刺激
细胞生长
老茧
超声波传感器
水稻
细胞生物学
超声波
化学
生物物理学
生物
分子生物学
生物化学
植物
内分泌学
医学
基因
放射科
作者
Liu Yiyao,Akio Yoshikoshi,Bochu Wang,Akio Sakanishi
标识
DOI:10.1016/s0927-7765(02)00052-8
摘要
Ultrasound acts as an alternative stress on cells or tissues. In this study it is aimed to investigate the effect of ultrasonic stimulation on the growth and proliferation of Oryza sativa Nipponbare cells (rice callus) in suspension culture. After the samples were stimulated by ultrasound at 28 kHz, we measured their growth and proliferation by using a colorimetric MTT ((3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay as well as fresh weights of the cells. Growth curves were obtained by fresh weights in the suspension culture after ultrasonic agitation for different time from 2 to 120 s. In MTT method, the optical density was determined at 570 nm in the cell suspension on 10 days after the ultrasonic agitation. Up to 5 s agitation OD570 increased; it decreased for more prolonged stimulation. We found that ultrasonic stimulation could promote the growth and proliferation of O. sativa Nipponbare cells in suspension culture with the optimal stimulation of 5 s, while with longer agitation, its growth and proliferation was inhibited. The mechanism may be that the ultrasound activated or destroyed the cellular structure, such as cell membrane, cytoskeleton and mitochondria in which many enzymes and ion channels are affected. In addition, the enhancement of cell wall and cell membrane fluidity might be one of the factors to promote the cell growth in 5-s ultrasonic stimulation.
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