title: Biochemical and physiological changes in plants as a result of different sonic exposures.
abstract: The effects of two different sonic exposures on two vegetables, namely Chinese cabbage and cucumber at two growth stages, including seedlings and mature plants were investigated. The 3 h exposures included either 20 kHz sound waves or "green music" that comprised classic music and natural sounds such as those of birds, insects, water, etc. Analysis of variance between groups (ANOVA) was used to determine the appropriate statistics parameters for the different treatments. Both exposures caused significant elevations in the level of polyamines (PAs) and increased uptake of oxygen O(2) in comparison with the controls. For Chinese cabbage the highest PAs' levels were determined for both seedlings and mature plants that were exposed to "green music". The oxygen uptake in Chinese cabbage also increased as a result of sonic exposures, and the highest oxygen uptake was also observed after "green music" treatment. For cucumber, the highest content of PAs for both seedlings and mature cucumber plants was determined as a result of 20 kHz ultrasound exposure. 20 kHz exposure of mature plants also resulted in the highest level of oxygen uptake. No statistically significant differences in the vitamin C level were determined between the different sonic treatments and sham exposed vegetables.
authors.affiliation: Department of Entomology, China Agricultural University, Beijing 100094, PR China. qinych@163bj.com
authors.forename: Yu-Chuan
authors.initials: YC
authors.lastname: Qin
authors.forename: Won-Chu
authors.initials: WC
authors.lastname: Lee
authors.forename: Young-Cheol
authors.initials: YC
authors.lastname: Choi
authors.forename: Tae-Wan
authors.initials: TW
authors.lastname: Kim
mesh_terms: D001937:Brassica / Q000254:growth & development*; D018553:Cucumis sativus / Q000254:growth & development*; D010865:Pilot Projects; D011073:Polyamines; D013016:Sound; D014465:Ultrasonics
chemical_list: D011073:Polyamines