*metabolism/radiation effects *Wireless Technology Constitutive;" |
| Notes: | "MedlineLung, Ildiko Soran, Maria-Loredana Opris, Ocsana Trusca, Mihail Radu Catalin Niinemets, Ulo Copolovici, Lucian eng Netherlands 2016/07/01 Sci Total Environ. 2016 Nov 1; 569-570:489-495. doi: 10.1016/j.scitotenv.2016.06.147. Epub 2016 Jun 27" |
