Department of Agricultural Biotechnology, National Institute of Agricultural Science, Rural Development Administration, 370 Nongsaengmyoeng-ro, Deokjin-gu, Jeonju, Jeollabuk-do 54874, Korea.
Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea.
Int J Mol Sci. 2021 May 27;22(11):5739. doi: 10.3390/ijms22115739.
Sound waves affect plants at the biochemical, physical, and genetic levels. However, the mechanisms by which plants respond to sound waves are largely unknown. Therefore, the aim of this study was to examine the effect of sound waves on growth. The results of the study showed that seeds exposed to sound waves (100 and 100 + 9k Hz) for 15 h per day for 3 day had significantly longer root growth than that in the control group. The root length and cell number in the root apical meristem were significantly affected by sound waves. Furthermore, genes involved in cell division were upregulated in seedlings exposed to sound waves. Root development was affected by the concentration and activity of some phytohormones, including cytokinin and auxin. Analysis of the expression levels of genes regulating cytokinin and auxin biosynthesis and signaling showed that cytokinin and ethylene signaling genes were downregulated, while auxin signaling and biosynthesis genes were upregulated in exposed to sound waves. Additionally, the cytokinin and auxin concentrations of the roots of plants increased and decreased, respectively, after exposure to sound waves. Our findings suggest that sound waves are potential agricultural tools for improving crop growth performance.
声波会在生化、物理和遗传水平上影响植物。然而，植物对声波的反应机制在很大程度上是未知的。因此，本研究旨在探讨声波对植物生长的影响。研究结果表明，与对照组相比，每天暴露于 100 和 100 + 9k Hz 声波 15 小时、持续 3 天的种子具有更长的根生长。声波显著影响根尖分生组织的根长和细胞数量。此外，在暴露于声波的幼苗中，参与细胞分裂的基因被上调。根的发育受到一些植物激素（包括细胞分裂素和生长素）的浓度和活性的影响。对调节细胞分裂素和生长素生物合成和信号转导的基因表达水平的分析表明，暴露于声波中时，细胞分裂素和乙烯信号转导基因下调，而生长素信号转导和生物合成基因上调。此外，暴露于声波后，植株根中的细胞分裂素和生长素浓度分别增加和减少。我们的研究结果表明，声波是改善作物生长性能的潜在农业工具。
